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High Frequency Structural Simulator
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user’s guide – High Frequency Structure Simulator
10101010
High Frequency Structure Simulator
ANSOFT CORPORATION • ••• 225 West Station Square Dr. Suite 200 • ••• Pittsburgh, PA 15219-
The information contained in this document is subject to change without notice.
Ansoft makes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. Ansoft shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing, performance,
or use of this material.
© 2005 Ansoft Corporation. All rights reserved.
Ansoft Corporation
225 West Station Square Drive
Suite 200
Pittsburgh, PA 15219
USA
Phone:Phone:Phone:Phone: 412-261- Fax:Fax:Fax:Fax: 412-471-
HFSS and Optimetrics are registered trademarks or trademarks of Ansoft Corporation.
All other trademarks are the property of their respective owners.
New editions of this manual will incorporate all material updated since the previous
edition. The manual printing date, which indicates the manual’s current edition, changes when a new edition is printed. Minor corrections and updates
which are incorporated at reprint do not cause the date to change.
Update packages may be issued between editions and contain additional and/or
replacement pages to be merged into the manual by the user. Note that pages
which are rearranged due to changes on a previous page are not considered to
be revised.
Edition:Edition:Edition:Edition: REV1. Date:Date:Date:Date: 21 June 2005
Software Version:Software Version:Software Version:Software Version: 10.
Ansoft HFSS Fundamentals
HFSS is a high-performance full-wave electromagnetic(EM) field simulator for arbitrary 3D volumetric passive device modeling that takes advantage of the familiar Microsoft Windows graphical user interface. It integrates simulation, visualization, solid modeling, and automation in an easy-to-learn environment where solutions to your 3D EM problems are quickly and accurately obtained. Ansoft HFSS employs the Finite Element Method(FEM), adaptive meshing, and brilliant graphics to give you unparalleled performance and insight to all of your 3D EM problems. Ansoft HFSS can be used to calculate parameters such as S- Parameters, Resonant Frequency, and Fields. Typical uses include: Package Modeling – BGA, QFP, Flip-Chip PCB Board Modeling – Power/Ground planes, Mesh Grid Grounds, Backplanes Silicon/GaAs - Spiral Inductors, Transformers EMC/EMI – Shield Enclosures, Coupling, Near- or Far-Field Radiation Antennas/Mobile Communications – Patches, Dipoles, Horns, Conformal Cell Phone Antennas, Quadrafilar Helix, Specific Absorption Rate(SAR), Infinite Arrays, Radar Cross Section(RCS), Frequency Selective Surfaces(FSS) Connectors – Coax, SFP/XFP, Backplane, Transitions Waveguide – Filters, Resonators, Transitions, Couplers Filters – Cavity Filters, Microstrip, Dielectric HFSS is an interactive simulation system whose basic mesh element is a tetrahedron. This allows you to solve any arbitrary 3D geometry, especially those with complex curves and shapes, in a fraction of the time it would take using other techniques. The name HFSS stands for High Frequency Structure Simulator. Ansoft pioneered the use of the Finite Element Method(FEM) for EM simulation by developing/implementing technologies such as tangential vector finite elements, adaptive meshing, and Adaptive Lanczos-Pade Sweep(ALPS). Today, HFSS continues to lead the industry with innovations such as Modes-to-Nodes and Full- Wave Spice™. Ansoft HFSS has evolved over a period of years with input from many users and industries. In industry, Ansoft HFSS is the tool of choice for high-productivity research, development, and virtual prototyping.
Installing the Ansoft HFSS Software
Microsoft Windows XP(32/64), Windows 2000, or Windows 2003 Server. For up- to-date information, refer to the HFSS Release Notes. Pentium –based computer 128MB RAM minimum 8MB Video Card minimum Mouse or other pointing device CD-ROM drive
For up-to-date information, refer to the HFSS Installation Guide
NOTENOTENOTENOTE: You should make backup copies of all HFSS projects created with a previous version of the software before opening them in HFSS v
Getting Help
If you have any questions while you are using Ansoft HFSS you can find answers in several ways: Ansoft HFSS Online HelpAnsoft HFSS Online HelpAnsoft HFSS Online HelpAnsoft HFSS Online Help provides assistance while you are working. To get help about a specific, active dialog box, click the HelpHelpHelp buttonHelp in the dialog box or press the F1F1F1F1 key. Select the menu item Help > ContentsHelp > ContentsHelp > ContentsHelp > Contents to access the online help system. TooltipTooltipTooltipTooltips are available to provide information about tools on the toolbars or dialog boxes. When you hold the pointer over a tool for a brief time, a tooltip appears to display the name of the tool. As you move the pointer over a tool or click a menu item, the StatusStatusStatusStatus BarBarBarBar at the bottom of the Ansoft HFSS window provides a brief description of the function of the tool or menu item. The Ansoft HFSS Getting Started guide provides detailed information about using HFSS to create and solve 3D EM projects. Ansoft Technical SupportAnsoft Technical SupportAnsoft Technical SupportAnsoft Technical Support To contact Ansoft technical support staff in your geographical area, please log on to the Ansoft corporate website, www.ansoft.com and select ContactContactContactContact. Your Ansoft sales engineer may also be contacted in order to obtain this information.
