Conference Programme GeMiC 2016 - menschlich - weltoffen€¦ · PO1.4: Miniaturized Broadband Three-Way Power Divider with 120° Phase Dif-ferences between Output Ports Hitoshi Hayashi1

Sessions

Monday, 14 March 2016

PO1: Interactive Poster Session 1Room: Foyer 12:40–13:40

PO1.1: A Multisection Ultra Wideband Directional Coupler in Multilayer Broad-side Coupled Stripline TechnologyDavid-Benjamin Grys1, Robert Storch2, Thomas Musch3

1Ruhr University Bochum, Germany; 2Krohne Innovation GmbH, Germany; 3Ruhr-Universität Bochum, GermanyTime: 12:40–12:40In this paper, we present a multisection directional coupler providing a tight couplingof 10 dB with an equal ripple of 0.8 dB across the frequency range of 360 MHz to5.8 GHz, which corresponds to a relative bandwidth of 177 %. To maximize couplingand reduce dispersion effects, the coupler uses broadside coupled striplines in a multi-layer setup. The four ports of the coupler are connected via standard SMA-connectorsthrough a stripline to microstrip transition that does not make use of vias. The designprocess is verified by EM simulations and measurements performed on a prototype.

PO1.2: Monitoring of Low Pressure Plasmas with a Calibrated ProbeJan Runkel1, Christian Schulz1, Moritz Oberberg1, Peter Awakowicz1, Ilona Rolfes1

1Ruhr-Universität Bochum, GermanyTime: 12:40–12:40In this contribution the use of the planar multipole resonance probe (pMRP) as a mon-itoring tool for low pressure plasmas is presented. By 3D electromagnetic simulations,the probe’s ability to monitor two important plasma parameters is investigated and afull one-port calibration is applied to ensure maximum monitoring precision. Measure-ments in a double inductively coupled argon plasma confirm the simulation results andprove the suitability of the calibrated pMRP for precise plasma monitoring.

GeMiC 2016 – Conference Programme 1

PO1.3: An Enhanced Super-Resolution Wavefront Extraction Algorithm forWideband FMCW Radar SystemsBenedikt Friederich1, Dilyan Damyanov2, Thorsten Schultze1, Ingolf Willms3

1Universität Duisburg-Essen, Germany; 2University of Duisburg-Essen, Germany;3University Duisburg-Essen, GermanyTime: 12:40–12:40Wideband radar analysis provides a high range resolution, which is important for rang-ing and material analysis. Two overlapping pulses of possible neighboring targetscould disturb the ranging and the material characterization. This, takes on greatersignificance for Radar systems that are able to penetrate lossy dielectric materials toperform subsurface imaging and material characterization. Therefore, a preprocessingof the received raw data is necessary in order to distinguish overlapping impulses.Conventional pulse separation methods, i.e. correlation based algorithms based onCLEAN [1] and constant false alarm rate (CFAR) algorithm can find multiple wavefronts,but these methods can not resolve richly interfered pulses. Hence, these methods arenot suitable for super-resolution applications. The dynamic correlation method (DCM)was introduced in [2] as super-resolution algorithm for the separation of multiple wave-fronts. Due to the complexity of this algorithm, the number of detected wavefronts islimited. For FMCWRadar the amplitude of interfered pulses has to be considered. Theintroduced algorithm combines the advantages of the conventional separation methodand the super-resolution ability of DCM. Therefor, non-interfered pulses are clusteredand each cluster is examined by an amplitude dynamic correlation method (ADCM).Furthermore, this enhancement of DCM considers different amplitudes levels of inter-fered pulses. The validation of the ADCM is carried out based on measurement of acomplex scattering environment with 4 targets.

PO1.4: Miniaturized Broadband Three-Way Power Divider with 120° Phase Dif-ferences between Output PortsHitoshi Hayashi11Sophia University, JapanTime: 12:40–12:40This paper presents a miniaturized broadband three-way power divider with 120°phase differences between output ports. The divider is developed by using a cascadeconnection of 90° Lange couplers and is implemented on an FR4 substrate. For thefrequency range of 440-770 MHz, which corresponds to a relative bandwidth of more

2 GeMiC 2016 – Conference Programme

Ses

sion

s:M

onda

y

than 54%, the divider exhibits power splits of −5.3 ± 0.6 dB, return losses greaterthan 20 dB, and isolation between output ports greater than 19 dB. Furthermore, forthe frequency range of 560-580 MHz, the divider exhibits errors in the desired relativephase difference between output ports of less than 4°. The measurement results re-veal the feasibility of the proposed power divider configuration for broadband circuitapplications with the output ports located well away from each other.

PO1.5: Passive alignment of an optical fiber on a multi-layer ceramic module forradio-over-fiber applicationsSumy Mathew1, Tilo Welker2, Nam Gutzeit3, Steffen Spira1, Ralf Stephan1, JensMüller2, Matthias Hein2

1Technische Universität Ilmenau, Germany; 2Ilmenau University of Technology, Ger-many; 3Ilmenau University of Technology & IMN, GermanyTime: 12:40–12:40The low-temperature co-fired ceramics technology is a successful and space-qualifiedtechnology enabling three-dimensional microwave design. Now we are pursuing animportant step further towards multi-functional multi-purpose hybrid assembly tech-nologies: combining ceramic technology with optical fiber technology. In a photonics-assisted system, fiber alignment is a crucial issue. Extra gadgets used for the fiberalignment make the system more complex and bulky. Considering the many featuresoffered by the ceramic multi-layer technology for size reduction, it is advantageous touse this technology for the passive alignment of optical fiber above the optical source.In this paper, the passive alignment of fiber employing flip-chip mounting of a verticalcavity surface emitting laser in a ceramic substrate are presented. We have studied theperformance of the resulting optical link with respect to figures typical for radio-over-fiber applications, namely the link gain, noise figure and the spurious-free dynamicrange and compared the results with a link where the VCSEL is wire bonded to thecircuit.

PO1.6: Advanced Receiver Testing in a high Volume Environment using PogoCross-talkStephan Fuchs1, Robert Weigel21Intel Deutschland GmbH, Germany; 2University of Erlangen-Nuremberg & Eesy-id,GermanyTime: 12:40–12:40


Because of the rapid development of cellular technologies towards highly integratedmultimode transceivers capable of worldwide interoperability in multiple frequencybands, more and more receiver bands as well as receiver ports are integrated in asingle silicon device. For ensuring highest quality standards in customer delivery, ac-curate testing and characterization of all these ports is essential. However, the highvolume testing becomes increasingly more time consuming due to the number of portsand the respective load board design. This paper demonstrates a feasible way to in-crease throughput by higher multisite efficiency with sharing one internal RF-sourceby using pogo X-talk.

PO1.7: Microwave-Photonic FiltersStefan Preussler1, Avi Zadok2, Yoni Stern2, Thomas. Schneider3

1Technische Universität Braunschweig, Germany; 2Faculty of Engineering, Bar-IlanUniversity, Israel; 3Institut für Hochfrequenztechnik, Technische Universität Braun-schweig, GermanyTime: 12:40–12:40Microwave-photonic filters (MPF) can overcome the limitations of electrically imple-mented counterparts. MPF can have a very broad bandwidth, they are tunable andeven the filter shape can be changed by programming. Here we review our recentresults in the implementation of MPF. The filters are based on a delay-and-sum ar-chitecture or on a shaping of the gain bandwidth of stimulated Brillouin scattering. Allpresented setups are tunable in their filter shape, central wavelength and bandwidth.

PO1.8: Design of Wide-Band Corrugated Feed Horn for Reflector Antenna inRadar ApplicationsAlexander Haas1, Markus Peichl1, Simon Anger2

1German Aerospace Center (DLR), Germany; 2German Aerospace Center (DLR) &Microwaves and Radar Institute, GermanyTime: 12:40–12:40DLR - Microwaves and Radar Institute - is currently developing a new high-resolutionradar system for the imaging of satellites in orbits up to 1000 km. In order to applythe principle of inverse synthetic aperture radar imaging the system uses a steerableCassegrain antenna and a possible operational frequency range between 8 GHz to12.4 GHz. This paper shall give a short introduction considering the basic steps in


Ses

sion

s:M

onda

y

the development of a wide-band corrugated horn antenna as feed for the Cassegrainantenna system, providing similar beam width in E and H plane.

PO1.9: Next Generation mm-Wave Wireless Backhaul Based on LOS MIMOLinksDarko Cvetkovski1, Tim Haelsig2, Berthold Lankl2, Eckhard Grass3

1Humboldt University of Berlin, Germany; 2University of Federal Armed Forces Munich,Germany; 3IHP & Humboldt-University Berlin, GermanyTime: 12:40–12:40With the evolution of the mobile networks towards more dense and flexible configura-tions, novel wireless backhaul solutions that can match the high capacity and flexibilitydemands are required as a replacement for the fixed fiber optics solutions. In this workwe analyze the core backhaul requirements and the related system design challengesfor utilizing the mm-wave frequency band due to the large available bandwidth. Wedetermine the key performance metrics in terms of achievable throughput and energyefficiency of several transmission schemes seeking for a viable solution for the smallcell backhaul scenario. Finally, an insight to the structure of the baseband domainrequired for processing multiple transmitted streams at the full system bandwidth ispresented for a proposed LOS SM-MIMO system concept.

PO1.10: Application of Selected Performance Test Scenarios on Multi-channelUHF ReceiversRalph Trommer1, Philipp Quednau1, Lorenz-Peter Schmidt21Friedrich-Alexander-University Erlangen-Nuremberg, Germany; 2University ofErlangen-Nuremberg, GermanyTime: 12:40–12:40In a preceding paper a multi-channel test signal generator for UHF radar applicationswas presented. The present contribution shows the application of this generator totest the performance of multi-channel receivers in selected scenarios. Exemplary mea-surement results are presented showing the usable dynamic range and the maximumpacket reception rate for a secondary surveillance radar receiver and a smart meterdata collector. Furthermore the direction-of-arrival estimation precision and the sourceseparation capabilities of the receivers are tested under various conditions.


PO1.11: Synthesis and Design of Narrowband Bandpass Filters in WaveguideTechniqueStefan Reible1, Reinhold Herschel1, Ralf Brauns1, Dirk Nüßler2, Nils Pohl11Fraunhofer FHR, Germany; 2Fraunhofer Institute for High Frequency Physics andRadar Techniques FHR, GermanyTime: 12:40–12:40The design and realisation of a high order bandpass filter in the millimetre wavelengthis presented. It is purely based on split-block hollow-metal waveguide technology. Thesynthesis process starting at the equivalent lowpass filter is demonstrated, involvingthe use of K-inverters and equivalent circuits for waveguide discontinuous. This resultsin a compact iris filter with less than 1.2 GHz bandwidth at 94 GHz and more than 40dB suppression at 0.5 GHz offset while the insertion loss is kept as low as 3 dB. Thedesign is verified by EM simulation and experimental characterisation of a manufac-tured prototype to underline the potential of the filter for innovative system design inthe millimetre wave range.

PO1.12: Rapid Patch Antenna Array Design for a Satcom- DemonstratorKorbinian Schraml1, Ralf Wilke1, Dirk Heberling1

1RWTH Aachen University, GermanyTime: 12:40–12:40This paper presents an efficient, systematic approach to design a set of antennademonstrators. The process and its building blocks are explained as well as a shortoverview on two examples of antenna arrays is given.

PO1.13: The Influence of Rain on Small Aperture LiDAR SensorsThomas Fersch1, Alexander Buhmann2, Alexander Koelpin3, Robert Weigel41Friedrich-Alexander University Erlangen-Nuremberg & Robert Bosch GmbH, Ger-many; 2Robert Bosch GmbH, Germany; 3University of Erlangen-Nuremberg & Institutef. Electronics Engineering, Germany; 4University of Erlangen-Nuremberg, GermanyTime: 12:40–12:40The influence of rain on pulsed LiDAR systems with a miniaturized aperture and smalllaser beam cross sections was investigated based on two situations deemed critical.First, discrete rain drops appearing very close to the laser aperture could lead to acomplete deflection of the laser beam out of the original direction when drop andbeam overlap. Our semi-probabilistic, semi-analytical model however indicates that


Ses

sion

s:M

onda

y

the rate of deflected scan events is negligible. Second, the emitter surface could be,to a greater or lesser extent, covered with drops of various size, degrading the perfor-mance. We found an optimum ratio between drop diameter and laser beam diameter,favoring larger laser beams. Also this effect however is, in total, not critical.

PO1.14: Linearity and Efficiency Improvement using Envelope Tracking PowerAmplifierFelix Auer1, Stefan Schiller2, Michael Kamper2

1Fraunhofer-Institut für Integrierte Schaltungen IIS, Germany; 2Fraunhofer IIS, Ger-manyTime: 12:40–12:40This paper presents linearity improvement of power amplifiers (PAs) with envelopetracking (ET) modulators. ET modulators vary the supply voltage of RF power am-plifiers to optimize the efficiency, but potentially degrade the linearity of the system.However, ET has shown to improve both efficiency and linearity under certain condi-tions. This work presents an analytical study of the PA linearity with supply voltagemodulation. The theoretical considerations are supported by performance measure-ments using an ET hardware implementation.

PO1.15: Farfield Coupling of Antennas in terms of S-ParametersAndreas Diewald1

1Hochschule Trier, GermanyTime: 12:40–12:40In a former publication the author reported some results about antenna coupling whichare calculated by an analytical approach without going into detail. The derivation of thisanalytical approach is given in this paper. The scattering parameters of purely passiveantennas including the phase information is calculated. The method is used for anin-house developed radar simulator for active and passive electromagnetic sensing.


S01: Terahertz and PhotonicsRoom: HIC, Chairs: Cartsten Brenner, Jerome Faist, Rolf Jakoby 11:00–12:40

S01.1: 3D Printed Waveguides for 120 GHzJan Balzer1, Marcel Weidenbach1, Stefan Busch1, Martin Koch2

1Philipps-Universität Marburg, Germany; 2Phillips-Universität Marburg, GermanyTime: 11:00–11:20In this work we investigate waveguides for 120 GHz which are fabricated by a 3Dprinter. We use right-angled waveguides with different length to determine the attenu-ation in the waveguides. Further, we analyze a Y-shaped beam splitting structure.

S01.2: Plant water status monitoring with THz QTDSArno Rehn1, Ralf Gente1, Thorsten Probst1, Jan Balzer1, Martin Koch2

1Philipps-Universität Marburg, Germany; 2Phillips-Universität Marburg, GermanyTime: 11:20–11:40We demonstrate how water status measurements on plants can be performed usingterahertz quasi time domain spectroscopy (THz QTDS). Compared with conventionalTHz TDS, this approach enables much more cost-efficient measurement setups andthus brings the technology closer to it’s application in the field. Exemplary data isobtained from examining the drought stress response of rye and soy.

S01.3: Power Budget Analysis and Optimization of Photonic Beamforming Con-cepts for Terahertz TransmittersKevin Kolpatzeck1, Lars Haering1, Andreas Czylwik1

1University of Duisburg-Essen, GermanyTime: 11:40–12:00Among all concepts for beamforming in terahertz frequency transmitters, those basedon a photonic approach are particularly interesting, given the possibility of terahertzgeneration by photomixing. By moving the power distribution as well as phase andamplitude adjustment network of a photodetector-fed array from the electrical into theoptical domain, antenna design is greatly simplified and better use can be made of thesmall terahertz power delivered by photomixing. However, for highest RF output power,optical input power of the photodetectors needs to be optimized. A photonic phaseshift beamforming approach is presented along with its mathematical description. Forthis approach, a power budget analysis is carried out and most effective placement ofoptical amplifiers in the beamforming network is investigated. Based on these results,


Ses

sion

s:M

onda

y

the improvement in equivalent isotropically radiated power over a single radiator isnumerically calculated for arrays of different sizes.

S01.4: Terahertz wave generation from dual wavelength monolithic integratedDistributed Bragg Reflector semiconductor laser diodeJared Gwaro1, Cartsten Brenner2, Martin Hofmann3

1Ruhr Universität, Germany; 2Ruhr-Universität Bochum, Germany; 3Ruhr-universityBochum, GermanyTime: 12:00–12:20THz wave generation from a dual wavelength distributed Bragg reflector (DBR) semi-conductor diode laser connected by an Y-shaped waveguide with photoconductive an-tennas is demonstrated. Two fibre coupled photoconductive antennas were employedto generate and detect the beat frequency of the two lasers by lock in technique. Tera-hertz frequencies of approximately 300GHz were demonstrated via photomixing witha tuning range between 290 GHz to 320GHz.

S01.5: WGM resonators with microfluidic channel for sub-mm wave characteri-zation of biological liquidsAlexander Barannik1, Nickolay Cherpak2, Alexey Gubin1, Iryna Protsenko1, SvetlanaVitusevich3

1O. Usikov Institute for Radiophysics and Electronics of NASU, Ukraine; 2UsikovInstitute for Radiophysics and Electronics, National Academy of Sciences, Ukraine;3Forschungszentrum Juelich, GermanyTime: 12:20–12:40We present the measurement technique for studying the electromagnetic propertiesof small-volume water solutions of bioliquids in sub-THz band. The measurement cellis based on the quartz resonator covered by the plastic layer with the microfluidicchannel filled with the liquid under test. The experimental and numerical studies of theresonator with the microfluidic channel filled with liquids with known properties werecarried out to show the suitability of the resonator structure for the permittivity mea-surements. The resonator structure with the microfluidic channel filled with glucoseand albumine water solutions was studied experimentally. The solution permittivityvalues can be obtained by solving of the inverse electromagnetic problem.


