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Introduction to High Frequency Structure Simulator. Pengcheng Jia. Background. Introduced from 90s Simulation tool for complex 3 D geometries Using Finite Element Method Adaptive Mesh generation & refinement 2 Main Vendors—Agilent & Ansoft Merger from May 1 - PowerPoint PPT Presentation
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Introduction to High Frequency Structure
Simulator
Pengcheng Jia
Background Introduced from 90s Simulation tool for complex 3 D
geometries Using Finite Element Method Adaptive Mesh generation & refinement 2 Main Vendors—Agilent & Ansoft Merger from May 1 Transfer to Ansoft HFSS after Nov. 1,
2001
Requirement & Resources HFSS consume tremendous memory if
fine result is needed 300M+ Memory and 400M+ processor
is recommended Floating License Key within ECEWIN2K
subnet Remote access to new Scully which
has 1 G RAMBUS400 Memory and 1.7G P4 processor
Agilent HFSS
Ansoft HFSS
Features(1) Computes s-parameters and full-wave Computes s-parameters and full-wave
fields for arbitrarily-shaped 3D passive fields for arbitrarily-shaped 3D passive structuresstructures
Powerful drawing capabilities to simplify Powerful drawing capabilities to simplify design entrydesign entry
Field solving engine with accuracy-driven Field solving engine with accuracy-driven adaptive solutionsadaptive solutions
Powerful post-processor for unprecedented Powerful post-processor for unprecedented insight into electrical performanceinsight into electrical performance
Features(2) Advanced materialsAdvanced materials Model Library-including spiral Model Library-including spiral
inductorsinductors Model half, quarter, or octet symmetry Model half, quarter, or octet symmetry Calculate far-field patternsCalculate far-field patterns Wideband fast frequency sweepWideband fast frequency sweep Create parameterized cross section Create parameterized cross section
models- 2D modelsmodels- 2D models
Applications Antennas Microwave transitions Waveguide components RF filters Three-dimensional discontinuities Passive circuit elements
Procedure to simulate
1. Open or Make new project2. Draw objects3. Assign material property4. Define boundary conditions5. Solve6. Display result
New project
Project Preferences
Drawing basics
Drawing Lines & 2 D objects
Drawing 3 D objects
Object Library
Editing Objects
Materials
Metal & Resistor
Boundaries
Boundary Conditions
Add A Boundary
Display Boundary
Calibrating Ports
Solve
Frequency & Meshing
Displaying Results
S Matrix
Plot Field
Result Comparison r=8.5; Hsub=625 um; W=150um; G=75 um
@10G Theoretical
HFSS
L=100 um
0.04 nH 0.05 nH
L=300 um
0.12 nH 0.13 nH
L=600 um
0.24 nH 0.24 nH
L=800 um
0.33 nH 0.31 nH
00
0
L
L
Z jZ Tan LZ Z
Z jZ Tan L
---Theoretical Equation
Finite Element Method
Tetrahedron
Impedance Concept Zpi, Zpv & Zvi Microstrips use Zpi impedance
Slot-type (CPW) use Zpv impedance
TEM waves use Zvi impedance
*
2 1; ;
2
PZpi P ExHds I Hdl
I I
*
2
V VZpv
P
Zvi Zpi Zpv
Projects with HFSS Microstrip Line to Waveguide Transition
EM Field of the transition
Waveguide Combiner System
Slotline Antenna
Bonding Wire Discontinuity
Packaging for CPW Lines
Field Plot
Useful links http://www.ansoft.com http://dutettq.et.tudelft.nl/~hfss/welcome.ht
ml http://wwwinfo.cern.ch/ce/ae/Maxwell/index.
html
Documents for HP HFSS is in “Scully” c:/Otherprg/hfss/doc
References HP High-Frequency Structure
Simulator User’s Reference HP High-Frequency Structure
Simulator Tutorial