Pavel MiskovskyPh.D. candidate

Sept. - 2005

Telecommunications Technological Center of Catalonia

(CTTC)

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UWB AntennasUWB AntennasNew facilities

“Parc Mediterrani de la Tecnologia”

3.500 m2 building 3 floors (970 m2 each for utilization) Offices, meeting rooms, training room, labs and workshops, terrace for antenna use

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UWB AntennasUWB Antennas

Antenna Requirements:

Low cost Easy to integrate Small size Wide-band Omnidirectional

CTTC Approach:

Planar technology

Self-Complementary Bow-tie based topology

Double-sided Technology

FCC definition Fractional bandwidth≥20% or

>500MHz absolute bandwidth 3.1GHz – 10.6 GHz

Short pulses [ns]No carrierGaussian shape and derivatesWithout DC component

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UWB AntennasUWB Antennas

Antenna Subsystem

Radiating UnitMatching/Filtering Network

Matching Technologies

Double-SidedBow-tie Shaped

Double-SidedMatching impedanceFiltering

MicrostripTo

Double-Sided

Exploring the potential of double-sides technology in terms of impedance matching, gain and polarization

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UWB AntennasUWB AntennasAntenna, matching network and technology transformer

-Bow-tie shaped antenna with a circle tangent to a 90 deg triangle

- feedline width optimized

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UWB AntennasUWB AntennasMeasurements

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UWB AntennasUWB Antennas

copolar

crosspolar

Measured radiations patterns, E-plane (xy)

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UWB AntennasUWB AntennasTransfer function dependence on frequency and relative orientation (E-plane) between two identical antennas

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2 4 6 8 10 12-30

-25

-20

-15

-10

-5

0

GHz

Ret

urn

Lo

sses

(d

B)

50 cent antenna

Measure

HFSS simulation

UWB (3.1 -10.6 GHz)

UWB 50 cent antennaUWB 50 cent antenna