introduction to high frequency structure simulator
DESCRIPTION
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 PresentationTRANSCRIPT
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Introduction to High Frequency Structure
Simulator
Pengcheng Jia
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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
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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
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Agilent HFSS
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Ansoft HFSS
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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
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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
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Applications Antennas Microwave transitions Waveguide components RF filters Three-dimensional discontinuities Passive circuit elements
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Procedure to simulate
1. Open or Make new project2. Draw objects3. Assign material property4. Define boundary conditions5. Solve6. Display result
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New project
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Project Preferences
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Drawing basics
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Drawing Lines & 2 D objects
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Drawing 3 D objects
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Object Library
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Editing Objects
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Materials
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Metal & Resistor
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Boundaries
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Boundary Conditions
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Add A Boundary
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Display Boundary
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Calibrating Ports
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Solve
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Frequency & Meshing
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Displaying Results
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S Matrix
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Plot Field
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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
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Finite Element Method
Tetrahedron
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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
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Projects with HFSS Microstrip Line to Waveguide Transition
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EM Field of the transition
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Waveguide Combiner System
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Slotline Antenna
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Bonding Wire Discontinuity
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Packaging for CPW Lines
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Field Plot
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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
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References HP High-Frequency Structure
Simulator User’s Reference HP High-Frequency Structure
Simulator Tutorial