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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

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Introduction to High Frequency Structure Simulator

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  1. Introduction to High Frequency Structure Simulator Pengcheng Jia

  2. 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

  3. 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

  4. Agilent HFSS

  5. Ansoft HFSS

  6. 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

  7. 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

  8. Applications • Antennas • Microwave transitions • Waveguide components • RF filters • Three-dimensional discontinuities • Passive circuit elements

  9. Procedure to simulate • Open or Make new project • Draw objects • Assign material property • Define boundary conditions • Solve • Display result

  10. New project

  11. Project Preferences

  12. Drawing basics

  13. Drawing Lines & 2 D objects

  14. Drawing 3 D objects

  15. Object Library

  16. Editing Objects

  17. Materials

  18. Metal & Resistor

  19. Boundaries

  20. Boundary Conditions

  21. Add A Boundary

  22. Display Boundary

  23. Calibrating Ports

  24. Solve

  25. Frequency & Meshing

  26. Displaying Results

  27. S Matrix

  28. Plot Field

  29. Result Comparison • r=8.5; Hsub=625 um; W=150um; G=75 um ---Theoretical Equation

  30. Finite Element Method Tetrahedron

  31. Impedance Concept • Zpi, Zpv & Zvi • Microstrips use Zpi impedance • Slot-type (CPW) use Zpv impedance • TEM waves use Zvi impedance

  32. Projects with HFSS • Microstrip Line to Waveguide Transition

  33. EM Field of the transition

  34. Waveguide Combiner System

  35. Slotline Antenna

  36. Bonding Wire Discontinuity

  37. Packaging for CPW Lines

  38. Field Plot

  39. 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

  40. References • HP High-Frequency Structure Simulator User’s Reference • HP High-Frequency Structure Simulator Tutorial

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