Transcript Introduction to High Frequency Structure Simulator
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 fields for arbitrarily-shaped 3D 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) 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 2D models
Applications 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 r=8.5; Hsub=625 um; W=150um; G=75 um
Z
Z
0
Z L Z
0 0
L
---Theoretical Equation @10G Theoretical HFSS L=100 um 0.04 nH L=300 um 0.12 nH 0.05 nH 0.13 nH L=600 um 0.24 nH L=800 um 0.33 nH 0.24 nH 0.31 nH
Finite Element Method Tetrahedron
Impedance Concept Zpi, Zpv & Zvi Microstrips use Zpi impedance
Zpi
2
P
* ;
P
1 2
Hdl
Slot-type (CPW) use Zpv impedance *
Zpv
2
P
TEM waves use Zvi impedance
Zvi
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.html
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