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Section 3: Projects, HFSS Design Flow
Getting Started: Ansoft HFSS 8.0
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Synopsis
The Project Manager Definitions Directories Project Configuration Management
The HFSS Executive Level Executive Window
HFSS Design Flow Stages Pre-processing Solution Post Processing
My E-mail: [email protected]
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The Maxwell Project Manager
Analytical modeling efforts using Ansoft software are referred to as “projects”
A “project” consists of files which define a model, files which comprise its solution, and all files which comprise data gathered from that solution
Projects are created, accessed, and managed via the Project Manager button on the main Maxwell toolbar
Starting the Maxwell Toolbar:
PC: Use shortcut or Run: “maxwell.exe” from install directory
UNIX: Type “maxwell &” in Xterm window
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The Project Manager Interface
The Project List: Create, Rename, Copy, Move, and Delete Projects
The Directory List: Manage Directories and Directory Aliases for Project Storage
Data regarding the currently selected project
Open the currently selected project
Recover selected project from any interrupted condition
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Project Manager Basics
Project Directories can be existing disk directories on your hard drive, or created as subdirectories to existing directory structure
Do not confuse a “Project Directory”, which contains many projects, with “the project’s directory”, the folder containing all the files for a single project. The latter will have the form “projectname.pjt”
When moving or copying projects, begin in the destination directory Move and copy permits you to browse to the location of the source;
where the command was begun defines the directory the operation will move/copy the project to.
A project’s files are managed so that the setup files must go with any existing mesh and solution data!!!
This is intentional, to preserve the configuration from which any solution was derived.
Editing a project’s setup files may delete meshes and solutions! To create a variation of an existing solved project, copy the original, and
work on the copy! Recover should unlock projects in the event of access errors Reclassify allows updating of projects to newer versions of the same
software
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HFSS Executive Window
This is the starting window seen when opening an HFSS Project.
The checklist at the left accesses project construction steps and reflects current status.
Buttons on the checklist reflect the HFSS project design flow
Design Flow Checklist
Executive Display Options
Executive Display Window
Model View Display Options
Solution Monitoring Window
NOTE: All 3D Display windows in HFSS will have a BLACK background. This is not currently editable in HFSS Version 7. Graphical window images have been inverted for this and all subsequent training presentations for better paper reproduction.
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HFSS Design Checklist
1. Define type of project
Driven is excited Eigenmode is not
2. Construct the geometry to be analyzed.
3. Define materials used in the model.
4. Define boundary conditions and source excitations for the model
(Optional Step: Define outputparameters for emissions
problems; access ports-onlysolutions.)
5. Set up solution parameters
6. EXECUTE SOLUTION!
7. Review results of analysis Matrix Data and Plot access S-parameters, etc. Fields accesses field visual- ization and calculations
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HFSS Analysis Design Flow
Executive Window ‘checklist’ reflects 3 stages of Project design flow
PRE-PROCESSING All steps necessary to define the problem space and its characteristics
Geometry Construction Material Assignment (set Volume conditions) Source/Boundary Assignment (set Surface conditions) Solution ‘setup’ (desired frequency range, convergence, etc.)
SOLUTION The actual solution of the problem defined in Pre-Processing above.
Most of this step is ‘automatic’ Excitation Solution Meshing and Matrix Solution
POST-PROCESSING Evaluation of the results of the model
Plot S-parameters, other circuit parameters, field quantities, etc. Generate antenna patterns, RCS response, etc.
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HFSS Analysis Design Flowchart
Construct Geometry
(User Input)
Define Volume Conditions
(User Input)
Define Surface Conditions
(User Input)
2D Excitation Solution
(Automatic)
3D Mesh Generation
(Automatic, User Input Optional)
Solve 3D Matrix
(Automatic)
View/Plot S-Parameters
(User Input)
View/Plot Fields
(User Input)
PRE-PROCESSING SOLUTION POST-PROCESSING
Define Solution Requirements
(User Input)