HFSS Antenna Design Kit

Ansoft HFSS Antenna Design Kit Arien Sligar 2007 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

Overview of HFSS Antenna Design Kit GUI-based wizard tool Automates geometry creation, solution setup, and post-processing reports for 50 common antenna elements Assists in learning to use HFSS for antenna design Parametric antenna geometry Easily modify parameters in HFSS after generating initial model Facilitates parametric sweeps and optimizations Synthesis feature for each antenna Automatically generates physical dimensions for desired frequency Provides starting point for new designs 2007 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

Available Antenna Types Planar Dipole Wire Dipole Rectangular Patch Elliptical Patch Pyramidal Horn E-plane Sectoral Horn H-plane Sectoral Horn Conical Horn Circular Waveguide Rectangular Waveguide Elliptical Horn Wire Monopole Archimedean Spiral Log-Spiral Sinuous Spiral 2007 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary

Available Antenna Types (cont) Conical Archimedean Spiral Conical Log- Spiral Conical Sinuous Spiral Vivaldi (Tapered Slot) Stepped Vivaldi Log-Periodic Toothed Log-Periodic Toothed Trapezoidal PIFA with Shorting Strip PIFA with Shorting Pin PIFA Linear Taper Slot Rounded Bowtie Bowtie Bicone Discone 2007 ANSYS, Inc. All rights reserved. 4 ANSYS, Inc. Proprietary

Available Antenna Types (cont) Inset Fed Microstrip Patch Edge Fed Microstrip Patch Inset Fed Elliptical Microstrip Patch Edge Fed Elliptical Microstrip Patch Bowtie-Slot Helix Normal and Axial Mode Helix -Continuous Taper Axial Mode QFHA-SC QFHA-OC Slot Gap Fed Slot Microstrip Fed Dual Slot Dipole Array 2007 ANSYS, Inc. All rights reserved. 5 ANSYS, Inc. Proprietary

Available Antenna Types (cont) WLAN Ceramic Chip Antenna WLAN Dual Band Slot Antenna Quasi Yagi Element Quasi Yagi 2x1 Array UHF Probe Slot Feed Patch CPW Bowtie 2007 ANSYS, Inc. All rights reserved. 6 ANSYS, Inc. Proprietary

Common Applications for Each Antenna Type Antenna Type Dipole Patch Horn Waveguides Planar spirals Conical spirals Vivaldi Log-periodic PIFA Bowtie Bicone/discone Common Applications Communication systems, consumer electronics, WLAN, RFID, biomedical Consumer electronics, mobile handsets, phased arrays, GPS Reflector feeds, gain standards for antenna measurements, EMC/EMI tests, communication systems, radar, direction finding (DF), mm-wave systems Phased arrays, radar, high power systems, reflector feeds, circularly polarized systems Wideband systems, multi-function apertures, electronic warfare, UWB, reflector feeds, telemetry, direction finding, missile guidance Wideband systems, circularly polarized systems, aerospace systems, EMI/EMC testing, DF systems Phased arrays, radar, wideband systems, multi-function apertures, electronic warfare, UWB Wideband systems, reflector feeds, UWB Consumer electronics, mobile handsets, medical devices, WLAN, Bluetooth Phased arrays, radar, wideband systems, RFID, UWB, GPR Wideband systems, electronic warfare, EMC tests, beacons, UWB 2007 ANSYS, Inc. All rights reserved. 7 ANSYS, Inc. Proprietary

Using HFSS Antenna Design Kit Select desired antenna type from tree structure Enter necessary antenna parameters Units and solution frequency Physical dimensions for element and feed Choice of absorbing boundary condition (ABC) or perfectly matched layer (PML) for outer boundary of HFSS model Alternatively, synthesize parameters from desired operating frequency Select Create Model to invoke HFSS Antenna Types Antenna Parameters Synthesis Feature 2007 ANSYS, Inc. All rights reserved. 8 ANSYS, Inc. Proprietary

Antenna Synthesis Option Creates physical characteristics from desired operating frequency or operating band Based on general design guidelines found in common textbooks It is not possible to synthesize the best design based on frequency alone Depends upon additional parameters such as size, gain, beamwidth, bandwidth, materials, etc. Synthesized antenna should be viewed as one possible starting point for actual design process Parameterized models allow for automated optimizations Synthesis based on resonant frequency for narrowband antennas Synthesis based on frequency band for wideband antennas 2007 ANSYS, Inc. All rights reserved. 9 ANSYS, Inc. Proprietary

Example HFSS Model Created by Antenna Design Kit Model ready to solve Ports and Boundary Conditions Solution Setup and Frequency Sweep Reports for Input Impedance and Radiation Patterns Parameters for Antenna Geometry 2007 ANSYS, Inc. All rights reserved. 10 ANSYS, Inc. Proprietary

Import Custom Antennas Custom Antenna can be added to ADK user interface Custom library files created in directory <ADK_InstalationDirectory>\Custo m_library *.adk - Project File *.ant Parameter File, this file contains a list of all parameters that will be shown in ADK User Interface. Lines can be removed to keep them from displaying in ADK. *.jpg Design Image, image can be replace with any custom image. Maximum resolution is 250x475 pixels If multiple designs exists in project you will be prompted to choose which design you wish to include Custom library can be exported to other users by copying all files located in Custom_Library directory and pasting them into Custom_Library directory on any other machine. Select File Import Custom Antenna Browse to location of HFSS project to be included in ADK Added antenna will now be available under Custom Antenna in ADK Tree view Parameters can be entered and model created 2007 ANSYS, Inc. All rights reserved. 11 ANSYS, Inc. Proprietary

Results of Example HFSS Model Reports automatically generated by ADK Antenna performance generally evaluated using input impedance and far-field radiation patterns Antenna must be well-matched to impedance of feed circuit Antenna must spatially distribute input power in desired direction(s) Input Impedance Return Loss 3D Radiation Pattern 2D Pattern Cuts 2007 ANSYS, Inc. All rights reserved. 12 ANSYS, Inc. Proprietary

Design Ready for Automated Optimization All antenna parameters available for Optimetrics analysis Parametric sweeps Optimizations 2007 ANSYS, Inc. All rights reserved. 13 ANSYS, Inc. Proprietary

Integrate Antenna Design Kit with HFSS Antenna Design Kit can be added as an external tool to be launched from within HFSS To add as External Tool Choose the menu Tools External Tools Select Add to create a new External Tool Specify Menu Text, Command and Initial Directory (replace InstallationDirectory with actual installation directory) Antenna Design Kit can now be run from the menu Tools Antenna Design Kit 2007 ANSYS, Inc. All rights reserved. 14 ANSYS, Inc. Proprietary

Antenna Design Kit Documentation Complete description of parameters necessary for each antenna Design references for each antenna HFSS results for nominal antenna parameters Input impedance and far-field patterns Best practices for antenna design using HFSS 2007 ANSYS, Inc. All rights reserved. 15 ANSYS, Inc. Proprietary

HFSS Antenna Design Kit Summary Automates model creation for variety of common antennas Resonant and wideband antennas 3D and planar antennas Creates ready-to-solve designs! Synthesis feature provides example design for desired operating frequency or bandwidth Help documentation describes all parameters for each antenna Possible to include additional antennas in future versions 2007 ANSYS, Inc. All rights reserved. 16 ANSYS, Inc. Proprietary

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