S02: Tomography and ImagingRoom: HID, Chairs: J-C Chiao, Dr Helmut Ermert, Dirk Manteuffel, Andreas Penirschke 16:00–18:00

S02.1: Multiport Calibration for Microwave Tomography SystemsMarc Zimmermanns1, Ilona Rolfes1, Patrik Gebhardt1, Malte Mallach1, ThomasMusch1

1Ruhr-Universität Bochum, GermanyTime: 16:00–16:20A method for the calibration of an ultra-wideband microwave tomography system ispresented. The objective for this measurement system is to calculate the spatial distri-bution of the dielectric parameters and thereby different materials. Scattering param-eters are used to describe the setup and are given to the reconstruction algorithmfor evaluation. The measured wave parameters of this system are influenced by themeasurement instrument as well as by the setup itself. In addition, it is also necessaryfor the reconstruction to obtain the scattering parameters at a well defined referenceplane. Both requirements can be achieved by the help of a multiport error correctionalgorithm used for the calibration of a Vector Network Analyzer (VNA). In a first step,an error model for the tomographic system is presented. Secondly, this paper providesa concept for calibration standards which can be used for this application. Since a to-mographic system do not offer the possibility for the use of classic reflection standardsor a change in the mechanical length of the transmission other calibration standardshave to be found. The idea of a homogeneous filling of the tomograph is presented.With the help of a simulation model the requirements for the system as well as theaccuracy of the results are analyzed. In addition, measurement results are shown tovalidate the proposed approach.


Ses

sion

s:M

onda

y

S02.2: Microwave Imaging Technique for Lung Tumour DetectionOluwatosin Babarinde1, Faizal Jamlos1, Ping Jack Soh2, Dominique Schreurs3, Adal-bert Beyer4

1Universiti Malaysia Perlis, Malaysia; 2Universiti Malaysia Perlis (UNIMAP) &Katholieke Universiteit Leuven, Malaysia; 3KU Leuven, Belgium; 4Duisburg-Essen Uni-versity, GermanyTime: 16:20–16:40In this work, experimental results from a study on the feasibility of detecting tumourtissue in the lung within the thorax is reported. The thorax phantom was realised usingtissue simulating liquids with matching dielectric properties. The microwave imageswere reconstructed from the acquired backscattered signals using the delay-and-sumimaging algorithm. The described microwave imaging technique shows that it is possi-ble to detect tumour in the lung during breathing activities of inhalation and exhalation.

S02.3: Near-Field Measurements and Dual-Tuned Matching of Two CDRA Ver-sions for Combined 1H/23Na 7T-MRIJan Taro Svejda1, Daniel Erni1, Andre Rennings1

1University of Duisburg-Essen, GermanyTime: 16:40–17:00First near-field measurement results of two different congeneric dual resonant anten-nas (CDRAs) are presented in this paper. Each CDRA generates a half-wavelengthcurrent distribution at two desired resonance frequencies tailored to the magnetic res-onance frequency of 1H- and 23Na-nuclei for 7Tesla magnetic resonance imaging(MRI). Furthermore, the dual-tuned matching and feeding networks for these antennatypes are discussed and shown in this paper as well. The presented CDRAs arebased on composite right/left-handed (CRLH) transmission lines terminated with openor short circuits providing two different current and field distributions between bothCDRA versions.

S02.4: Towards Thermal Differential Imaging for Ultra-wideband MicrowaveBreast Cancer DetectionJochen Moll1, Mohamed El Houssaini1, Fabian Dornuf1, Viktor Krozer2

1Goethe University Frankfurt am Main, Germany; 2Goethe University of Frankfurt amMain, GermanyTime: 17:00–17:20


Microwaves can be employed for biomedical applications to generate physically inde-pendent information about the biological tissue compared to conventional techniquessuch as X-ray, ultrasound or MRI. One challenge to increase the sensitivity of mi-crowave diagnostics is the elimination of the high amplitude reflection that occurs atthe skin surface and which masks the small amplitude reflections coming from the tu-mour. In this paper, we will present a novel approach for contrast enhanced microwaveimaging of the breast where the temperature dependency of the biological tissue isused together with its ability to heat biological tissue. A dielectric contrast has been ob-served at a small temperature increase of about 1°C, similar to fever, which is enoughto extract the scattering response of the tumor.

S02.5: Coupling Investigation between RF Coil Array Elements backed by Sur-face Impedance Characterized Shields for 7 Tesla MRIZhichao Chen1, Klaus Solbach2, Daniel Erni1, Andre Rennings1

1General and Theoretical Electrical Engineering (ATE), Faculty of Engineering, Uni-versity of Duisburg-Essen, Germany, Germany; 2High Frequency Engineering (HFT),Faculty of Engineering, University of Duisburg-Essen, Germany, GermanyTime: 17:20–17:40In this paper we present a coupling investigation between RF coil array elements whichare backed by surface impedance characterized RF shields for 7 Tesla magnetic reso-nance imaging (MRI). Two simulation models for the RF coil elements are consideredhere: an ideal impressed current model for an initial 2-D investigation, and a symmetri-cally fed dipole with meander terminals for the 3-D investigation. The RF shield, whichis placed behind the coil element, is characterized by a surface impedance boundarycondition (SIBC), where different surface impedances are defined. An optimal surfaceimpedance of the RF shield can be found to achieve minimum coupling between neigh-boring coil elements. Different spatial arrangements (e.g. the shape of the phantom,the edge-to-edge separation between coupled coil elements, the separation from coilelement to RF shield) are considered. In general, a large surface impedance providesa higher coupling level in comparison to a small surface impedance. As the sepa-ration distance from the coil element to the RF shield increases, a reduced surfaceimpedance selectivity of the coupling behavior is observed. The proposed fundamen-tal investigation reveals a new approach to modify the coupling characteristics of thedipole coil elements for MRI.


Ses

sion

s:M

onda

y

S02.6: Conceptualization, design and simulation of a hybrid antenna system asa simultaneous RF hyperthermia applicator at 600 MHz and RF coil for magneticresonance imaging at 3 TeslaJamal Slim1, Dirk Heberling1, Jörg Felder2, Jon Shah2

1RWTH Aachen University, Germany; 2Forschungszentrum Juelich, GermanyTime: 17:40–18:00This paper presents the conceptualization, design and simulation of a hybrid multi-frequency antenna system for Radio Frequency (RF) hyperthermia and MagneticResonance Imaging (MRI) applications with ultra-sharp hotspot. Two different bowtieantenna arrays have been designed, simulated and integrated. The first antenna arrayis designed as an RF coil for MR imaging. It is optimized to generate a highly homo-geneous transmit B1+ field and is intended for 3 T MRI systems. This correspondsto a frequency of 128 MHz. The second array aims to induce heat by accumulatingthe electromagnetic energy at one location thereby forming a hotspot. The operatingfrequency of the second system is 600 MHz. The computed homogeneity of the B1+field generated by the imaging antennas shows similar values compared to a birdcagecoil at the same frequency. The size of the hotspot generated by the heating subsys-tem was 26 x 26 x 93 mm3. The heating produced by the MR imaging antennas wasnegligible, compared to the RF hyperthermia applicator.


S03: Waveguide EngineeringRoom: HIC, Chairs: Daniel Erni, Dirk Heberling 16:00–18:00

S03.1: Analysis of Composite Materials with Periodically Aligned Inclusions Us-ing 3D EM Field SimulationsChristoph Baer1, Birk Hattenhorst2, Christian Schulz3, Bianca Will2, Ilona Rolfes3,Thomas Musch3

1Ruhr-Universität Bochum & Institute of Electronic Circuits, Germany; 2Ruhr-UniversityBochum, Germany; 3Ruhr-Universität Bochum, GermanyTime: 16:00–16:20In this contribution, the effective permittivity of material compositions with special focuson the influence of periodically aligned inclusions is investigated. Therefore, severalelectromagnetic simulations on the material under test (MUT), which consists of ahomogeneous host material and numerous spherical inclusions, are performed. Bymeans of a rectangular waveguide setup, FDTD-simulations, and accurate permittivitydetermination algorithms, the MUT’s effective, complex permittivity is investigated overa broad frequency range. Moreover, the results of materials with periodically alignedinclusions are compared to materials with fully randomized inclusions that exhibit equalmaterial parameters. Detailed information on the investigation procedure as well ascomparisons to theoretical permittivity values, calculated by common mixing equations,are presented and discussed.

S03.2: Modeling and Design of Stepped Transitions for Substrate-IntegratedWaveguidesThomas Jaschke1, Benjamin Rohrdantz2, Wanja Gitzel2, Arne Jacob2

1Technische Universität Hamburg-Harburg & Institut für Hochfrequenztechnik, Ger-many; 2Technische Universität Hamburg-Harburg, GermanyTime: 16:20–16:40A stepped transition in substrate-integrated waveguide (SIW) technology is presented.The transition changes the height of an SIW using multiple steps. The steps can betuned by varying the length of shorted stubs which represents a generalization of astepped-impedance-transformer. An accurate equivalent circuit model of the steps isdeveloped, that enables fast optimization. An exemplary transition is designed thatfeatures two frequency bands at 20 GHz and 30 GHz. For verification the model iscompared to full-wave simulations and a back-to-back coplanar-waveguide (CPW) to


Ses

sion

s:M

onda

y

full-height SIW transition is fabricated and measured.

S03.3: An Efficient Approach for Reflectivity and Coupling Computation in anAbruptly Ended Planar Layered Waveguide Using Modified Formulation of CGF-RFFMAbdorreza Torabi1, Amir Ahmad Shishegar1

1Sharif University of Technology, IranTime: 16:40–17:00An efficient method for computation of surface wave (SW) reflectivity and couplingin an abruptly ended planar layered waveguide is presented. Using characteristicGreen’s function (CGF) technique, the original structure is approximated by a separa-ble structure. Then by applying rational function fitting method (RFFM) a uniform andclosed-form expression of spatial Green’s function for separable structure is derived.Having a full wave solution of the original structure, an optimization problem is definedto find the reflection coefficients of SW modes. Unlike the previous presented CGFbased method called CGF-complex images (CI), CGF-RFFM leads to easy incorpo-ration of radiation modes effects in the optimization step and more accurate resultsconsequently. The CGF-RFFM derivation is also modified to incorporate the couplingmatrix of SWs to obtain the coupling coefficients. Simple implementation, high accu-racy as well as generality of the method are the main advantages of the proposedmethod. Excellent agreements with rigorous methods are illustrated in several exam-ples.

S03.4: Eigenmodes of partially filled coaxial waveguidesCarsten Monka1, Joerg Schoebel21Technische Universität Braunschweig & Institut für Hochfrequenztechnik, Germany;2Technische Universität Braunschweig, GermanyTime: 17:00–17:20In this paper, we present the derivation of the rotationally symmetric TM Eigenmodes(n=0) of a coaxial waveguide partially filled with a dielectric. If kp1 is element of theimaginary numbers and larger than 0 there is one solution to the waveguide’s charac-teristic equation which provides the fundamental TM mode. Higher order TM modesfollow for solutions where kp1 is element of the real numbers and larger than zero.


S03.5: Electrical Biasing Scheme for Liquid-Crystal-Based Tunable SubstrateIntegrated Waveguide StructuresAnanto Eka Prasetiadi1, Sabrina Rahmawati1, Christian Weickhmann2, MatthiasNickel1, Matthias Jost1, Tobias Franke2, Wenjuan Hu1, Holger Maune1, Rolf Jakoby3

1Technische Universität Darmstadt, Germany; 2TU Darmstadt, Germany; 3Institute forMicrowave Engineering and Photonics, Technische Universität Darmstadt, GermanyTime: 17:20–17:40In this paper, an electrical biasing structure is proposed for a tunable Substrate Inte-grated Waveguide (SIW) device with Liquid Crystal (LC) as the tuning component. Thebiasing circuits or electrodes are made of chromium and gold layers. Silicon nitridelayer, which has a thickness of 1 µm, is employed to isolate the electrodes againstground. Since voltage as high as ±200 V may be applied, high breakdown voltagesare required. As a proof of concept, a simple LC-SIW phase shifter based on a tunabledelay line is manufactured and sealed with the fabricated biasing structure. Simulationresults exhibit a Figure of Merit (FoM) of 89 °/dB at 20 GHz. The fabricated phaseshifter give FoM of 32 °/dB with switching time of 5 s.

S03.6: Comparison of hollow waveguide and dielectric fibre based SPDTswitches for W-bandMatthias Jost1, Roland Reese1, Joshua Pauls1, Jay Gautam1, Romain Gemble1, Chris-tian Weickhmann2, Onur Karabey1, Rolf Jakoby3

1Technische Universität Darmstadt, Germany; 2TU Darmstadt, Germany; 3Institute forMicrowave Engineering and Photonics, Technische Universität Darmstadt, GermanyTime: 17:40–18:00This work presents as a first approach, the comparison of two non-tuneable/switchableW-band single pole double throws (SPDTs), one realised in hollow waveguide and onein subwavelength dielectric fibre technology. For pre-investigations, both SPDTs areequipped with non-tuneable phase shifters, providing a fixed differential phase shift of90° between the two paths. The waveguide SPDT shows a reflection better than -10dB and an isolation between the two output ports of around 16 dB. The fibre SPDTshows reflections better than -10 dB over a wide frequency range and down to -25 dBat 100 GHz, but an isolation between 4 dB to 10 dB only. This deviation compared tosimulations is due to the sensitivity of the system in terms of fabrication toleranceswhereby the needed differential phase shift of 90° has been exceeded. Next, thesephase shifters will be replaced by continuously tuneable phase shifters based on liquid


Ses

sion

s:M

onda

y

crystal technology. At this point, dielectric fibres are a very promising alternative tohollow waveguides.


SP1: Special Session - SatComRoom: HID, Chairs: Arne Jacob, Siegfried Voigt 11:00–12:40

SP1.1: High Resolution Patterning of LTCC based Microwave Structures for Q/V-Band Satellite ApplicationsAlexander Schulz1, Nam Gutzeit2, Dirk Stöpel1, Tilo Welker1, Matthias Hein1, JensMüller1

1Ilmenau University of Technology, Germany; 2Ilmenau University of Technology &IMN, GermanyTime: 11:00–11:20Highly substrate integrated microwave circuits for space applications require a highmetal pattern accuracy for transmission line structures and components. Within thiswork four fine line structuring processes for multilayer Low Temperature Cofired Ce-ramics (LTCC) are compared regarding pattern tolerances, electrical performance andprocess implementation capability. An embedded 60 GHz strip line filter is used asdemonstrator device. The reference filter (type I) is manufactured by fine line screenprinting and standard LTCC processing. Type II is based on a printed resinate layeron a prefired substrate in combination with lithography, electrodeposition and tape-on-substrate (ToS) technology. Type III and IV are made by laser ablation of printed thickfilm pastes in dried and fired state respectively. The latter type requires a subsequentToS-process to embed the filter.

SP1.2: Tunable Microwave Component Technologies for SatCom-PlatformsHolger Maune1, Mohammad Nikfalazar2, Christian Schuster2, Tobias Franke2, Wen-juan Hu1, Matthias Nickel1, Daniel Kienemund1, Ananto Eka Prasetiadi1, ChristianWeickhmann2, Matthias Jost1, Alex Wiens2, Rolf Jakoby3

1Technische Universität Darmstadt, Germany; 2TU Darmstadt, Germany; 3Institute forMicrowave Engineering and Photonics, Technische Universität Darmstadt, GermanyTime: 11:20–11:40Modern communication platforms require a huge amount of switched RF componentbanks especially made of different filters and antennas to cover all operating frequen-cies and bandwidth for the targeted services and application scenarios. In contrast,reconfigurable devices made of tunable components lead to a considerable reductionin complexity, size, weight, power consumption, and cost. This paper gives an overviewof suitable technologies for tunable microwave components. Special attention is given


Ses

sion

s:M

onda

y

to tunable components based on functional materials such as barium strontium ti-tanate (BST) and liquid crystal (LC).

SP1.3: Rx/Tx Integration Concepts for Ground Segment SatCom Antenna Ar-raysThomas Jaschke1, Benjamin Rohrdantz2, Hans Mitto2, Arne Jacob2

1Technische Universität Hamburg-Harburg & Institut für Hochfrequenztechnik, Ger-many; 2Technische Universität Hamburg-Harburg, GermanyTime: 11:40–12:00This paper discusses antenna array integration concepts for combined receiver (Rx)and transmitter (Tx) terminals that can be used for ground based Ka-band satellitecommunications (SatCom). The combination of Rx and Tx enables very compact arrayarchitectures, which eases integration on mobile platforms. The associated challengesare discussed in the SatCom context and a comprehensive analysis of the array gridsis carried out. Advanced dual-band antenna designs are presented for both tile andbrick architecture. A dielectric-lens based wideband antenna is introduced as an ele-ment of a dual-band array in brick architecture. The approach eases the integration ofthe required passive and active circuitry.