If your computer is connected to the Internet, you can visit the Ansoft Web site to learn more about the Ansoft company and products. From the Ansoft Desktop Select the menu item Help > Ansoft Corporate WebsiteHelp > Ansoft Corporate WebsiteHelp > Ansoft Corporate WebsiteHelp > Ansoft Corporate Website to access the Online Technical Support (OTS) system. From your Internet browser Visit www.ansoft.com
Getting Help
The following link will direct you to the Ansoft Support Page. The Ansoft Support Pages provide additional documentation, training, and application notes. Web Site: http://www.ansoft.com/support.cfm Technical Support: 9-4 EST: Pittsburgh, PAPittsburgh, PAPittsburgh, PAPittsburgh, PA (412) 261-3200 x0 – Ask for Technical Support
Burlington, MABurlington, MABurlington, MABurlington, MA (781) 229-8900 x0 – Ask for Technical Support
San Jose, CASan Jose, CASan Jose, CASan Jose, CA (408) 261-9095 x0 – Ask for Technical Support
Portland, ORPortland, ORPortland, ORPortland, OR (503) 906-7944 or (503) 906-
El Segundo, CAEl Segundo, CAEl Segundo, CAEl Segundo, CA (310) 426-2287 – Ask for Technical Support
Ansoft Terms
The Ansoft HFSS window has several optional panels: A Project ManagerProject ManagerProject Manager which contains a design tree which lists the structure ofProject Manager the project. A Message ManagerMessage ManagerMessage Manager that allows you to view any errors or warnings thatMessage Manager occur before you begin a simulation. A Property WindowProperty WindowProperty Window that displays and allows you to change modelProperty Window parameters or attributes. A Progress WindowProgress WindowProgress Window that displays solution progress.Progress Window A 3D Modeler Window3D Modeler Window3D Modeler Window which contains the model and model tree for the3D Modeler Window active design. For more information about the3D Modeler Window, see chapter 1.
Menu bar
Progress Window
Property Window
Message Manager
Project Manager with project tree
Status bar
3D Modeler Window
Toolbars
Coordinate Entry Fields
Ansoft Terms
Project Design
Design Results
Design Setup
Design Automation •Parametric •Optimization •Sensitivity •Statistical
Project Manager Window
Ansoft Terms
Vertex^ Edge
Plane
Coordinate System (CS)
Origin
Face Model
3D Modeler Window
Graphics area
Model
3D Modeler design tree
Context menu
Ansoft Terms
Grouped by MaterialGrouped by Material^ Grouped by MaterialGrouped by Material
Object ViewObject ViewObject ViewObject View
Material
Object
Object Command History
Toolbars
The toolbar buttons are shortcuts for frequently used commands. Most of the available toolbars are displayed in this illustration of the Ansoft HFSS initial screen, but your Ansoft HFSS window probably will not be arranged this way. You can customize your toolbar display in a way that is convenient for you. Some toolbars are always displayed; other toolbars display automatically when you select a document of the related type. For example, when you select a 2D report from the project tree, the 2D report toolbar displays.
Right-click the Ansoft HFSS window frame. A list of all the toolbars is displayed. The toolbars with a check mark beside them are visible; the toolbars without a check mark are hidden. Click the toolbar name to turn its display on or off To make changes to the toolbars, select the menu item Tools > CustomizeTools > CustomizeTools > CustomizeTools > Customize. See Customize and Arrange ToolbarsCustomize and Arrange ToolbarsCustomize and Arrange ToolbarsCustomize and Arrange Toolbars on the next page.
Toolbars
Ansoft HFSS panels
Toolbars
To customize toolbars: Select the menu item Tools > Customize,Tools > Customize,Tools > Customize,Tools > Customize, or right-click the Ansoft HFSS window frame and click CustomizeCustomizeCustomizeCustomize at the bottom of the toolbar list. In the Customize dialog, you can do the following: View a Description of the toolbar commandsView a Description of the toolbar commandsView a Description of the toolbar commandsView a Description of the toolbar commands
Opening a Design
This section describes how to open a new or existing project.
Opening a New projectOpening a New projectOpening a New projectOpening a New project To open a new project:To open a new project:To open a new project:To open a new project:
Opening an Existing HFSS projectOpening an Existing HFSS projectOpening an Existing HFSS projectOpening an Existing HFSS project To open an existing project:To open an existing project:To open an existing project:To open an existing project:
Opening an Existing Project from ExplorerOpening an Existing Project from ExplorerOpening an Existing Project from ExplorerOpening an Existing Project from Explorer You can open a project directly from the Microsoft Windows Explorer. To open a project from Windows Explorer, do one of the followingTo open a project from Windows Explorer, do one of the followingTo open a project from Windows Explorer, do one of the followingTo open a project from Windows Explorer, do one of the following:::: Double-click on the name of the project in Windows Explorer. Right-click the name of the project in Windows Explorer and select OpenOpenOpenOpen from the shortcut menu.
Set Solution Type
This section describes how to set the Solution Type. The Solution Type defines the type of results, how the excitations are defined, and the convergence. The following Solution Types are available: 1.1.1.1. Driven ModalDriven ModalDriven ModalDriven Modal - calculates the modal-based S-parameters. The S-matrix solutions will be expressed in terms of the incident and reflected powers of waveguide modes. 2.2.2.2. Driven TerminalDriven TerminalDriven TerminalDriven Terminal - calculates the terminal-based S-parameters of multi- conductor transmission line ports. The S-matrix solutions will be expressed in terms of terminal voltages and currents. 3.3.3.3. EignemodeEignemodeEignemodeEignemode – calculate the eigenmodes, or resonances, of a structure. The Eigenmode solver finds the resonant frequencies of the structure and the fields at those resonant frequencies.
Convergence Driven ModalDriven ModalDriven ModalDriven Modal – Delta S for modal S-Parameters. This was the only convergence method available for Driven Solutions in previous versions. Driven TerminalDriven TerminalDriven TerminalDriven Terminal – Delta S for the single-ended or differential nodal S- Parameters. EigenmodeEigenmodeEigenmodeEigenmode - Delta F
To set the solution type:To set the solution type:To set the solution type:To set the solution type:
