Getting Started with
HFSS
Probe Feed Patch Antenna
ANSYS, Inc.
275 Technology Drive
Canonsburg, PA 15317
USA
Tel: (+1) 724-746-3304
Fax: (+1) 724-514-9494
General Information: [email protected]
Technical Support: [email protected]
November 2012
TM
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Getting Started with
HFSS
Probe Feed Patch Antenna
ANSYS, Inc. 275 Technology Drive Canonsburg, PA 15317 USA Tel: (+1) 724-746- Fax: (+1) 724-514- General Information: [email protected] Technical Support: [email protected]
November 201 2
TM
The information contained in this document is subject to change with- out notice. ANSYS makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of mer- chantability and fitness for a particular purpose. ANSYS 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.
ANSYS, Inc, is a UL registered ISO 9001:2008 company.
Unauthorized use, distribution, or duplication is prohibited. © 201 2 SAS IP, Inc. All rights reserved.
ANSYS, HFSS, and Optimetrics are registered trademarks or trade- marks of SAS IP, Inc. All other trademarks are the property of their respective owners.
New editions of this manual incorporate all material updated since the previous edition. The manual printing date, which indicates the man- ual’s current edition, changes when a new edition is printed. Minor corrections and updates that are incorporated at reprint do not cause the date to change. Update packages may be issued between editions and contain addi- tional and/or replacement pages to be merged into the manual by the user. Pages that are rearranged due to changes on a previous page are not considered to be revised.
E d i t i o n Da te S o f t w a r e Ve rs io n 1 May 2003 9 2 June 2005 10 3 June 2007 11 4 Sept 2009 12 5 October 2010 13. 6 August 2011 14.
Getting Started with HFSS: Probe Feed Patch Antenna
iv
Getting Help
ANSYS Technical Support
To contact ANSYS technical support staff in your geographical area, please log on to the ANSYS corporate website, https:// www1.ansys.com. You can also contact your ANSYS account manager in order to obtain this information. All ANSYS software files are ASCII text and can be sent conve- niently by e-mail. When reporting difficulties, it is extremely helpful to include very specific information about what steps were taken or what stages the simulation reached, including software files as applicable. This allows more rapid and effec- tive debugging.
Help Menu
To access online help from the HFSS menu bar, click Help and select from the menu:
- Contents - click here to open the contents of the online help.
- Seach - click here to open the search function of the online help.
- Index - click here to open the index of the online help.
Context-Sensitive Help
To access online help from the HFSS user interface, do one of the following:
- To open a help topic about a specific HFSS menu com- mand, press Shift + F1 , and then click the command or toolbar icon.
- To open a help topic about a specific HFSS dialog box, open the dialog box, and then press F.
Table of Contents
Introduction 1-
1 Introduction
This document is intended as supplementary material to HFSS for beginners and advanced users. It includes instructions to create, simulate, and analyze a probe feed patch antenna.
This chapter contains the following topics:
Sample Project - Probe Feed Patch Antenna
Getting Started with HFSS: Probe Feed Patch Antenna
1-2 Introduction
Sample Project: Patch Antenna
This example is intended to show you how to create, simu- late, and analyze a probe feed patch antenna using HFSS.
Figure 1. Probe Feed Patch Antenna
Getting Started with HFSS: Probe Feed Patch Antenna
1-2 Set Up The Project
Launch HFSS
Store a shortcut of the HFSS application on your desktop.
1 Double-click the HFSS icon to launch the application.
Figure 1. HFSS opens Note If the application does not list the folder, go to File and click New. If the Project Manager window does not appear, go to View and enable it.
Set Tool Options
Verify the options under the Tools menu as follows:
1 Click Tools>Options>HFSS Options.
The HFSS Options dialog box appears.
Figure 2. Assignment Options
2 On the General tab ensure all Assignment Options are
checked and click OK to close the dialog box.
3 Click Tools>Options>Modeler Options.
The Modeler Options dialog box appears.
4 On the Operation tab check Automatically cover closed
polylines.
5 On the Drawing tab check Edit properties of new primi-
Getting Started with HFSS: Probe Feed Patch Antenna
Set Up The Project 1-
tives and click OK. Note This option causes a Properties dialog box to appear whenever you create a new object.
Insert HFSS design
The icon below represents the Insert HFSS design ( IHd ) option.
Figure 3. IHd
1 Expand the project tree.
2 If IHd is present, proceed to rename and save the project
and if it is absent click the IHd icon to include it. Note Inclusion of IHd modifies the project and hence the asterisk appears on Project.
Figure 4. IHd included
3 Click Project1* , hit F2 , rename the project and save it.
Set Model Units (cm)
Define the model units as follows:
1 On the toolbar, click Modeler>Units.
The Set Model Units dialog box appears.
2 Select cm (centimeters) from the Select units drop-down
menu, and click OK.
Set Up The Project 1-
1 Set Up The Project
This chapter contains the following topics:
Create Substrate
Create Infinite Ground
Assign Perfect E Boundary to the Ground
Create Infinite Ground Cut-Out
Complete the Infinite Ground
Complete the Ring
Create Patch
Assign Perfect E Boundary to the Patch
Create the Coax
Create the Coax Pin
Assign Excitation
Create the Probe
Create Air Body
Assign Radiation Boundary
Create Radiation Setup
Getting Started with HFSS: Probe Feed Patch Antenna
1-2 Set Up The Project
Create Substrate
To create the substrate, you will draw a box freehand as fol- lows.
1 Click Draw > Box.
The cursor is accompanied by a black square box.
2 Click inside the Modeler window to establish the x,y axe-
and drag the mouse to draw the rectangle.
3 Click the mouse to establish the z axis and drag the mouse
along the z-axis to draw the height, and click the mouse to complete the box. The Properties dialog box appears.
Figure 1. Command dialog box
4 On the Command tab edit the fields as shown in Figure 1
and on the Attribute tab rename the box to Sub1 and select Edit from the Materials drop down menu. The Select Definition dialog box appears See Figure 2.
5 Type Rogers RT/duroid 5880 (tm) in the Search By Name
field and select the option when it appears in the list_._
6 Click OK to close the View/Edit Materia l dialog box and
repeat the same on the other dialog boxes to exit.
7 Click View > Fit All > Active View.
Note As you continue to build the model, whenever you want to fit the view do Ctrl+D.
Getting Started with HFSS: Probe Feed Patch Antenna
1-4 Set Up The Project
Create Infinite Ground
To create the infinite ground, you will draw a rectangle as fol- lows.
1 Click Draw > Rectangle
2 Click inside the modeler window to establish the x,y axes.
3 Drag along the x, y axes to draw the rectangle.
The Properties dialog box appears.
4 Click OK to accept the values in the Properties dialog box.
5 Double-click CreateRectangle from the history tree and
edit the fields on the Command dialog box as in Figure 4.
6 Double-click Rectangle from the history tree and enter
Inf_GND in the Name field and click OK.
Figure 4. Infinite Ground Command dialog
Getting Started with HFSS: Probe Feed Patch Antenna
Set Up The Project 1-
.
Figure 5. Infinite Ground plane
Assign Perfect E boundary to the Ground
1 Click Edit>Select>By Name
The Select Object dialog box appears.
2 Select the object Inf_GND and click OK.
.
Figure 6. Select Object dialog box
3 Right click Assign Boundary>Perfect E
The Perfect E Boundary dialog box appears.
Getting Started with HFSS: Probe Feed Patch Antenna
Set Up The Project 1-
Figure 8. Ground Cut Out Command dialog
Complete the Infinite Ground
To select the objects Inf_GND and Cut_Out :
1 Click Edit>Select>By Name
The Select Object dialog box appears.
2 Select Inf_GND and Cut_Out and click OK.
Figure 9. Select Object dialog box
To complete the ring
1 Click Modeler>Boolean>Subtract
The Subtract dialog box appears.
2 Set the fields as in Figure 10 and click OK.
Getting Started with HFSS: Probe Feed Patch Antenna
1-8 Set Up The Project
Figure 10. Subtract dialog box
Create Patch
We will describe another method to draw a rectangle here.
1 Click Draw>Rectangle
2 Use the fields on the status bar, and enter the co-ordi-
nates of the center as follows: X: -2.0 , Y: -1.5 , Z: 0.32 and press Enter.
3 Use the fields and enter the opposite corner of the rectan-
gle as follows: dX: 4.0 , dY: 3.0 , dZ: 0.0 and press Enter. The Properties dialog box appears.
4 Click Attribute and enter Patch in the Name field and
click OK.