SP1.4: Active Multi-Feed Satcom Systems with GaN SSPA at K-BandPhilip Feuerschütz1, Christian Rave1, Stanislav Samis2, Christian Friesicke3, RüdigerQuay3, Willibald Konrath4, Klaus Hirche4, Dennis Schobert5, Michael Schneider5, ArneJacob1

1Technische Universität Hamburg-Harburg, Germany; 2Technische Universität Ham-burg Harburg, Germany; 3Fraunhofer IAF, Germany; 4TESAT Spacecom GmbH & Co.KG, Germany; 5Airbus DS GmbH, GermanyTime: 12:00–12:20The ongoing developments of satellite antenna technology, mainly of multiple-feed-per-beam (MFB) concepts, combined with advanced compound semiconductor andpackaging technologies that provide the building blocks for a new generation of K-band satellites, are reported. This paper proposes a next generation MFB applicationscenario using the advantages of both new antenna and solid-state power amplifierconcepts.


SP1.5: Modular Concept for Satcom Terminal AntennasMatthias Geissler1, Oliver Litschke1, Simon Otto1, Roman Gieron1

1IMST GmbH, GermanyTime: 12:20–12:40This paper describes a new modular concept for the realization of antennas for mobilesatellite communications. The antenna concept is based on an active planar array,which is subdivided into modular subarrays. The antenna main beam can be steeredby using a combined mechanical and electronical steering approach. The modularconcept of both the aperture design as well as the beam steering allows easy tailoringof the antenna to the specific requirements of particular mobile applications like cars,trains, planes or ships.


Ses

sion

s:M

onda

y

SP2: Special Session - Wireless 100 Gb/s and beyondRoom: ID 03/471, Chairs: Rolf Kraemer, Ullrich Pfeiffer, Martin Vossiek 16:00–18:00

SP2.1: A DC to 10.1 GHz, 31 dB Gain Range Control, Digital Programmable GainAmplifierXuan-Quang Du1, Markus Groezing1, Matthias Buck1, Manfred Berroth1

1University of Stuttgart, GermanyTime: 16:00–16:20A fully-differential, digital programmable gain amplifier (PGA) with a gain control rangeof 31 dB and step size of 1 dB is presented. The chip is fabricated in a 0.13 µmBiCMOS technology and consumes 284 mW. At a maximum gain of 25 dB, the PGAexhibits a 3-dB bandwidth of 10.1 GHz. The measured gain error for all 32 possiblegain settings is between -0.19/+0.46 dB at 1 GHz. Up to 13 GHz the third harmonicdistortion HD3 stays below -34 dB for all 32 gain settings at a differential output peak-to-peak voltage of 1 V after the last amplifier stage.

SP2.2: Multiple-Feed On-Chip Antennas for 100 Gbit/s Wireless SystemsBenjamin Goettel1, Stefan Malz2, Ullrich Pfeiffer2, Thomas Zwick3

1Karlsruhe Institute of Technology, Germany; 2University of Wuppertal, Germany;3Karlsruhe Institute of Technology (KIT), GermanyTime: 16:20–16:40One of many promising applications for silicon-MMICs is a short range, highspeed wire-less data transmission of up to 100 Gbit/s. A high carrier frequency above 200 GHzcan be used to achieve an ultra-compact radio module with high data rates using ahigh absolute bandwidth of 25-40 GHz, while keeping the relative bandwidth moderate(10-15 %). In this work different possibilities for active multiple feed on-chip antennasfor an efficient power-combining of several amplifiers at millimeter-wave (mm-wave)frequencies are investigated. Therefore the on-chip antennas and power splitters areconsidered in detail and verified by calibrated gain measurements up to 325 GHz. TheMMIC integration of on-chip antennas including several amplifiers is additionally pre-sented for different antenna topologies. The decreasing emitter areas (SiGe) or gatelengths (GaAs) at mm-wave frequencies are the reason for the limited output powerof transistors. The most common power-combining concept is the parallelization of


several amplifiers with adequate splitter and combiner networks. If each parallelizedamplifier saturates, the output power can be theoretically increased by 3 dB by dou-bling the number of amplifiers. However, the backend processes of semiconductortechnologies offer high losses which makes low loss combiner networks as depicted inFig. 1 left difficult to realize. A second approach is the use of an antenna array whereeach antenna element is directly connected to an amplifier. In this case, the power-combination in air offers the disadvantage to use more antennas which increases theoverall chip size. With the proposed active antenna and it’s concentrated phase centerit can be used as primary radiator for an integrated lens antenna (ILA) which offersone of the most efficient approaches for on-chip radiators.

SP2.3: Broadband W-Band Power Amplifier using 40 nm bulk CMOSTung Tran1, Sönke Vehring1, Yaoshun Ding1, Amin Hamidian2, Georg Boeck3

1Berlin Institute of Technology, Germany; 2Technical Institute of Berlin, Germany; 3TUBerlin, GermanyTime: 16:40–17:00In this paper the design and measurement of a four stage broadband differential poweramplifier intended for W-Band using 40 nm bulk CMOS is presented. In order toachieve broadband performance a complex output matching network consisting oftransmission line elements and transformers is employed. Furthermore a reliable tech-nique that includes neutralized transistor cores is introduced. The transistor dimensionand matching network are optimized for the best compromise between bandwidth, out-put power and power-added-efficiency. Measurements show broadband characteristicfrom 75 GHz until 110 GHz with more than 10 dBm of output power and 10 % ofpower-added-efficiency at 1.1 V supply voltage.

SP2.4: Evaluation of a Compact Antenna Concept for UWB Massive MIMODirk Manteuffel1, Peter Hoeher1, Niklas Doose1

1University of Kiel, GermanyTime: 17:00–17:20A compact antenna concept for ultra wideband massive MIMO is proposed and evalu-ated. The concept is based on the simultaneous excitation of different CharacteristicModes on each element of the multi element antenna. Thereby, a 484 port antennawith low port to port correlation having only 121 physical antenna elements is gener-ated. Its performance for MIMO systems is evaluated by link-level capacity simulations.


Ses

sion

s:M

onda

y

SP2.5: A Wideband Phase Detector SiGe HBT MMIC for Multi-Gigabit Syn-chronous ReceiversAleksey Dyskin1, Parisa Harati2, Daniel Müller3, Tobias Messinger2, Ingmar Kallfass2

1Technion - Israel Institute of Technology, Israel; 2University of Stuttgart, Germany;3Karlsruhe Institute of Technology, GermanyTime: 17:20–17:40This paper reports a phase detector MMIC operating in the frequency range of DC to40 GHz, with an average power conversion gain of 11 dB with wideband input match-ing. The MMIC is realized in 0.25 µm SiGe HBT technology. The phase detector isdedicated to form a Costas loop for broadband binary phase shift keyed signals.

SP2.6: Distributed On-Chip Antennas to Increase System Bandwidth at 180GHzRonny Hahnel1, Bernhard Klein1, Christoph Hammerschmidt1, Dirk Plettemeier2, PaoloTesta1, Corrado Carta2, Frank Ellinger1

1Technische Universität Dresden, Germany; 2Dresden University of Technology, Ger-manyTime: 17:40–18:00This paper presents integrated, distributed on-chip antennas. The aim is to achieve ahigher system bandwidth due to the utilization of multiple antennas and the combiningof their frequency ranges. All designs will be manufactured in the 130nm IHP SG13G2process. Furthermore the measurement setup is described and measurement resultsare shown.



Ses

sion

s:Tu

esda

y

Tuesday, 15 March 2016

PL: Plenary SessionRoom: HID 12:50–14:00

PO2: Interactive Poster Session 2Room: Foyer 11:50–12:50

PO2.1: Enhanced Physical Layer Security Using Monopulse AntennasAdam Narbudowicz1, Korbinian Schraml2, Max Ammann3, Dirk Heberling2

1Dublin Institute of Technology \ RWTH Aachen University, Germany; 2RWTH AachenUniversity, Germany; 3Dublin Institute of Technology, IrelandTime: 11:50–11:50The paper proposes a new method for private point-to-point communication. It em-ploys a monopulse antenna system, where the summary beam is used to transmit theuseful signal to the intended receiver, while the differential beam is used to generatenoise, in order to bury the signal for angles other than boresight. The method is testedusing simulated QPSK modulation, providing a beamwidth with bit error rate below10-4 within ±6°, while raising BER steep to 0.5 at 32°.

PO2.2: Radar-based Detection of Birds Near Wind Energy Plants: First Experi-ences from a Field StudyJochen Moll1, Moritz Mälzer1, Nikolas Scholz1, Viktor Krozer2, Manfred Dürr3, DimitryPozdniakov4, Rahmi Salman5, Ralp Zimmerman6, Markus Scholz7

1Goethe University Frankfurt am Main, Germany; 2Goethe University of Frankfurt amMain, Germany; 3Volta Windkraft GmbH, Germany; 4HF Systems Engineering GmbH& Co. KG, Germany; 5HF Systems Engineering GmbH & Co. KG & Hübner HoldingGmbH, Germany; 6HF System Engineering, Germany; 7Wölfel Beratende IngenieureGmbH + Co. KG, GermanyTime: 11:50–11:50Bats and birds are at risk when they are flying near wind energy plants (WEP). Hence,a protection of bats and birds is postulated to reduce its mortality e.g. due to collisionswith the rotorblades. This paper reports on the first experiences from an experimentalfield study at a 2MW-WEP that combines a 24~GHz Doppler radar, a smart-camera,


an ultrasound microphone and an accelerometer. Radar measurements for the identi-fication of birds in their natural habitat will be presented and validated with the camera-based approach.

PO2.3: High-Speed Start-Up and Low-Power Decoding Circuit for Wireless Sen-sor NetworksHitoshi Hayashi11Sophia University, JapanTime: 11:50–11:50A high-speed start-up and low-power decoding circuit for wireless sensor networksis presented. The Manchester code that is currently used for Ethernet (10BASE-T),noncontact IC cards, and RFID systems requires a phase-locked loop because theintervals of the state transition change. In the proposed circuit, state transitions occurperiodically at the center of a waveform owing to the use of an encoding method in-volving several waveforms.

PO2.4: Optically Transparent and Circularly Polarized Patch Antenna for K-BandApplicationsQuang Huy Dao1, Tracy Jepkoech Cherogony1, Bernd Geck1

1Leibniz Universität Hannover, GermanyTime: 11:50–11:50This contribution presents an optically transparent and circularly polarized patch an-tenna to be integrated on a solar cell. The whole configuration is suitable to be usein a wireless sensor node acting as a communication interface and a power source.The antenna consisting of grid lines is studied concerning the impedance behaviordue to the applied mesh. A single fed truncated corners meshed patch antenna withmeshed ground plane on quartz glass is investigated. This structure with an overalltransparency of 92 % has similar antenna properties to the opaque counterpart. Ad-ditionally, the alignment errors between both meshed layers possibly caused by thefabrication process is addressed concerning the axial ratio. A prototype is realized andmeasured to verify the simulation results.


Ses

sion

s:Tu

esda

y

PO2.5: Performance of Mobile Base Station using Genetic Algorithms in Wire-less Sensor NetworksNurul Adilah Abdul Latiff1, Idrus Salimi Ismail21University Malaysia of Terengganu, Malaysia; 2Universiti Malaysia Terengganu,MalaysiaTime: 11:50–11:50Wireless sensor network is composed of large number of sensor nodes and base sta-tion. The sensor node usually is irreplaceable and powered by limited power supply.Taking the fact into consideration, a network should operate with minimum energy aspossible to increase lifetime of network for improving the overall energy efficiency. Inthis work, we proposed a protocol for mobile base station using Genetic Algorithms tofind optimal position for base station from virtual base station locations called prede-termined locations of base station. Simulation results for performance of the proposedprotocol in term of normalized network lifetime shows that the larger size of networkfield, the lower value for normalize lifetime. The results also show that there are mini-mum numbers of predetermined locations of base station required for larger networkfield in order for sensor nodes able to transmit their data to base station.

PO2.6: Spatial Smoothing for Coherent MIMO Radar Setups with Minimum Re-dundancyAndreas Kirschner1, Juergen Detlefsen2, Wim Mees3

1Technische Universität München, Germany; 2Technische Universitaet Muenchen &Fachgebiet HFS, Germany; 3RMA, BelgiumTime: 11:50–11:50This paper covers coherent MIMO radar systems with collocated antennas combinedwith minimum redundancy principles. The fundament of the first are virtual arrayswhich can be considered as discrete convolution of transmitter and receiver distribu-tions. This technique can be connected to sparse arrays regarding minimum redun-dancy (MR) aspects. However, MR setups are usually suited for so-called uncorrelatedsignal scenarios, whereas coherent MIMO radar setups provide correlated or coherentsignal outputs. The standard angular signal processing of MR arrays would becomecorrupted in coherent signal case. The spatial smoothing algorithm can provide a pos-sible solution for this conflict by lateral shifts. However, the pure amount of requiredshifts would make the idea of sparse arrays obsolete. Therefore, the spatial smoothingalgorithm was adapted in order to find also sparse lateral shift positions. The solution


could again be found by means of minimum redundancy. This paper presents simula-tion results which were generated during design and implementation of radar sensors.

PO2.7: RCS Measurements of a Human Hand for Radar-Based Gesture Recog-nition at E-bandPhilipp Hügler1, Martin Geiger2, Christian Waldschmidt21Ulm University, Germany; 2University of Ulm, GermanyTime: 11:50–11:50This paper presents monostatic radar cross section (RCS) measurements of a humanhand in the frequency range from 60 GHz to 90 GHz. These values are importantparameters for system designs in the emerging field of radar-based gesture recogni-tion. The measurement procedure is described in detail and results of four gestures atthree different distances are depicted and analysed.

PO2.8: Methods and apparatus for microwave thermotherapy based on slow-wave systemsAndrey Yelizarov1, Ruslan Shaymardanov1, Yuriy Pchelnikov2

1Moscow Institute of Electronics and Mathematics, NRU Higher School of Economics,Russia; 2SloWaves Inc., USATime: 11:50–11:50One of the perspective directions of slow wave systems usage is possibility of theirimplementation in biology and medicine as antennas and radiators for radio-frequencyand microwave physical therapy, a radiothermy and a tomography, sensitive elementsfor medical diagnostics, devices for sterilization and heat treatment. Advantages ofslow wave systems usage in biology and medicine are based on electrodynamic anddesign features of structures which follow from distribution of an electromagnetic fieldnear their surfaces. Here we are looking for features for usage of slow wave systemson area with high value of dielectric permeability, in particular to biofabrics, and alsothe problems related to creation of electrodes for intracavitary microwave physicaltherapy on slow wave systems with primary concentration of electric field in biofabrics,adjacent to electrode surface. In this article the results of modeling microwave radiatoron the basis of a ribbed coaxial line were received using Ansoft HFSS v.12 and CSTMicrowave Studio 2011 software.


Ses

sion

s:Tu

esda

y

PO2.9: Design of a Switched Injection-Locked Oscillator as an Active Backscat-ter Transponder for a 2.45GHz FMCW Radar SystemMarkus Schulz1, Niko Joram2, Christoph Tzschoppe2, Frank Ellinger2

1TU Dresden, Germany; 2Technische Universität Dresden, GermanyTime: 11:50–11:50This paper presents a fully integrated active backscatter transponder for the use ina FMCW radar system for localization of passengers in sea in case of a ship sink-ing emergency. The active reflector tag is based on a cross-coupled oscillator circuittopology operating as a switched injection- locked oscillator (SILO). The circuit wasimplemented in a 180nm BiCMOS technology. Measurements resulted in an outputpower of 12.6dBm while consuming a DC power of 69mW, thus achieving a high effi-ciency of 26%. Furthermore, the frequency tuning range is 18%, the start-up time is5.5ns

PO2.10: Metamaterial-based frequency selective surface with a band gap elec-tronic adjustmentAndrey Yelizarov1, Alexander Kukharenko2

1Moscow Institute of Electronics and Mathematics, NRU Higher School of Economics,Russia; 2SRUSI, RussiaTime: 11:50–11:50Currently, frequency selective surfaces, based on metamaterials are increasingly im-portant in microwave technique. The mushroom-type metamaterial surfaces allowsolving such tasks as isolation of elements in antenna arrays, multipath mitigating inGNSS systems, reduction of the ground plane edge influence on the directivity of theantenna elements etc. The usage of these structures in the microwave devices designcan significantly improve their properties and performance. Structurally mushroom-type metamaterials are periodic microstrip structures and their properties dependstrongly on the parameters of the substrate and the accuracy of manufacturing of theconductive pattern. As these structures have a narrow band gap, expensive materialsand high precision technologies should be used for their manufacturing. A methodof the mushroom-type metamaterial band gap electronic readjustment is proposed inthis paper. The idea of the method is that a variable-capacitance diode, should beplaced between two coupled mushroom hats one terminal of which is grounded fordirect current through a metalized via of the metamaterial element, and the other oneis connected to a controlled DC voltage source. At the same time the mushroom hats


are separated by at least two capacitive gaps, one of which is in parallel with a variable-capacitance diode, which equivalent capacitance is determined by the DC voltage ofthe controlled source. The design of a band gap metamaterial-based frequency se-lective surface with an electronic readjustment of the working band, and the resultsof its numerical modeling, which show the working band frequency movement whilethe changing of the lumped elements capacitance are presented. The calculation ofthe structure dielectric parameters, which confirms that the proposed structure is ametamaterial, is provided.

PO2.11: Influence of the Wafer Chuck on Integrated Antenna MeasurementsLinus Boehm1, Markus Hehl1, Christian Waldschmidt11University of Ulm, GermanyTime: 11:50–11:50For meaningful pattern measurements of integrated antennas the devices, which arerequired during the measurement process, need to be optimized to influence the mea-surement results as little as possible. In this paper the errors caused by reflections onthe chuck are investigated and quantified. A plastic chuck was built to reduce sourcesof reflection and thus improve the overall accuracy of the setup. The new chuck causesless ripples over the scanning angle and over the frequency and therefore, increasesthe performance of the setup significantly.

PO2.12: Novel DGS Shape for Mutual Coupling ReductionAdham Mahmoud1, Abdelmegid Allam1

1German University in Cairo, EgyptTime: 11:50–11:50This paper presents a MIMO antenna system configuration. The paper is devoted tominimize the mutual coupling between antennas fed from different ports with the use ofDGS structures. The paper discusses the system with and without introducing a novelDGS shape. The antennas are operating at 5GHz (Wi-Fi application). It contributes amutual coupling reduction up to 14.4 dB. The antenna configuration is fabricated. Itconducts a good agreement between the measured and simulated scattering coeffi-cients. The antenna gain, pattern and current density are nearly unchanged for thedifferent configurations.


Ses

sion

s:Tu

esda

y

PO2.13: An Integrated 118.4 to122 GHz Low Noise Phase- Locked Loop (PLL) in0.13 µm SiGe BiCMOS TechnologyUmair Ali1, Martin Bober1, Andreas Thiede1

1University of Paderborn, GermanyTime: 11:50–11:50Design of a PLL based frequency synthesizer which is able to provide signals overthe frequency bands 118.4-122 GHz, 59.2-61 GHz, and 29.6-30.5 GHz is presentedin this paper. A fundamental voltage controlled oscillator (VCO) and two high speeddivide by two frequency divider stages are used to cover all three frequency ranges.The first divider stage is a digital dynamic divider while second stage is a static fre-quency divider. The measured PLL phase noise is -95 dBc/Hz at an offset of 100KHz from 30 GHz output. The circuit is fabricated in IHP 0.13 µm SiGe BiCMOStechnology with ft and fmax of 300 GHz and 500 GHz, respectively. The whole PLL oc-cupies chip area of 0.7 mm2. The total DC power consumption of the PLL is 0.93 Watt.

PO2.14: Integrated, 16 - 21GHz Marchand Balun in 65nm CMOSAhmed Hamed1, Mohamed Elsayed2, Renato Negra1

1RWTH Aachen University, Germany; 2RWTH Aachen, GermanyTime: 11:50–11:50This paper presents the design and implementation of an integrated wideband Marc-hand balun in standard 65nm CMOS technology. The proposed balun operates from16 GHz to 21 GHz achieving high coupling together with significantly low phase andamplitude imbalance between the balun outputs. A new balun structure is proposed tosolve the nonideal ground problem in CMOS-based microwave circuits, and coherentlyenables the injection of DC signal to bias the consecutive circuits. The proposed pro-totype is implemented in TSMC 65nm 1P9M standard CMOS technology occupyingtotal area of 280 um X 310 um, and achieves maximum phase variation of +/-2deg,and maximum amplitude imbalance of 2 dB which makes it suitable for wideband mi-crowave applications.


PO2.15: An Adaptive Biasing Method for SRD Comb GeneratorsThomas Harzheim1, Holger Heuermann2, Michel Marso3

1FH Aachen - University of Applied Sciences, Germany; 2FH Aachen, Germany;3Université du Luxembourg, LuxemburgTime: 11:50–11:50This paper presents an adaptive biasing method for step recovery diode based combgenerators which are controlled by a software routine. The aim is to provide the max-imum possible harmonic output power for a given configuration and different inputfrequencies during input power variation. This increases the usefulness of comb gen-erators as harmonic phase reference sources for non-linear VNA measurements in themillimeter wave range. The effects are studied on a SRD comb generator which is ableto generate -30...-20 dBm harmonics in the 50 to 60 GHz range when wideband ter-minated. It is shown that depending on the combination of input power and frequency,different bias level behaviors for maximum harmonic output power over frequency exist.Data for maximum power level bias is provided for output frequencies up to 60 GHz.Additionally the effect of subharmonic comb frequency generation is demonstrated.

PO2.16: A Practical Approach for RF Circuit Size ReductionXuan Anh Nghiem1, Renato Negra1

1RWTH Aachen University, GermanyTime: 11:50–11:50In this paper, a practical approach to circuit miniaturisation using periodically loadedtransmission lines is presented. A full investigation of T- and -shaped unit cells thatconstitutes periodic structures (PS) has been conducted, leading to a straightforwardmethod for miniaturizing passive RF/Microwave circuits and components. For the com-pletion of the design method, the normalised 3 dB cutoff frequency of unit cells hasbeen thoroughly studied, providing a guideline for optimum structure parameters thatmeet the required bandwidth while ensuring a reasonable size reduction ratio. Fordemonstration, a broadband power divider/combiner with a frequency band of 1.0-3.0GHz has been implemented, showing very good performance with a size reduction ofabout 47% compared to the conventional design.


Ses

sion

s:Tu

esda

y

PO2.17: Fundamental Limitations of Crystal Oscillator Tolerances on FMCWRadar AccuracyMohammed El-Shennawy1, Belal Al-Qudsi1, Niko Joram2, Frank Ellinger2

1TU Dresden, Germany; 2Technische Universität Dresden, GermanyTime: 11:50–11:50Crystal oscillators (XOs) are widely used in fractional-N phase locked loops (Frac-NPLLs) as reference frequency sources due to their good phase noise performance.However, these XOs have manufacturing tolerances in the range of few tens of partsper million (ppm). When a Frac-N PLL is used in frequency modulated continuouswave (FMCW) radar applications, the XO accuracy affects the frequency and timingaccuracies of the radar chirps and so it directly affects the distance measurement ac-curacy. In this work, the fundamental limits of XO tolerance on distance measurementaccuracy of FMCW radars are discussed and modelled. Moreover, an FMCW radarsystem hardware prototype is developed. Measurement results are in good agreementwith the expectations of the simulation model.


S04: Microwave SensorsRoom: HID, None 08:30–09:50

S04.1: Differential Measuring Dual Six-Port Concept and Antenna Design for anInline Foil Thickness SensorSebastian Mann1, Sarah Linz1, Stefan Erhardt2, Stefan Lindner1, Fabian Lurz1, HolgerMaune3, Robert Weigel1, Alexander Koelpin4

1University of Erlangen-Nuremberg, Germany; 2University of Erlangen-Nürnberg,Germany; 3Technische Universität Darmstadt, Germany; 4University of Erlangen-Nuremberg & Institute f. Electronics Engineering, GermanyTime: 08:30–08:50Sensor elements play an important role in future manufacturing plants. This paperpresents a solution for a foil thickness sensor for running production lines. Based onthe elaborated Six-Port concept, a differential measuring concept is proposed anddiscussed. Furthermore, an end-fire antenna design for the addressed application isdemonstrated and far field measurement results are shown and compared to simula-tion. Finally, interference effects between two antennas are experimentally investigatedas a function of the relative rotation between two oppositely placed devices.

S04.2: A 868 MHz Wireless Transmitter for a Sensor-System-in-FoilJochen Briem1, Markus Groezing1, Manfred Berroth1

1University of Stuttgart, GermanyTime: 08:50–09:10This paper presents a 868 MHz Wireless transmitter on an ultra-thin 0.5 µm CMOSgate-array for a wireless and bendable sensor-system-in-foil. Because of the technol-ogy constraints an ASK modulation is used. The simulated maximum output power is10 dBm. As required for the application specific developed protocol, the transmitter’sswitch-on time is very low. Thus the presented PLL has an optimized lock-in time, with-out distorting spectrum or stability. Furthermore a flexible biasing network optimizesoscillator behavior and enables proper PLL-functionality at different process-corners.


Ses

sion

s:Tu

esda

y

S04.3: A 24 GHz Dielectric Sensor Based on Distributed ArchitectureFarabi Jamal1, Subhajit Guha2, Mohamed Hussein Eissa1, Dietmar Kissinger1, JanWessel11IHP, Germany; 2IHP Microelectronics, GermanyTime: 09:10–09:30In this paper, a dielectric sensor based on distributed architecture topology is pre-sented. The measured sensor delivers the dielectric information as a notch frequencybetween 21 GHz to 25 GHz. The proposed sensor is intended to perform as a mi-crowave dielectric sensor to identify bio-materials but can be used for other applica-tions as well. It is fabricated in a standard 0.25 µm SiGe BiCMOS process with HBTs(fT /fmax = 120/140 GHz) and it consumes 13.4 mW DC power. The sensor has beensimulated and measured with different dielectric materials. For proof of concept, firstexperiments have been conducted for air, epoxy resin and honey. Owing to the dis-tributed concept and the destructive interference, a sensitivity of 0.32 GHz per unitpermittivity (1.35% of the center frequency) was achieved. Based on these permittivitymeasurements, the presented results illustrate that this technique is a promising solu-tion for biomaterial sensing and characterization.

S04.4: Design and Realization of a Microwave Applicator for Diagnosis and Ther-mal Ablation Treatment of Cancerous TissueCarolin Reimann1, Margarita Puentes1, Martin Schüßler1, Rolf Jakoby2

1TU Darmstadt, Germany; 2Institute for Microwave Engineering and Photonics, Tech-nische Universität Darmstadt, GermanyTime: 09:30–09:50Microwave sensors play a significant role in medical environments. The contact-lessand non-invasive sensing mechanism to determine the dielectric properties of tissueis of great advantage. In this work, a dual mode microwave sensor is designed tocombine the diagnosis and treatment of cancer in one minimal invasive surgery tool.In order to detect abnormalities, the relative change of permittivity of healthy tissuecompared to tumor tissue is evaluated. For the treatment mode, microwave ablationis used to eradicate malignant cells. The challenges of the design process are thedimension limitation and packaging with an appropriate interface of the sensor inte-grated in a needle-like surgery tool. The small size leads to a significant increase ofthe operating frequency up to 40 GHz with the advantage of using very low input powerfor the thermal ablation procedure. The sensor provides a maximum temperature of


over 100°C with 2 W input power. Prototypes of the proposed sensors are fabricatedto measure the transmission characteristics of the structures unloaded and loaded.


Ses

sion

s:Tu

esda

y

S05: Power Amplifier 1Room: HIC, None 08:30–09:50

S05.1: Load Modulation with an Adaptive Matching Network Based on MEMSfor Efficiency Enhancement of an Inverse Class-F Power AmplifierSteffen Probst1, Bernard Lüers1, Bernd Geck2

1Leibniz Universitaet Hannover, Germany; 2Leibniz Universität Hannover, GermanyTime: 08:30–08:50In this contribution a 10 Watt gallium nitride (GaN) based inverse class-F power ampli-fier with an adaptive matching network realized with MEMS (micro electro mechanicalsystems) is presented. The developed power amplifier uses an adaptive output match-ing network for the enhancement of the power added efficiency over the dynamicoutput range. With the output matching network an efficiency enhancement of 20 pp(percentage point) at 10-dB-back-off is achieved.

S05.2: A 56 W Power Amplifier with 2-Level Supply and Load ModulationSebastian Kelz1, Martin Schmidt2, Nikolai Wolff3, Manfred Berroth2, WolfgangHeinrich3, Olof Bengtsson3

1Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik, Germany;2University of Stuttgart, Germany; 3Ferdinand-Braun-Institut, Leibniz-Institut für Höch-stfrequenztechnik, GermanyTime: 08:50–09:10Dynamic load modulation is proposed to improve the efficiency of an RF power ampli-fier with discrete supply modulation. A 47.5 dBm, 2.7 GHz power amplifier is realizedto show the potential of the method. The amplifier design is based on continuouswave load-pull measurements to determine the optimum load impedances, using thestatistics of a 10.2 dB PAPR OFDM signal. The output network contains a single SiCvaractor for adaptive output matching. The supply voltage is adjusted by a 2-levelsupply modulator. Static evaluation of the amplifier shows an improvement in PAE ofapproximately 9.7 percentage points at 10 dB back-off due to load modulation.

S05.3: Challenges in the Design of Wideband GaN-HEMT based Class-G RF-Power AmplifiersNikolai Wolff1, Wolfgang Heinrich1, Olof Bengtsson1

1Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, GermanyTime: 09:10–09:30


In GaN-based power amplifiers (PA) the gain under continuous wave (CW) excitationcompresses slowly over a wide power range. Also, due to memory-effects in the GaN-HEMT, the gain for modulated excitation with varying envelope differs from the CWvalue. On the other hand, design approaches for supply voltage modulated systemsbased on post-processing of CW measurements are in widespread use. This paperscrutinizes these approaches in a case study for a class-G modulated PA, i.e. A PAwith discrete supply modulation. The errors related to the CW design approach arequantified by comparison with dynamic measurements. Test-signals with equal powerdistributions but varying modulation bandwidths in a range of 4 MHz to 32 MHz areused. It is found that the dynamic measurement results deviate from the expectedCW performance by up to 5% in PAE and 1.5 dB in gain. Responsible for this are onone hand differences in CW and modulated gain. On the other hand the efficiencydegrades with increasing supply voltage switching frequency, which is related to themodulation bandwidth and the supply voltage levels.

S05.4: A Flexible, Dynamically Load-Modulated GaN Power Amplifier for theUHF bandKonstantinos Mimis1, Gavin Watkins1

1Toshiba Research Europe Ltd., United KingdomTime: 09:30–09:50A GaN power amplifier is presented with a tunable output matching network, basedon varactor diodes which provide a dual functionality. Firstly, they enhance back-offefficiency through dynamic load-modulation (between 0.9-1.0GHz). Secondly, they re-configure the amplifier to operate over additional frequencies (between 0.6-0.9GHz).The prototype PA measured with a 1.4MHz LTE signal, and after optimisation ofthe drain supply level, delivered 33.7-35.1dBm with 33.2-47.9% efficiency over 0.6-1.08GHz and <-28.2dBc ACPR, without any linearisation. Finally, output power controlis demonstrated through simple supply voltage scaling with high efficiency maintainedover a 10 dB output power dynamic range.


Ses

sion

s:Tu

esda

y

S06: MIMO Radar and SARRoom: HID, Chairs: Juergen Detlefsen, Wolfgang Menzel, Alberto Moreira, Lorenz-Peter

Schmidt, Christian Waldschmidt, Thomas Zwick 10:10–11:50

S06.1: MIRANDA 35 GHz SAR Based Change DetectionDenis Noetel1, Frank Kloeppel2, Stefan Sieger2, Daniel Janssen2, Nils Pohl21Fraunhofer-FHR, Germany; 2Fraunhofer FHR, GermanyTime: 10:10–10:30The presented MIRANDA 35 SAR sensor together with an ultralight aircraft allows forever higher revisit counts of test scenes. Seven sets of test data have been acquiredover a change detection scene, allowing for statistics-based change detection algo-rithms to be tested. Informational Difference and Universal Image Quality Index lendthemselves to change detection based on intensity images. We show here that bothmethods can result in successful change detection.

S06.2: A System Concept for a 3D Real-Time OFDM MIMO Radar for Flying Plat-formsAlexander Ganis1, Enric Miralles Navarro2, Christoph Heller3, Ulrich Prechtel1, VolkerZiegler2, Askold Meusling4, Heinz-Peter Feldle5, Mirko Loghi6, Frank Ellinger7

1Airbus Group Innovations, Germany; 2AIRBUS Group Innovations, Germany; 3EADSInnovation Works, Germany; 4Airbus Defence and Space, Germany; 5Airbus Defence& Space, Germany; 6University of Udine, Italy; 7Technische Universität Dresden, Ger-manyTime: 10:30–10:50In this paper a new system concept for a low cost, miniaturized and real-time imagingradar system for flying platforms is presented. The proposed solution is based onthe MIMO radar architecture, orthogonal signals for simultaneous transmit capabilitiesand highly integrated SiGe chipsets. Using beamforming techniques at the receivertogether with radar processing techniques, a 3D sensing of the range, azimuth, ele-vation and Doppler information for an arbitrary number of objects can be estimatedthrough a simultaneous transmission and with real-time hardware implementable FFTprocessing techniques. A top-level system concept and a complete parametrization isproposed for a radar system which is intended for obstacle warning for helicopters andto enhance flight safety in approach, landing and take-off phases of flight even in de-graded visual conditions. The full OFDM MIMO Radar system has been implemented


and tested in a MATLAB environment and simulation results are here presented. Thispaper is the first step towards the implementation of a compact and real-time radarsystem demonstrator.

