Introduction to High Frequency Structure Simulator Pengcheng Jia
- Slides: 40
Introduction to High Frequency Structure Simulator Pengcheng Jia
Background n n n n Introduced from 90 s 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 n n HFSS consume tremendous memory if fine result is needed 300 M+ Memory and 400 M+ processor is recommended Floating License Key within ECEWIN 2 K subnet Remote access to new Scully which has 1 G RAMBUS 400 Memory and 1. 7 G P 4 processor
Agilent HFSS
Ansoft HFSS
Features(1) n n Computes s-parameters and full-wave fields for arbitrarily-shaped 3 D passive structures Powerful drawing capabilities to simplify design entry Field solving engine with accuracy-driven adaptive solutions Powerful post-processor for unprecedented insight into electrical performance
Features(2) n n n Advanced materials Model Library-including spiral inductors Model half, quarter, or octet symmetry Calculate far-field patterns Wideband fast frequency sweep Create parameterized cross section models 2 D models
Applications n n n Antennas Microwave transitions Waveguide components RF filters Three-dimensional discontinuities Passive circuit elements
Procedure to simulate 1. 2. 3. 4. 5. 6. Open or Make new project Draw objects Assign material property Define boundary conditions Solve 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 n r=8. 5; Hsub=625 um; W=150 um; G=75 um ---Theoretical Equation @10 G Theoretical HFSS L=100 um 0. 04 n. H 0. 05 n. H L=300 um 0. 12 n. H 0. 13 n. H L=600 um 0. 24 n. H L=800 um 0. 33 n. H 0. 31 n. H
Finite Element Method Tetrahedron
Impedance Concept n Zpi, Zpv & Zvi Microstrips use Zpi impedance n Slot-type (CPW) use Zpv impedance n TEM waves use Zvi impedance n
Projects with HFSS n 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 n n http: //www. ansoft. com http: //dutettq. et. tudelft. nl/~hfss/welcome. html http: //wwwinfo. cern. ch/ce/ae/Maxwell/index. html Documents for HP HFSS is in “Scully” c: /Otherprg/hfss/doc
References n n HP High-Frequency Structure Simulator User’s Reference HP High-Frequency Structure Simulator Tutorial
- High frequency structure simulator
- What is joint relative frequency
- Frequency vs relative frequency
- Angular frequency to frequency
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- Relative frequency bar chart
- Marginal frequency table
- Conditional relative frequency table
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