S06.3: Ultra-High Resolution SAR in Lower Terahertz Domain for Applicationsin Mobile MappingStephan Palm1, Rainer Sommer2, Michael Caris3, Nils Pohl3, Axel Tessmann4, UweStilla5

1Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, Ger-many; 2Fraunhofer-FHR, Germany; 3Fraunhofer FHR, Germany; 4Fraunhofer IAF, Ger-many; 5Technische Universitaet Muenchen, GermanyTime: 10:50–11:10Mobile Mapping is currently dominated by optical camera or laser based systems. Dueto new semiconductor technologies, compact and light weight FMCW radar systemsin the lower terahertz domain become applicable for such scenarios. With constantincreasingly higher resolution capabilities in the subcentimeter domain such radarsensors could supplement existing sensor suites in challenging environments. Theirelectromagnetic waves exhibit only low absorption due to smoke, fog and dust andare independent from sunlight. Data were collected with the Miranda 300 GHz radarsystem in SAR mode with 30 GHz bandwidth mounted on a platform in a conventionalvan. Preliminary results from terahertz SAR data were processed using a time domainapproach finally reaching a 5 mm resolution. The SAR system’s ability of resolvingvery small metallic objects placed in the scenario was validated. Details in the SARimages are disclosed in unprecedented quality in terms of radar imaging. Objectsdown to a radar cross section of -43 dBsm could be resolved.

S06.4: 3D Radar Image Fusion using OFDM-based MIMO RadarBenjamin Nuss1, Leen Sit2, Thomas Zwick2

1Karlsruhe Institute of Technology, Germany; 2Karlsruhe Institute of Technology (KIT),GermanyTime: 11:10–11:30This paper presents two data fusion algorithms for use in an OFDM-based MIMO radarnetwork, comprising several radar nodes for area surveillance applications. Each node


Ses

sion

s:Tu

esda

y

is able to estimate four parameters - 3D positions (range, azimuth and elevation) aswell as the velocity of an arbitrary number of targets within one transmit cycle. Theraw radar images are then stitched together for higher target estimation accuracy aswell as to reveal targets that are hidden from certain nodes due to obstacle shadowing.The first algorithm estimates the 3D target position within the area of observation.The second estimates the 2D (azimuth and range) as well as the velocity parameters.The performance of the algorithms and the radar system is evaluated with numericalsimulations.

S06.5: Coherent Resampling for Coherent MIMO Radar SetupsAndreas Kirschner1, Juergen Detlefsen2, Wim Mees3

1Technische Universität München, Germany; 2Technische Universitaet Muenchen &Fachgebiet HFS, Germany; 3RMA, BelgiumTime: 11:30–11:50During the recent decade, coherent MIMO radar systems have been examined in-tensively. Although well proven conventional modulation schemes can be applied tocoherent MIMO radars, such as linear frequency modulation (LFM), the system imple-mentation, and therefore also the modulation, usually underlies errors such as non-linearities, phase noise etc. Nevertheless, the academic world in turn has developedmethods for calibration, correction and error prediction against corrupted radar signalmodulation. One of these methods is the so-called resampling method which hadbeen developed for correction of linear frequency modulation. However, the convolu-tion operation in coherent MIMO radars with collocated antennas incorporates anothergrade of complexity. This paper sketches the efforts needed, as well as results, for theresampling method applied to coherent MIMO radars with respect to maintenance ofcoherency between single MIMO channels.


S07: FilterRoom: HIC, Chairs: Fadhel Ghannouchi, Amelie Hagelauer, Jan Hesselbarth 10:10–11:50

S07.1: A New Compact Microstrip Slow Wave Open Loop Resonator Filter withImproved Spurious-Free BandPayman Rezaee1, Michael Höft21Christian-Albrechts-University of Kiel, Germany; 2University of Kiel, GermanyTime: 10:10–10:30In this paper, a new microstrip slow wave open loop resonator is proposed. This res-onator improves the spurious-free band up to 5.1 times of the fundamental frequencywhich is more than 2 times of the conventional slow wave open loop resonators. Basedon the proposed resonator, two three-pole filters are designed and one of them is fabri-cated. Simulation and measurement results are reported which are in good agreement.Designed filters provide 75% and 83% of footprint reduction in comparison with theconventional open loop resonator filters.

S07.2: Barium Hexaferrite Films Prepared by Means of the Sol-Gel Method forSelf-Biased Nonreciprocal Microwave DevicesFrauke Gellersen1, Felix Klichowski1, Adrian Rusche1, Arne Jacob1

1Technische Universität Hamburg-Harburg, GermanyTime: 10:30–10:50In this work barium hexaferrite films for self-biased nonreciprocal devices are producedby means of the sol-gel method. The effect of the drying temperature on the film sur-face is examined via scanning electron microscopy. The influence of the crystallizationtemperature and the composition of the precursors on secondary phases is analyzedvia X-ray diffraction analysis. Measurements of a coplanar waveguide with a bariumhexaferrite thin film show nonreciprocal behavior at the ferromagnetic resonant fre-quency in the Q-band without external biasing field.

S07.3: Design and Comparison of Various Coupled Line Tx-Filters for a Ku-BandBlock UpconverterDaniel Maassen1, Felix Rautschke1, Georg Boeck2

1Berlin Institute of Technology, Germany; 2TU Berlin, GermanyTime: 10:50–11:10In this contribution common coupled line filter topologies are developed for their ap-plication as Tx-filter in a Ku-band block upconverter (BUC) from 13.75 - 14.5 GHz.


Ses

sion

s:Tu

esda

y

Tough requirements of Rx-, LO- and second harmonic suppression were achieved bya detailed analysis of the metallic losses as well as equalizing even- and odd-modevelocities of the coupled line section. Four different filters were designed on an aluminasubstrate resulting in high measured performance values and small size comparedto other work. By using a hairpin topology a designed filter achieves a low insertionloss (IL) less than 1.5 dB, a return loss (RL) of better than 20 dB, for a 3 dB fractionalbandwidth (FBW) of 14.7 % while maintaining a second harmonic suppression of morethan 20 dB.

S07.4: Tunable Lumped-Element-Filter for RF Power Applications Based onPrinted FerroelectricsChristian Schuster1, Alex Wiens1, Christian Kohler2, Martin Schüßler1, JoachimBinder3, Rolf Jakoby4

1TU Darmstadt, Germany; 2Karlsruher Institut of Technology, Germany; 3KarlsruheInstitute of Technology, Germany; 4Institute for Microwave Engineering and Photonics,Technische Universität Darmstadt, GermanyTime: 11:10–11:30This work addresses center frequency and band-width tunable filter for implementationin RF base-station front-ends. The filter is fabricated using functional thick film layersof Barium-Strontium-Titanate (BST). The deposition of BST layers is performed locallyin a screen printing process. The fabricated varactors have a Q-factor around 40 at1 GHz, a tunability larger than 50% and a measured IP3 higher than 65 dBm. Thefilter is designed to cover typical GSM frequencies from 700 MHz to 960 MHz and60 MHz to 100 MHz bandwidth. The simulated insertion loss is around 2.2 dB and3.0 dB, depending on the center frequency and bandwidth. Measurements of the filterreveal an insertion loss of 6 dB to 9 dB which is at least 4 dB higher than predicted bysimulations. Analysis showed that the high insertion loss is caused by shifted poles asa consequence of the fabrication tolerances of the varactors.


S07.5: A 60MHz OTA-based IF Filter for Wireless Wake-Up Receivers with 115nsSettling TimeChristoph Tzschoppe1, Alexander Richter1, Markus Schulz2, Corrado Carta3, FrankEllinger1

1Technische Universität Dresden, Germany; 2TU Dresden, Germany; 3Dresden Uni-versity of Technology, GermanyTime: 11:30–11:50This paper presents the design and characterization of a fully-differential intermediatefrequency (IF) filter based on an operational transconductance amplifier (OTA) with6th order Butterworth bandpass characteristic. The designed 2-stage BiCMOS OTAcan be treated as an operational amplifier (OPAmp) together with its output resistance:the combination exhibits an open-loop voltage gain of 75dB and high gain-bandwidthproduct (GBP) of 5.8GHz, while stability is achieved with a worst case phase margin(PM) of 54[U+25E6] from a low bias-current of only 520µA. The multiple-feedback fil-ter (MFB) elements for the target Butterworth frequency response are determined withcircuit analysis based on an ideal OTA transfer function. The filter center frequency isset to 60MHz, whereby a measured -3dB-bandwidth of 16MHz is achieved. To enablethe operation within an on-time of 200ns the filter is able to settle at ±1dB of its steadystate amplitude in less than 115ns. The filter was fabricated in the IHP 130nm BiCMOStechnology and requires a current of only 1.6mA from a 2.5V-supply including all biascircuits.


Ses

sion

s:Tu

esda

y

S08: Radar Signal ProcessingRoom: HID, Chairs: Joachim Ender, Thomas Fickenscher, Alexander Koelpin, Mario Pauli

14:00–15:40

S08.1: Detection of Fluid Vortices based on Compensated FMCW-Radar PhaseMeasurementsBirk Hattenhorst1, Christoph Baer2, Thomas Musch3

1Ruhr-University Bochum, Germany; 2Ruhr-Universität Bochum & Institute of Elec-tronic Circuits, Germany; 3Ruhr-Universität Bochum, GermanyTime: 14:00–14:20In this contribution, a measurement concept for the detection of fluid vortices is pre-sented. The approach utilizes the pressure-dependent relative permittivity of gases,which connected to the pressure distribution of a gas vortex leads to a detectablepermittivity deviation. Since the measurement effect is very small, phase measure-ments of a high precise and low jitter FMCW-radar system are applied. Moreover,disturbances caused by vibrations of the measurement setup are compensated out ofthe measurement signal.

S08.2: A Super-Resolution Polarimetric Direct Mapping Imaging Algorithm for aBistatic UWB-RadarDilyan Damyanov1, Rahmi Salman2, Thorsten Schultze3, Ingolf Willms4

1University of Duisburg-Essen, Germany; 2HF Systems Engineering GmbH & Co.KG & Hübner Holding GmbH, Germany; 3Universität Duisburg-Essen, Germany;4University Duisburg-Essen, GermanyTime: 14:20–14:40In this paper a real time capable 2D imaging method for ultra-wideband Radar is pre-sented. A well known wavefront localization method based is adapted and improvedusing a super-resolution wavefront extraction method and exploring the polarimetricinformation of the target under test. The imaging algorithm is real time capable anddirectly maps an extracted wavefront to the target contour in contrast to classicalpopular migration algorithms. Furthermore, the new proposed imaging algorithm isdesigned for a circular scanning trajectory, or a rotating target and a bi-static antennaconfiguration with two receiver antennas. Experimental validations are performed witha geometrically complex object, a M-sequence UWB Radar device (4.5 GHz - 13.5GHz) and compact Vivaldi Ultra-Wideband antennas.


S08.3: Multi-Spectral Echo Signal Processing for Improved Detection and Clas-sification of Radar TargetsMichael Vogt1, Thorsten Neumann2, Michael Gerding2, Christoph Dahl2, Ilona Rolfes3

1Ruhr-University Bochum & High Frequency Engineering Research Group, Germany;2Ruhr-University Bochum, Germany; 3Ruhr-Universität Bochum, GermanyTime: 14:40–15:00A major challenge in radar based remote sensing and imaging is to identify and todetect radar targets, and also to accurately determine their locations and sizes. Thisespecially applies in the case of multiple, spatially distributed radar targets, as for ex-ample in radar imaging, automotive radars, and others. Previously, we have proposeda concept for multi-spectral analysis and processing of echo signals for radar level mea-surement of bulk solids in silos using a spatially fixed antenna beam. This approachhas now also been utilized for scanning radar applications. The basic technique is tofilter the radar echo signals in multiple frequency sub-bands and to incoherently com-bine the filtered signals. Furthermore, the variance of envelope signals is analyzed inorder to allow for a differentiation between echoes from distributed, randomly arrangedscatterers and from spatially isolated single scatterers. The mean over the standarddeviation of the envelope signals obtained from the different sub-bands is suggestedto be used as an amplitude-invariant parameter for the classification of radar targets.Results of an experimental evaluation of the concept using a mechanically scanning75 to 80 GHz Frequency Modulated Continuous Wave (FMCW) radar system arepresented. It will be shown that the proposed technique enables to largely suppressthe echo signal fluctuations, which are given in scenarios of spatially distributed radartargets, and also to distinguish between different kinds of radar targets.

S08.4: Radar Array Self-Calibration and Imaging with Applications to Bulk Ma-terial GaugingDominik Zankl1, Stefan Schuster2, Reinhard Feger1, Andreas Stelzer3

1Johannes Kepler University Linz, Austria; 2Voestalpine GmbH & Institute for Commu-nications and Information Engineering, Austria; 3Johannes Kepler University of Linz,AustriaTime: 15:00–15:20Common algorithms for radar array imaging rely on sufficiently precise calibrationbefore evaluation. A system calibration is necessary to compensate potential unavoid-


Ses

sion

s:Tu

esda

y

able error sources that decrease the accuracy and reliability of the estimates andworsen the beam pattern of the antenna array. Several calibration methods have beendeveloped, most of them are based on a-priori, i.e., offline measurements with a welldefined target scenario. In this paper we present an algorithm that is capable of ex-ecuting an online self-calibration and image formation for the special case when thetarget scenario is an arbitrary but continuous surface. The two separated tasks, sys-tem calibration followed by image formation, are combined in a single formulationthat efficiently solves a minimization problem. Thus, the need for a-priori calibrationmeasurements is avoided. The correct functionality of this algorithm is shown withsimulation results for different surface scenarios and spatial dimensions. A possiblereal-world application in blast furnace burden surface imaging is discussed.

S08.5: Range Migration Compensation for Chirp-Sequence based RadarFabian Roos1, Daniel Ellenrieder1, Nils Appenrodt2, Juergen Dickmann3, ChristianWaldschmidt11University of Ulm, Germany; 2DAIMLER AG, Germany; 3Daimler AG, GermanyTime: 15:20–15:40To improve the range and Doppler resolution the bandwidth and the observation timeneed to be increased. This leads to a range migration effect and thus to a decliningseparability of targets. This paper compares three different modulation formats to copewith the range migration. The standard chirp-sequence modulation, the bandwidth vari-ation modulation known from literature, and the proposed chirp duration variation areanalysed. A simulation is used to validate the modulation format.


S09: Steerable AntennasRoom: HIC, Chairs: Matthias Hein, Peter Knott 14:00–15:40

S09.1: An Electronically Reconfigurable Reflectarray Element Based on BinaryPhase Shifters for K-Band ApplicationsHelen Theissen1, Christoph Dahl2, Ilona Rolfes3, Thomas Musch3

1Ruhr University Bochum, Germany; 2Ruhr-University Bochum, Germany; 3Ruhr-Universität Bochum, GermanyTime: 14:00–14:20A reflectarray concept which allows electronic beamsteering by using a binary phaseapproximation is presented. The proposed antenna element works at 24 GHz and iscomprised of an aperture-coupled patch antenna with an open-ended microstrip lineon the backside to obtain the proper phase distribution on the reflectarray aperture.Electronic beamsteering is achieved by applying PIN diodes on the individual reflectar-ray elements. To simplify the control process of the antenna, the elements function asone-bit phase shifters either reflecting with a 0° or 180° phase shift. The reflectarrayelement is verified by measurements obtained with a prototype in a waveguide simu-lator setup.

S09.2: A Frequency Steerable Substrate-Integrated Waveguide Slot Antenna for77 GHz Radar ApplicationTim Martin Böbel1, Thomas Dallmann2, Matthias Rabel3, Dirk Heberling2

1RWTH Aachen, Germany; 2RWTH Aachen University, Germany; 3Indurad GmbH,GermanyTime: 14:20–14:40For a low cost radar system a serially fed, linear and equidistant waveguide slot an-tenna has been developed. A meander shaped waveguide path allows a frequencysteerable main lobe without additional mechanical or electrical components. The an-tenna design focused on a maximum steering angle of ±60°. In order to further reducethe costs and simplify fabrication of the antenna a Substrate-Integrated Waveguide(SIW) structure was used. A new concept to reduce the parasitic coupling of thesestructures has been investigated. To fulfill the requirements on the radiation character-istics and matching of the antenna, a new slot shape and a cavity based waveguide-SIW transition were designed. Simulations and measurement results show that theantenna could be realized successfully.


Ses

sion

s:Tu

esda

y

S09.3: Steerable Ka-Band Dual Reflector AntennaTatjana Gabriel1, Horst Kozilek1, Christian Hartwanger2, Marko Gerhard1, MichaelSchneider1

1Airbus DS GmbH, Germany; 2EADS Astrium GmbH, GermanyTime: 14:40–15:00Airbus DS GmbH has been developed a Ka-band antenna assembly which offers steer-able up- / downlink connections (rx, tx) for satellites in LEO. The antenna consists ofa dual reflector antenna and a mechanical steering mechanism. The pointing mecha-nism comprises the steering unit, a standardised azimuth stage and an elevation stagewhich is custom-made. The Ka-band antenna assembly (KAA) is part of the AntennaPointing Assembly (APA) product family by Airbus DS GmbH. The steerable antennasystem KAA was completely developed in Germany and is not subject to ITAR. Theantenna has to fulfill strict requirements concerning gain, sidelobes and polarisationpurity and the agile steering mechanism needs a highly stable and symmetric struc-ture of the antenna. Therefore the antenna is designed as a centre-fed dual reflectorantenna. The engineering model is ready for qualification. The antenna was optimisedby means of a hybrid approach and different calculation techniques.

S09.4: Modular Steerable Active Phased Array Antenna at 2.4 GHzNiels Neumann1, Christoph Hammerschmidt2, Martin Laabs3, Dirk Plettemeier3

1Technische Universität Dresden, Germany; 2BIOTRONIK GmbH SE & Co. KG, Ger-many; 3Dresden University of Technology, GermanyTime: 15:00–15:20Phased array antennas can cover a wide range of applications, e.g. localizing passivetags. Depending on the specifications for antenna gain, beam width and scanningrange, different types and numbers of antenna elements are required. This kind offlexibility is provided by a customizable approach consisting of a control module andbackplanes that carry RF and antenna modules where amplitude and phase shift-ing needed for beamforming takes place. Furthermore, an initial calibration of theantenna has to be carried out in order to compensate for tolerances in the manu-facturing process. In this paper, a 4x4 array is realized and presented which allowsfull 2D beamsteering. Comprehensive measurement results are shown and discussed.


S09.5: 200 GHz 1×4 Antenna Array Based on Planar Butler MatrixMichael Jenning1, Dirk Plettemeier2

1Technische Universität Dresden, Germany; 2Dresden University of Technology, Ger-manyTime: 15:20–15:40We present a fully planar Butler Matrix (BM) design for 180 GHz operational frequencyand a bandwidth of better than 30 GHz. The most important component in such adesign is the planar crossover, which is investigated and optimized. Furthermore, twoantenna elements are investigated and optimized to work in conjunction with the BMto form the antenna array. Simulations reveal that one of the arrays is able to providebetter than 10 dB gain for all frequencies and beams.


Ses

sion

s:Tu

esda

y

S10: Integrated CircuitsRoom: HID, Chairs: Dietmar Kissinger, Hermann Schumacher 16:00–17:40

S10.1: 10 to 40 GHz Superheterodyne Receiver Frontend in 0.13 µm SiGe BiC-MOS TechnologyHebat-Allah Abdeen1, Shuai Yuan1, Hermann Schumacher2, Volker Ziegler3, AskoldMeusling4, Heinz-Peter Feldle5

1Ulm University, Germany; 2Universität Ulm, Germany; 3AIRBUS Group Innovations,Germany; 4Airbus Defence and Space, Germany; 5Airbus Defence & Space, GermanyTime: 16:00–16:20A fully integrated 10-40 GHz superheterodyne receiver frontend using a 40-46 GHz IFis presented. The frontend consists of a differential low noise amplifier, a fully differen-tial mixer, a single-ended frequency quadrupler and a transformerbased balun followedby an amplifier to convert the quadrupler’s single-ended output to a differential signalto drive the LO port of the mixer. The circuit is designed and fabricated in a 250 GHz fTSiGe BiCMOS technology. The chip was characterized on-wafer single-endedly. Thefrontend achieves a differential conversion gain of 17 to 20 dB and an input-referred 1dB compression point of -16 to -20 dBm across the desired IF bandwidth.

S10.2: An OOK-Modulator at 240 GHz with 20 GHz BandwidthPedro Rodriguez-Vazquez1, Neelanjan Sarmah2, Klaus Aufinger3, Ullrich Pfeiffer2

1Bergische Uuniversität Wwuppertal, Germany; 2University of Wuppertal, Germany;3Infineon Technologies AG, GermanyTime: 16:20–16:40In this paper, we present an OOK-modulator with a LO at 240 GHz for incoherenthigh data rate communication systems. The modulator topology is similar to a selectorwhere one of the data input is connected to the ground and the baseband signal is fedto the clock input. This circuit is implemented in 130 nm SiGe HBT technology with fT/fmax of 250/370 GHz. The measured 3 dB RF bandwidth is 20 GHz and the estimateddata rate with OOK modulation scheme is 13.3 Gbps. The dc power consumption forthe modulator is 30 mW


S10.3: Low power High-speed 10 Gb/s 4:1 Multiplexer for Sliding-IF digital Cen-tric Transmitter in 65nm CMOSPierre Bousseaud1, Renato Negra1

1RWTH Aachen University, GermanyTime: 16:40–17:00This paper presents a high speed 4:1 multiplexer (MUX) which can operate up to10 Gb/s. The circuit adopts a simple transmission gate (TG) structure for low powerconsumption and saving area as well. It is dedicated to be employed into a sliding-IFtransmitter architecture and acts as a digital multiplier in order to convert I/Q base-band data into a digital serial data stream before being up-converted into the analogdomain through a radio-frequency digital-to-analog-converter (RF-DAC). In order toavoid glitches due to clock desynchronization, a 4-bit selectable delay-cell array isused for proper alignment configuration. The simulation results after post-layout ex-traction show a power consumption less than 5 mW under a 1.2 V supply voltage. Thecircuit has been designed in 65nm TSMC CMOS technology.

S10.4: Hybrid-Integrated RF MEMS-based Reference Oscillator Using a Silicon-Ceramic Composite SubstrateJohannes Stegner1, Uwe Stehr1, Dmitry Podoskin2, Sebastian Gropp2, MichaelFischer2, Martin Hoffmann3, Jens Müller2, Matthias Hein2

1Technische Universität Ilmenau, Germany; 2Ilmenau University of Technology, Ger-many; 3Technische Universitaet Ilmenau, GermanyTime: 17:00–17:20In this paper, the design of a RF MEMS oscillator on a silicon-ceramic compositesubstrate using a high-Q Lamb-wave resonator as frequency-selective device is de-scribed. The MEMS resonator is designed on a 1.8 um thick piezoelectric AlN layer,deposited on silicon using thin-film processes. The finite-element simulation results ofthe resonator structure are presented, and the derivation of the electrical equivalent-circuit is described. The active part of the MEMS oscillator, which was laid out ina Pierce topology, has been integrated in an application-specific integrated circuitfabricated in CMOS technology. Both, amplifying and frequency-selective parts arehybrid-integrated on a unique silicon-ceramic composite substrate, which enables avery compact high-quality module design with minimal parasitics. The MEMS oscillatorserves as a technology demonstrator combining the advantages of microelectronic


Ses

sion

s:Tu

esda

y

and microelectromechanical components towards a compact and power-efficient hy-brid technology, e.g. for mobile communications or wireless sensors.

S10.5: Integrated Tri-State PLL for the Control of a Switched Injection-LockedOscillator at 2.45GHzMarkus Schulz1, Niko Joram2, Mohammed El-Shennawy1, Christoph Tzschoppe2,Frank Ellinger2

1TU Dresden, Germany; 2Technische Universität Dresden, GermanyTime: 17:20–17:40This paper presents a novel combination of two fully integrated phase-locked loops(PLLs) to control the oscillation frequency and modulation frequency of a switchedinjection- locked oscillator (SILO). The SILO is used as an active reflector transponderin a frequency-modulated continuous wave (FMCW) radar system. A fractional-N PLL(RF-PLL) with a tri-state phase-frequency detector (TSPFD) sets the oscillation fre-quency of the voltage controlled oscillator (VCO) to 2.45GHz. Another integer-N PLL(modulation PLL) switches the tail current source of the VCO to achieve SILO behaviorat the time when the RF-PLL is not controlling the VCO. The RF-PLL supports divisionratios from 64 to 511 with a frequency resolution of 0.2Hz. Reference spur levels arebelow -48dBc while the out- of-band phase noise is -103dBc/Hz at a 1MHz frequencyoffset. The modulation PLL is based on a Maneatis-cell ring-oscillator supporting mod-ulation frequencies between 6MHz and 20MHz. Furthermore, the duty cycle of themodulation signal can be set in steps of 0.8%. Due to the novel TSPFD, the oscillationfrequency of the SILO changes only by 36MHz within 10 minutes when the RF-PLL isinactive. The complete circuit is manufactured in a 180nm SiGe BiCMOS process andconsumes a total power of 128mW.


S11: Microwave TubesRoom: HIC, None 16:00–17:40

S11.1: Design Procedure for Hot-Matched Severs in Folded-WaveguideTraveling-Wave TubesSascha Meyne1, Djamschid Safi1, Arne Jacob2

1TUHH, Germany; 2Technische Universität Hamburg-Harburg, GermanyTime: 16:00–16:20A design procedure for a hot-matched sever for folded-waveguide traveling-wave tubes(FW-TWTs) is proposed. To determine a starting point for a suitable load design, arealistic three-dimensional sever structure is developed using equivalent circuits andsubsequent particle-free (cold) full-wave simulation. Additional wave impedance in-formation, obtained by a small-signal eigenvalue analysis, is used to improve the ter-mination for hot operation. The final full-wave optimization is then performed in thepresence of the electron beam with only moderate computational effort. This proce-dure is applied to develop a sever structure for a given frequency point at Q-band. Thesimulated results support the approach.

S11.2: Preliminary Studies on Multistage Depressed Collectors for Fusion Gy-rotronsChuanren Wu1, Ioannis Pagonakis2, Stefan Illy2, Manfred Thumm1, Gerd Gantenbein1,John Jelonnek1

1Karlsruhe Institute of Technology, Germany; 2Karlsruhe Institute of Technology (KIT),GermanyTime: 16:20–16:40Fusion gyrotrons are high-power microwave sources which are capable to generateRF power in the MW range at millimeter wave and sub-THz frequencies. Today, typi-cally around 35% electronic efficiency is achieved in the energy transfer (interaction)from the electron beam to the electromagnetic field. Using a single-stage depressedcollector (SDC), the overall efficiency of a gyrotron can be increased to around 50%as planned for ITER. To achieve higher total efficiencies, so-called Multi-stage De-pressed Collectors (MDC) need to be introduced. MDCs offer the possibility to sort theelectrons by their energy more accurately and to guide the electrons to electrodes onproper voltages. However, the application of the MDC concept to gyrotron is nontrivial.That is due to the small-orbit hollow electron beam, the large variation in energy of the


Ses

sion

s:Tu

esda

y

spent beam at the collector entrance and the existence of a relatively strong magneticfield at the collector region, which dominantly constrains and guides the electron beam.According to Busch’s theorem, if both electric and magnetic field components are axi-ally symmetric, the cyclotron motion of the electrons cannot be spatially separated. Forthis case, a new approach for MDC, based on a spatial trajectory modulation causedby non-adiabatic transition is proposed. A design proposal for a two-stage collectoris presented which shows 73% collector efficiency which is already close to the the-oretical limit for a two-stage collector. Besides, the MDC has the advantage that thecollector wall loading is sufficiently low, thus electron beam sweeping is not necessary.

S11.3: Experimental Results and Outlook of the 2 MW 170 GHz Coaxial-CavityGyrotron towards Long Pulse OperationSebastian Ruess1, Tomasz Rzesnicki2, Ioannis Pagonakis2, Thorsten Kobarg1, Maxi-milian Fuchs1, Gerd Gantenbein3, Stefan Illy2, Manfred Thumm3, John Jelonnek3

1Karlsruher Institute of Technology, Germany; 2Karlsruhe Institute of Technology (KIT),Germany; 3Karlsruhe Institute of Technology, GermanyTime: 16:40–17:00The development of the modular short-pulse pre-prototype as base for a 2 MW, 170GHz, CW coaxial-cavity gyrotron as upgrade for the international fusion project ITERand beyond is in progress at Karlsruhe Institute of Technology (KIT). The current mod-ular pre-prototype configuration allows the generation of > 2 MW RF output powerin short-pulses with a reasonable electronic efficiency of approximately 30 % withoutdepressed collector operation. Recently, experiments with a new Glidcop resonatorhave been performed. In single-stage depressed operation the overall efficiency ofthe gyrotron has been increased to ~48 %. In addition, an advanced water coolingsystem for a long pulse 2 MW gyrotron was developed. In this paper the experimentalresults, the suppression of the beam-halo and future plans for the 2 MW gyrotron willbe presented.


S11.4: Nose-Cone Loaded Folded-Waveguide Delay Lines for Q-Band Traveling-Wave TubesSascha Meyne1, Philip Birtel2, Arne Jacob3

1TUHH, Germany; 2Thales Electronic Systems, Ulm, Germany; 3Technische Univer-sität Hamburg-Harburg, GermanyTime: 17:00–17:20A modified folded-waveguide (FW) delay line for traveling-wave tubes (TWTs) is pro-posed. The amplifier performance is assessed by full-wave and interaction simulation.Properly designed nose cones are shown to enhance the beam-wave coupling. This,in turn, improves the amplifier gain, a weak point of conventional FW-TWTs. Also theachievable beam efficiency is increased without sacrificing too much bandwidth.

S11.5: A Fast Frequency Step-tunable 236 GHz Gyrotron Design for DEMOParth Kalaria1, Konstantinos Avramidis2, Joachim Franck2, Gerd Gantenbein1, StefanIlly2, Ioannis Pagonakis2, Manfred Thumm1, John Jelonnek1

1Karlsruhe Institute of Technology, Germany; 2Karlsruhe Institute of Technology (KIT),GermanyTime: 17:20–17:40As part of EUROfusion WP HCD EC project, the conceptual design of a 1 MW, 236GHz hollow cavity gyrotron is ongoing at IHM, KIT for a DEMOnstration Power Plant(DEMO), along with the 2 MW coaxial cavity design concept. Fast-frequency tunablegyrotrons (tuning within a few seconds) are recommended for plasma stabilizationusing a fixed, nonmovable antenna. Here, the mode selection approach for such a fre-quency tunable gyrotron is presented and suitable operating modes for fast-frequencytunability is suggested. Magnetic field tuning has been confirmed as an effective tech-nique to tune the gyrotron operating frequency. The step tunability of the 236 GHzgyrotron within the frequency range of ±10 GHz is theoretically demonstrated in stepsof 2-3 GHz.


Ses

sion

s:Tu

esda

y

SP3: Special Session - Radar SystemsRoom: ID 04/445, Chairs: Madhukar Chandra, Dirk Fischer 16:00–17:20

SP3.1: On the verification of the quantitative precipitation estimation based onquality assured polarimetric weather radar measurements at DWDPatrick Tracksdorf11DWD, GermanyTime: 16:00–16:20For some time past weather radar measurements with high temporal- and spatialresolution represent the basic element for severe weather nowcasting, short term fore-casting and warning management processes within the weather services. Thereby,the radar based quantitative precipitation estimation (QPE) is a very essential anduseful input to the meteorologists, hydrologists and modellers. Having replaced almostall weather radar systems with modern polarimetric Doppler C-Band weather radarsystems the Deutscher Wetterdienst (DWD) may now make use of the improved radarsystem sensitivity and, above all, the newly available polarimetric weather radar mea-surements. This contribution will describe the developments which aim to improve theoperational procedure for the QPE at DWD. Especially, the realisation of the QPE pro-cedure, which incorporates the utilisation of a preceding quality assurance of the radarmeasurements and a hydrometeor classification, will be presented. The verificationprocedure, which is necessary and crucial when attempting to use the developmentsin an operational environment, will be addressed in detail. A short outlook concerningnecessary further developments closes this contribution.

SP3.2: Implementation and verification of hydrometeor classification for Ger-man weather radar networkJörg Steinert1, Patrick Tracksdorf11DWD, GermanyTime: 16:20–16:40The German national weather service DWD maintains a C-band radar network includ-ing 17 weather radar systems operated on a 24/7 base and one system for research.Beside the replacement of the hardware to get dual polarisation capability, an algorithmfor the estimation of the hydrometeor class was established among others. Notwith-


standing, the advanced radar measurements like ZDR, KDP and RHOhv deliver furthercharacteristics of the ensemble of hydrometeors, additional input of the temperatureis suggested to improve the hydrometeor classification. For this purpose, the resultsof the numerical weather prediction model give valuable information about the heightof the 0°C isotherm and the snowfall limit. Apart from the implementation in an op-erational software environment, the validity of the designated hydrometeor type hasto be proven. Concerning this, established point measurement devices like opticaldisdrometers are chosen for indicating the ground truth. After a short summary aboutthe weather radar systems and the optical disdrometers, a brief outline of the hydrom-eteor classification algorithm is given, highlighted by a case study. In the following, theverification outcomes will lead to the conclusions of this study.

SP3.3: Demonstration of Simultaneous Quad-Polarization SAR Imaging for Ex-tended Targets in MIMO-SARTobias Rommel1, Marwan Younis1, Gerhard Krieger1

1German Aerospace Center (DLR), GermanyTime: 16:40–17:00Due to a high demand for global Synthetic Aperture Radar (SAR) data sets, recentspaceborne sensors reach their limits in terms of resolution, swath width and repeatcycle. In addition, fully polarimetric operation reduces the maximum swath width ap-proximately by the factor of two. To solve SAR inherent limitations, a new generationof sensors with multiple transmit and multiple receive channels (MIMO) and digitalbeam-forming (DBF) capabilities is suggested. Using a quad-polarized MIMO-SAR,transmitting simultaneously orthogonal waveforms in horizontal and vertical polariza-tions, enables data acquisitions without any reduction of the swath width or resolution.In this paper a concept is described, which uses an advanced filtering and processingmethod to separate the transmitted signals in the receiver and to measure all fourparameters of the scattering matrix simultaneously. Ground-based MIMO-SAR mea-surement results are presented, which serve as a first verification of the suggestedtechnique with an extended, non point-like target.


Ses

sion

s:Tu

esda

y

SP3.4: Investigation of polarimetric multiparameter intrapulse modulation forradar applications and its impact on the detection capabilitiesIngo Klein1, Dirk Fischer2

1University of Applied Sciences, Germany; 2Münster University of Applied Sciences,GermanyTime: 17:00–17:20This paper describes the software-defined polarimetric transmitting-pulse generationand receive-signal evaluation of the Digital Beamforming Weather Radar (DBWR),which is currently being developed at the Münster University of Applied Science. Thebasic architecture of the DBWR, its signal paths and signal processing, as well as thepolarimetric multiparameter intrapulse modulation-techniques of the transmitting-pulseand the possibilities to evaluate the received signal are presented. Particular attentionis paid to the impact of the different intrapulse modulations on the detection capabilities.The possibilities of modulation includes the intrapulse modulation of the amplitude,frequency, phase and polarization, defined by several arbitrary functions. The modula-tion of the polarization is defined by the parameters of the polarization ellipse and canbe tuned within the transmitting pulse. All modulations can be defined and specifiedin software, to generate the complete transmitting-pulse in the simple form of a lookup table (LUT) which can be transmitted in the signal-processing unit of a SoC-BasedFPGA. The signal processor is responsible for the subsequent processing, the imple-mentation of the phased-array functionalities and the output of the transmitting-signalat an intermediate frequency of 44 MHz. By mixing the generated signal with a directdigital synthesis (DDS) signal in a FPGA which is variable in phase and amplitude, itis possible to implement and calibrate the phased-array functionality without any influ-ences on the modulation. The successive RF-Front-End is responsible for the up- anddown-conversion, filtering and amplification of the X-Band-Radar frequencies (9470MHz). The raw data of the received signal can be returned to software. With the knownmodulation and the phase-/amplitude-offsets of the mixed signal, the evaluation of itcan be done in various ways to determine the most effective algorithm for the singlereceive-signal parameters. Every receive signal can be related to a reference shapeof the transmitting pulse in order to find a common measure of comparison.



Ses

sion

s:W

edne

sday

Wednesday, 16 March 2016

S12: Radar and TDR SystemsRoom: HID, Chairs: Juergen Hasch, Christoph Scheytt, Stephan Stanko 08:30–10:10

S12.1: Determining Linearity of Wideband FMCW-Systems Based on Low-CostSix-Port TechnologySascha Wibbing1, Fabian Lurz2, Sebastian Mann2, Stefan Lindner2, Sarah Linz2,Robert Weigel3, Alexander Koelpin4

1Institute for Electronics Engineering, University of Erlangen-Nuremberg, Germany;2University of Erlangen-Nuremberg, Germany; 3University of Erlangen-Nuremberg &Eesy-id, Germany; 4University of Erlangen-Nuremberg & Institute f. Electronics Engi-neering, GermanyTime: 08:30–08:50This paper describes a new method for high accuracy determination of instantaneousfrequency and linearity of frequency modulated continuous wave systems. The pre-sented setup reduces the frequency measurement to a phase measurement based onSix-Port interferometer with a delay line. To extend the range of possible input frequen-cies and power levels, a calibration method and the appropriate correction algorithm isintroduced. Evaluation of linearity and frequency of the input signal is obtained withoutthe use of computationally intensive Fourier transform which allows the signal process-ing based on low-cost micro-controllers.

S12.2: Spectral Properties of Time Domain Reflectometry SystemsRobert Storch1, Michael Gerding2

1Krohne Innovation GmbH, Germany; 2Krohne Messtechnik GmbH, GermanyTime: 08:50–09:10Time domain reflectometry (TDR) systems are widely used to perform accurate dis-tance measurements. The crucial component that determines accuracy and repeata-bility within these systems is the timebase. For an optimal design it is mandatory tohave a precise knowledge about the impact of errors within the timebase on the mea-surement result. Besides the influence of stochastic errors this paper mainly dealswith the analysis of deterministic errors. A mathematical model will be derived whichcan be used to optimize timebases only by means of the spectral properties of thesignals. This model is compared to measurement results verifying the usefulness ofthe approach.


S12.3: A Compact, Energy-Efficient 240 GHz FMCW Radar Sensor with HighModulation BandwidthSven Thomas1, Christian Bredendiek2, Timo Jaeschke3, Florian Vogelsang2, Nils Pohl11Fraunhofer FHR, Germany; 2Ruhr-Universität Bochum, Germany; 3Ruhr-UniversityBochum, GermanyTime: 09:10–09:30In this paper a highly integrated and compactly built FMCW radar system working ata center frequency of up to 240 GHz is presented. With an ultra wide tuning rangeof 40~GHz a range resolution down to 3.75 mm based on a -6 dB width of the targetpeak can be achieved, which enables this radar system for various high precisiondistance measurement and high resolution imaging applications. With the use of ahighly integrated system architecture and on-chip antennas based on a single MMICin combination with a PTFE lens antenna system, a very robust and compact realiza-tion is possible. Due to the full integration of all high frequency components, an opencavity QFN package can be used to mount the MMIC on a cost effective and easy-to-fabricate FR4 substrate, which also allows for quick and easy rework processes orchip replacements. The low power consumption of 3.5 W at a supply voltage of 5 Vin addition to the compact, cost effective realization and the high resolution make thisradar suitable for industrial applications.

S12.4: An Ultra-Wideband Time Domain Reflectometry Chipless RFID Systemwith Higher Order Modulation SchemesMaximilian Poepperl1, Christian Mandel2, Martin Vossiek3, Christian Carlowitz3, RolfJakoby4

1Friedrich-Alexander-University Erlangen-Nürnberg, Germany; 2Technische Univer-sität Darmstadt, Germany; 3University of Erlangen-Nuremberg, Germany; 4Institutefor Microwave Engineering and Photonics, Technische Universität Darmstadt, Ger-manyTime: 09:30–09:50This paper presents a low-cost, low-complexity FMCW-based ultra-wideband (UWB)chipless time domain reflectometry (TDR) radio frequency identification (RFID) sys-tem, which is suitable for implementing higher order modulation schemes. Higher ordermodulation significantly increases the information content in chipless RFID. The appli-cability of phase-shift keying (PSK) and pulse-position modulation (PPM) to chipless


Ses

sion

s:W

edne

sday

TDR RFID leads us to introduce an 8-PSK and an 8-PSK-and-2-PPM combination.The overall data capacity is increased to 16 bits compared to low-order modulationschemes, for example, on-off keying, which achieve only 4 bits. The tag, which is basedon a meandered transmission line, can be printed cheaply as it consists solely of micro-strip structures. We built an appropriate interrogation unit since the achievable storagedensity of a chipless RFID tag greatly depends on the reader architecture and perfor-mance as well. The reader features a bandwidth of 1.25 GHz at a center frequency of7.825 GHz, which allows for maximal power to meet most countries’ UWB regulations.The reader’s interrogation signal is a frequency-modulated continuous-wave (FMCW)signal generated by a voltage-controlled oscillator (VCO) that is stabilized by a phase-locked loop (PLL). With this setup the interrogation-unit build is inexpensive. As thereader as well as the tag impact the information content, the complete RFID systemneeds to be investigated. In addition to a detailed description of both system parts,tests demonstrate the performance of the TDR RFID systems.

S12.5: Crystal Oscillator Frequency Offset Compensation for Accurate FMCWRadar RangingBelal Al-Qudsi1, Mohammed El-Shennawy1, Niko Joram2, Frank Ellinger2

1TU Dresden, Germany; 2Technische Universität Dresden, GermanyTime: 09:50–10:10Accurate ranging and positioning systems encounter several practical limitations. Crys-tal oscillator (XO) tolerance is a major challenge that impairs the accuracy of thesesystems. Two-way ranging with frequency modulated continues wave (FMCW) radarsin particular are more influenced by XO tolerance as compared to primary FMCWradars. So this work focuses on the measurement and compensation of the relativefrequency offsets between the different XOs in FMCW radar systems in order to im-prove their ranging accuracy. With a two-way ranging synchronization protocol, a ±1part per million (ppm) relative XO frequency offset may translate to ranging errors inthe range of ±1.2 m. In this work, a three-way ranging synchronization protocol isproposed to compensate for the relative XO offset. The approach was tested in a prac-tical ranging setup. Compared to the conventional two-way ranging synchronizationprotocol, the ranging precision was enhanced by a factor of around 2.


S13: Electromagnetic EngineeringRoom: HIC, Chairs: John Jelonnek, Dirk Manteuffel, Thorsten Schrader 08:30–10:10

S13.1: Probe-Receiver Coupling in External Calibration SystemsNhat Pham1, Arne Jacob2, Ridvan Akpinar1

1TU Hamburg-Harburg, Germany; 2Technische Universität Hamburg-Harburg, Ger-manyTime: 08:30–08:50On-line calibration systems with near-field probes are an attractive approach for large-size DBF arrays. In order to improve the calibration accuracy, a model of the couplingbetween the receiver patch and the calibration monopole probe is developed furtherin this contribution. A Fourier-based approximation of the radiation characteristic ofthe patch is proposed as a compromise between accuracy and computational effort.A planar array is built to validate the proposed concept. A phase error of 1.5° and anamplitude deviation of 0.8 dB are achieved in the experiments.

S13.2: Side-lobe Reduction of Horn Antenna Using Circular Patch Mushroom-Like EBG StructureTanan Hongnara1, Korbinian Schraml2, Sarawuth Chaimool3, Prayoot Akkaraekthalin4,Dirk Heberling2

1King Mongkut’s University of Technology North Bangkok, Bangkok, Germany; 2RWTHAachen University, Germany; 3Udon Thani Rajabhat University, Udon Thani, Germany;4King Mongkut’s University of Technology North Bangkok, ThailandTime: 08:50–09:10This paper presents an reconfigured horn antenna for side-lobe reduction by usingan electromagnetic band gap (EBG) structure. A mushroom-like structure as unit cellis used and designed to achieve completely EBG with circular shape resonator. It islined on two wall sides in the E-plane of the conventional horn antenna. Obviously, theEBG surface can suppress and obstruct surface waves on the metallic plate of hornantenna, resulting in side-lobe suppression over the designed EBG. In addition, theproposed antenna can be suitable for high power systems due to a purely metallicconstruction in EBG surface.


Ses

sion

s:W

edne

sday

S13.3: Far Field Analysis of Wrinkles in Space Membrane AntennasRalf Wilke1, Korbinian Schraml1, Dirk Heberling1

1RWTH Aachen University, GermanyTime: 09:10–09:30Large deployable antennas (LDA) are an upcoming technique used as space bornereflector antennas. Low stow volume and mass are one of the key advantages allowingbig reflector diameters to be launch on conventional vehicles. A primary concern inreflector antenna building is surface accuracy, especially at high operating frequencies.Conventional LDA use sophisticated high cost mechanics to deploy a mesh structurewith low surface error. But deployable structures are also used as a drag sail to deorbitsatellites when their live time is exceeded. The surface structure of such a drag sailis of subordinate interest, leading to low cost and deployment mechanics, which areeasy to build. The idea described in this paper is to use the drag sail deployment tech-nique and use the expanded membrane surface as a reflector antenna. The effectsof the surface errors, which are inevitable introduced by the mechanics, are studiedto help to determine a break-even point between antenna performance loss and costreduction compared to a conventional LDA. Possible applications are small satelliteslike CubeSats, which could enhance their communication link budget by deploying amedium performance but low cost LDA.

S13.4: Self-Calibration of Differential Cable-Adapters with Intra-Mode CrosstalkSebastian Wagner1, Stephan Kolb1, Reinhard Stolle1

1Hochschule Augsburg, GermanyTime: 09:30–09:50A new solution for the calibration of a multiport vector network analyzer (VNA) is pre-sented, in order to measure the mixed-mode scattering parameters (S-parameters)of a 4-port device under test (DUT). The calibration procedure accounts for couplingbetween identical modes (intra-mode) of modal ports, whereas different modes areassumed to be decoupled (inter-mode). The new method is an extension of known pro-cedures for leaky 4-port error-networks together with two extensions of the well-knownunknown-thru procedure. Among others, it requires application of a mode-conversionstandard, which can be a reciprocal yet otherwise unknown device.


S13.5: Measured Impact of Electromagnetic Scattering off Wind Turbines onBroadcast Signal PropagationChristian Bornkessel1, Sindy Schulze1, Matthias Hein2

1Technische Universität Ilmenau, Germany; 2Ilmenau University of Technology, Ger-manyTime: 09:50–10:10The electromagnetic scattering pattern of a wind turbine at DVB-T and DAB frequen-cies was studied by measurement on a scaled laboratory model, taking into accountdifferent yaw and pitch angles, and blade positions. The scattered energy peaks alongbackward directions, where it is stronger for vertical than for horizontal polarization, andis dominated by the mast. The variation of the yaw angle has greater effect comparedto blade and pitch variations. Illuminating the wind turbine from the back results instronger scattering compared to the front side due to the aerodynamic cross-sectionalshape of the blades. The scattering becomes stronger for increasing electrical sizeof the wind turbine. The experimental approach proves reliable and helpful for thedevelopment of propagation models.


Ses

sion

s:W

edne

sday

S14: Power Amplifier 2Room: HID, Chairs: Josef Hausner, Renato Negra, Michael Schlechtweg 10:30–12:10

S14.1: A 500W High Efficiency Class-E Power Amplifier for Heating a VariablePlasma Load at 10MHzGordon Notzon1, Thomas Busch1, Marcel van Delden1, Thomas Musch2

1Ruhr-University Bochum, Germany; 2Ruhr-Universität Bochum, GermanyTime: 10:30–10:50In this contribution, a high efficiency class-E power amplifier is presented, which isoptimized with respect to heat a variable plasma load at 10MHz. First of all, the de-sign of the class-E amplifier is demonstrated. Therefore, after the fundamental designequations, the dimensioning of amplifier’s lumped elements is presented. Furthermore,simulations and measurements are performed in order to verify the functionality andefficiency. During this, two high power MOSFETs from Microsemi and IXYS are com-pared. An efficiency of 90.7% at 507W output power and 50 load is achieved. Theresistance of the plasma load can change between 200 and 300. Therefore, an opti-mized matching network, which provides an almost constant output power of ±1% inthe desired load resistance range, is presented.

S14.2: A low power CMOS transmitter with Class-E power amplifiers for posi-tioning application in multi-bandChia-Yu Hsieh1, Juergen Roeber2, Andreas Baenisch1, Amelie Hagelauer1, ThomasUssmueller3, Robert Weigel41University of Erlangen-Nuremberg, Germany; 2Friedrich Alexander University, Ger-many; 3Universität Innsbruck, Austria; 4Institute for Electronics Engineering, Erlangen-Nuernberg Uni., GermanyTime: 10:50–11:10In this paper, a transmitter for outdoor positioning application such as animal trackingis introduced. Class-E power amplifiers are exploited in the transmitter system in orderto increase the energy efficiency for the demand of long operation duration of thesystem. Along with the need of power saving, a circuit topology is proposed to realizethe modulation based on Binary Offset Carrier (BOC) technique at two different bandsto achieve higher positioning accuracy and better utilization of the spectrum by trans-mitting data simultaneously. The operating frequencies of the system are 868 MHzand 2.4 GHz, and the circuit is designed in 150nm CMOS technology. The class-E


power amplifier shows the broadband characteristics on the power efficiency from 1to 3GHz while the measured output power is greater than 10 dBm from 1.3 to 2.8 GHz.

S14.3: Wideband 80 W Balanced Power Amplifier for ISM and LTE-BandsSophie Paul1, Sebastian Preis1, Wolfgang Heinrich1, Olof Bengtsson1

1Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, GermanyTime: 11:10–11:30An 80 W balanced GaN-HEMT power amplifier for 2.45-2.70 GHz using branch-linecouplers is presented in this paper. Its performance is compared to a single-transistorsolution. The analysis shows that a balanced amplifier is favorable because it simpli-fies measures to ensure electrical stability and allows better heat sinking.

S14.4: Reliable GaN HEMT Modeling Based on Chalmers Model and PulsedS-Parameter MeasurementsPeng Luo1, Olof Bengtsson1, Matthias Rudolph2

1Ferdinand-Braun-Institut Leibniz-Institut für Höchstfrequenztechnik, Germany;2Technical University Cottbus, GermanyTime: 11:30–11:50GaN HEMT performance is still compromised by trapping effects, but no commercialcircuit simulator already provides compact models that account for these effects. Thiswork explores the capability of a standard Chalmers (Angelov) model to accuratelypredict the power amplifier operation of GaN HEMTs. It is shown that relying on pulsedS-parameters and by restricting the model to be valid only for a fixed drain voltage,good simulation accuracy is achieved.

S14.5: VSWR Protection of Power Amplifiers Using BST ComponentsJérôme Ferretti1, Sebastian Preis2, Wolfgang Heinrich2, Olof Bengtsson2

1Ferdinand-Braun-Institut, Leibniz Institut fuer Hoechstfrequenztechnik, Germany;2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, GermanyTime: 11:50–12:10A VSWR-protected ISM-band PA was realized using a BST based varactor for detun-ing of the input matching. Output VSWR levels of 30:1 can be tolerated by applyinga varactor bias voltage of up to 20 V. The PA delivers 47.4 dBm output power at amaximum PAE of 49.5%. In case of high VSWR conditions the output power can belimited by detuning the varactor. It is shown that the concept protects the transistorefficiently with very low additional circuit complexity.


Ses

sion

s:W

edne

sday

S15: Material CharacterizationRoom: HIC, Chairs: Christian Damm, Joerg Schoebel 10:30–11:50

S15.1: Monostatic and Thickness-Independent Material Characterisation basedon Microwave EllipsometryJan Barowski1, Thorsten Schultze2, Ingolf Willms3, Ilona Rolfes1

1Ruhr-Universität Bochum, Germany; 2Universität Duisburg-Essen, Germany;3University Duisburg-Essen, GermanyTime: 10:30–10:50Material characterization utilizing microwave ellipsometry is based on the fact that thereflection coefficents of a wave impinging on a material depend on the incident fieldspolarization. Due to multiple reflections that occur in case of a material slab with finitedimensions these coefficients also strongly depend on the materials thickness. Thispaper describes an approach to determine the electromagnetic properties of a ma-terial under test by applying an ellipsometric measurement without knowledge of thematerials thickness. The paper shows that the additional measurement of the transmis-sion coefficents allows to perform an exact measurement of the complex permittivitysince the thickness dependencies in reflection and transmission coefficents canceleach other. The measurements are done in the frequency range from 22 GHz to 26GHz by using a vector network analyzer setup with a conical horn antenna.

S15.2: Dielectric Permittivity Determination in W-Band with Dielectric Ring Res-onatorsJanis Häseker1, Steffen Vogt1, Martin Schneider1

1University of Bremen, GermanyTime: 10:50–11:10In this work we are using a ring resonator made of dielectric waveguide (DWG) todetermine the complex permittivity of the waveguide’s material. The proposed methodoffers high precision and low complexity at millimetre wave frequencies compared toestablished methods like the Fabry-Perot Resonator. This set-up is especially usefulto find the tan of materials with low dielectric losses. Similar measurement techniquesare known at optical frequencies, but little work has been done using them in the mil-limetre wave bands. The theory of the ring resonator and the measurement set-up arepresented and the approach for the determination of _r and tan is explained. Differ-


ent materials are analysed and values of their complex permittivity are compared toliterature.

S15.3: A Grounded Coplanar Waveguide Resonator Based In-Line Material Char-acterization SensorArmin Talai1, Sebastian Mann2, Robert Weigel2, Alexander Koelpin3

1University of Erlangen-Nuremberg & Technical Faculty, Germany; 2University ofErlangen-Nuremberg, Germany; 3University of Erlangen-Nuremberg & Institute f. Elec-tronics Engineering, GermanyTime: 11:10–11:30Microwave Materials such as Rogers RO3003 are subject to process-related fluctua-tions in terms of the relative permittivity. The behavior of high frequency circuits likepatchantenna arrays and their distribution networks is dependent on the effective wave-length. Therefore, fluctuations of the relative permittivity will influence the resonancefrequency and antenna beam direction. This paper presents a grounded coplanarwaveguide based sensor, which can measure the relative permittivity at 77GHz, aswell as at other resonance frequencies, by applying it on top of the manufactured de-paneling. In addition, the sensor is robust against floating ground metallizations oninner printed circuit board layers, which are typically distributed over the entire surfacebelow antennas.

S15.4: Measurement of Complex Permittivity of Anisotropic Dielectric SpheresDaniel López Cuenca1, Rajpal Dudi1, Jan Hesselbarth2

1University of Stuttgart, Germany; 2University of Stuttgart & IHF – Institute of RadioFrequency Technology, GermanyTime: 11:30–11:50A new concept to measure the dielectric properties of anisotropic spheres at mi-crowave frequency is presented. First, the sphere is placed in a parallel-plate microstripstructure. The anisotropic axis of the sphere is determined in a three-step process.Then, sphere is placed in a rectangular waveguide cavity resonator, where resonancemodes of the sphere are excited and subsequently modeled in a field simulation tool.Simulations are matched with measurements by fitting the anisotropic complex per-mittivity parameters. The procedure is illustrated by determining the anisotropic axisand measuring the anisotropic complex permittivity of a sapphire sphere of 10 mmdiameter.


Aut

horI

ndex

Author Index

Abuelhaija, Ashraf, 56

Abufanas, Hasan, 57

AL-Mozani, Dhamia, 27

Albers, Tobias, 46, 95

Ali, Umair, 74, 80, 101

Antes, Jochen, 79

Arnous, MHD Tareq, 26

Ascher, Alois, 44, 94

Ashok, Arun, 87

Askar, Abdelrahman, 88

Avramidis, Konstantinos, 82, 83

Awny, Ahmed, 80

Ayhan, Serdal, 65

Bader, Bernhard, 89

Baenisch, Andreas, 73, 100

Bangert, Axel, 57

Barmuta, Pawel, 71

Barowski, Jan, 31

Baumgartner, Stefan, 31

Bengtsson, Olof, 27, 45, 95

Bento, Pedro, 86

Berroth, Manfred, 80

Bezvesilniy, Oleksandr, 66

Bhutani, Akanksha, 36

Biber, Stephan, 56

Biebl, Erwin, 44, 94

Bieda, Bartosz, 71

Binder, Joachim, 60, 61

Blau, Kurt, 33, 52

Bloessl, Bastian, 42

Bober, Martin, 80

Boeck, Georg, 28

Boehm, Christian, 48, 97Boglione, Luciano, 87Bousseaud, Pierre, 32Brückner, Klemens, 90Bredendiek, Christian, 86Brueckner, Sebastian, 28, 74, 101Buck, Adam, 56Burgos, Diego, 75, 103Byndas, Arkadiusz, 55

Carta, Corrado, 59Cassens, Björn, 42Chaloun, Tobias, 68Chatterjee, Debalina, 33Chen, Zhichao, 55Cleriti, Riccardo, 53Colangeli, Sergio, 53Conway, Garrard, 68

Döring, Björn, 47, 96Dahl, Christoph, 77Deckelmann, Maximilian, 63Dey, Utpal, 57Diebold, Sebastian, 68Diewald, Andreas, 54Dill, Stephan, 46, 95Dinis, Rui, 86Dortmund, Sven, 31Dressler, Falko, 42Dushchuluun, Khishigbayar, 43

Ebelt, Randolf, 70Eberhardt, Michael, 44, 94Eibel, Christopher, 42


Eibert, Thomas F., 30, 35, 68El-Shennawy, Mohammed, 81Ellinger, Frank, 59, 60, 64, 81Elsayed, Mohamed, 88Enokihara, Akira, 47, 97Erhart, Christian, 81Erni, Daniel, 55Ersoy, Erhan, 45, 95

Föhn, Thomas, 80Faz, Usman, 30Ferranti, Francesco, 71Ferreira, Yroá, 75, 103Fickenscher, Thomas, 78Fischer, Georg, 44, 73, 79, 90, 92, 100Fischer, Gunter, 74, 80, 101Fischer, Michael, 89, 90, 91Flammia, Ivan, 85Fortoul, Vincent, 65Franck, Joachim, 82, 83Frank, Astrid, 91Friederich, Andreas, 61Fuhrmann, Jörg, 58Fumeaux, Christophe, 30, 34

Galwas, Bogdan, 73, 100Gantenbein, Gerd, 82, 83Gardill, Markus, 79Geck, Bernd, 48, 97Gensch, Michael, 84Gerding, Michael, 65Giese, Malte, 64Goettel, Benjamin, 36Gold, Gerald, 62Gomes, Marco, 86

Goodman, Joel, 87Gorovyi, Ievgen, 66Groezing, Markus, 80Gropp, Sebastian, 89, 90, 91Gruszczynski, Slawomir, 70Guarin, Gustavo, 79Guha, Subhajit, 45, 95Gutzeit, Nam, 75, 102

Hadi, Raid, 57Hafenecker, Sven, 43Hagelauer, Amelie, 89, 90Hamed, Ahmed, 88Hardock, Andreas, 52Hartmann, Markus, 42Hein, Matthias, 33, 52, 75, 90, 102Heinen, Stefan, 87Heinrich, Wolfgang, 26, 27, 45, 95Heising, Carl, 87Helmreich, Klaus, 62Herbst, Sebastian, 40Hertlein, Markus, 44Hesselbarth, Jan, 63Heyn, Thomas, 44Hierold, Martin, 41Hillebrand, Christoph, 68Hoffmann, Martin, 89, 90, 91Hofman, Mariusz, 55Hofmann, Jonas, 65Hsieh, Chia-Yu, 41

Illy, Stefan, 82, 83

Jörges, Udo, 60Jacob, Arne, 51, 64, 67


Aut

horI

ndex

Jain, P, 83

Jakoby, Rolf, 34, 60, 61

Jamal, Farabi, 45, 95

Jelonnek, John, 29, 82, 83

Jin, Jianbo, 82

Jirousek, Matthias, 47, 96

Joram, Niko, 81

Jouanneaux, Alain, 76, 103

K. Horestani, Ali, 30, 34

Kühn, Stefanie, 52

Kabacik, Pawel, 55

Kalaria, Parth, 83

Kallfass, Ingmar, 68, 79

Kapitza, Rüdiger, 42

Karolewski, Dominik, 90

Kasper, Erich, 59

Kastenhuber, Tina, 73, 100

Kaufmann, Thomas, 34

Kawai, Tadashi, 47, 97

Kayser, Thorsten, 29

Kemeth, Ferdinand, 39

Khani, Besher, 85

Kholodnyak, Dmitry, 34

Kienemund, Daniel, 60, 61

Kishihara, Mitsuyoshi, 47, 97

Kissinger, Dietmar, 45, 79, 95

Klemp, Oliver, 48, 97

Knott, Peter, 29

Koelpin, Alexander, 41

Koenen, Christian, 68

Kohler, Christian, 60, 61

Kostecki, Konrad, 59

Kowalewski, Jerzy, 57

Krauße, Dominik, 90Krozer, Viktor, 78Kuhnt, Markus, 78Kunzler, Jonas, 75, 103

Laabs, Martin, 84Landeau, Thomas, 76, 103Lehner, Markus, 44, 94Lemos, Rodrigo, 75, 103Leszczynska, Natalia, 72Leufker, Jan Dirk, 59Leuther, Arnulf, 68Lewandowski, Arkadiusz, 71Limiti, Ernesto, 53Link, Guido, 29Losert, Markus, 82Losito, Onofrio, 76, 103Lutz, Steffen, 81

M, Thottappan, 83Müller, Daniel, 36, 68, 79Müller, Jens, 75, 89, 90, 91, 102Maassen, Daniel, 28Madziar, Krzysztof, 73, 100Mahler, Tobias, 57Mandel, Christian, 34Mantz, Hubert, 81Massler, Hermann, 68Mathew, Sumy, 75, 102Matthies, Klaus, 59Maune, Holger, 61Mayer, Frieder, 39, 41Meiners, Bastian, 31Meliani, Chafik, 45, 95Menzel, Wolfgang, 68


Messinger, Tobias, 79Meyer-Wegener, Klaus, 40Miech, Markus, 85Mikolajek, Morten, 61Mimis, Konstantinos, 26Miralles Navarro, Enric, 64Moll, Jochen, 78Monka, Carsten, 28Montezuma, Paulo, 86Moreira, José, 58Mrozowski, Michal, 72Mueller, Felix, 77Muneer, Badar, 62

Nüßler, Dirk, 85Nabeel, Muhammad, 42Nalobin, Artur, 31Negra, Renato, 32, 46, 48, 51, 88, 96,

98Neumaier, Daniel, 88Neumann, Niels, 84Nghe, Chi Thanh, 28Nickel, Matthias, 34Nikfalazar, Mohammad, 60, 61Nottensteiner, Anton, 31Nowak, Jacek, 89, 90, 92Nowak, Thorsten, 42

Oborovski, Andreas, 63Oehme, Michael, 59Ohta, Isao, 47, 97Ossmann, Patrick, 58Osuch, Tomasz, 73, 100

Pagonakis, Ioannis, 82, 83

Palma, Giuseppe, 76, 103Palomba, Mirko, 53Palombini, Diego, 53Pauli, Mario, 65Pavlenko, Tatiana, 70Pawlan, Jeffrey, 74, 101Peichl, Markus, 46, 95Perkuhn, Robert, 29Perov, Dmitry, 54Petersen, Swen, 43Pham, Nhat, 67Pitschi, Maximilian, 89Plettemeier, Dirk, 84Podoskin, Dmitry, 90Pohl, Nils, 86Portosi, Vincenza, 76, 103Posselt, Adrian, 48, 97Preis, Sebastian, 26Preisner, Michal, 55Pretl, Harald, 58Prudenzano, Francesco, 76, 103

Qayyum, Saad, 51

Rügamer, Alexander, 36Raab, Sebastian, 47, 96Ramopoulos, Vasileios, 29Rave, Christian, 51Raza, Muhammad Bilal, 78Reckmann, Marc, 48, 98Reimann, Jens, 47, 96Reiss, Simon, 68Renner, Olaf, 44Rennings, Andre, 55Reustle, Christoph, 67, 70


Aut

horI

ndex

Richter, Alexander, 60

Rinkevich, Anatoly, 54

Ripperger, Simon, 39, 41

Roeber, Juergen, 73, 100

Roehr, Sven, 67

Rolfes, Ilona, 31, 77

Rosigkeit, Daniel, 31

Rudolf, Daniel, 47, 96

Rymanov, Vitaly, 85

Słobodzian, Piotr, 71

Sagade, Abhay, 88

Samartsev, Andrey, 82

Sandhagen, Carl, 57

Schäffel, Christoph, 90, 91

Schöpfer, Johanna, 56

Schüßler, Martin, 34

Scherr, Steffen, 65

Schiselski, Mario, 84

Schmidt, Martin, 80

Schoebel, Joerg, 28, 74, 101

Schröder-Preikschat, Wolfgang, 42

Schreurs, Dominique, 71

Schrey, Moritz, 87

Schulze, Joerg, 59

Schuster, Christian, 52

Schwerdt, Marco, 47, 96

Sczyslo, Sebastian, 31

Seitz, Jochen, 38

Seyfried, Daniel, 74, 101

Shaterian, Zahra, 30, 34

Shishegar, Amir Ahmad, 54

Shmakov, Denys, 67, 70

Siart, Uwe, 30, 68

Silva Cortes, Victor, 90, 92

Silva, Hugo, 75, 103

Silva, Vitor, 86

Sohrabi, Mojtaba, 60

Solbach, Klaus, 55, 56

Soldatov, Sergey, 29

Sommer, Christoph, 42

Sommer, Ralf, 89, 90, 92

Spira, Steffen, 75, 102

Springer, Andreas, 58

Stöhr, Andreas, 85

Staszek, Kamil, 70

Stefani, Viktor, 59

Stein, Wadim, 63

Steinbuch, Dirk, 77

Stelzer, Andreas, 69

Stephan, Ralf, 52, 75, 102

Stroth, Ulrich, 68

Subbiah, Iyappan, 87

Szydłowski, Łukasz, 72

Tag, Andreas, 89, 90

Takahashi, Koji, 47, 97

Tarar, Mohsin, 48, 98

Tenschert, Johannes, 40

Tessmann, Axel, 68, 79

Thiede, Andreas, 74, 80, 101

Thomas, Sven, 86

Thumm, Manfred, 82, 83

Thurn, Karsten, 70

Tooni, Sakineh, 35

Torabi, Abdorreza, 54

Turgaliev, Viacheslav, 34

Tzschoppe, Christoph, 60


Ulbricht, Gerald, 32

Varga, Gabor, 87

Vavriv, Dmytro, 66

Vehring, Soenke, 45, 95

Vietzorreck, Larissa, 35

Vogt, Michael, 65, 77

Vossiek, Martin, 56, 63, 67, 70

Wagner, Jens, 60

Wagner, Karl, 89

Wagner, Sandrine, 79

Waldhelm, Jan, 64

Waldschmidt, Christian, 68

Walter, Thomas, 77, 81

Wang, Xin, 69

Watkins, Gavin, 26

Wei, Muh-Dey, 46, 48, 51, 96, 98

Weigel, Robert, 41, 73, 77, 79, 81, 89,100

Welker, Tilo, 75, 102Welpot, Marcel, 48, 97Wiens, Alex, 60, 61Wincza, Krzysztof, 70Wolff, Nikolai, 27

Yousaf, Jawad, 72, 99

Zameshaeva, Evgenia, 34Zhang, Jianxiong, 80Zhang, Wogong, 59Zhang, Zihui, 26Zheng, Yuliang, 60Zhu, Qi, 62Ziegler, Volker, 64Zimmer, Gernot, 28Zwick, Thomas, 36, 57, 65, 68


Documents

Conference Programme GeMiC 2016 - menschlich - weltoffen€¦ · PO1.4: Miniaturized Broadband Three-Way Power Divider with 120° Phase Dif-ferences between Output Ports Hitoshi Hayashi1