Patch Antenna Design MAnual

8/2/2019 Patch Antenna Design MAnual

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Getting Started with HFSS:A Probe Patch Feed Antenna

ANSYS, Inc.275 Technology DriveCanonsburg, PA 15317Tel: (+1) 724 746 3304Fax: (+1) 724 514 9494General Information: [email protected] Support: [email protected]

May 2010Inventory ********


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The information contained in this document is subject t o change wit hout noti ce.Ansoft makes no warranty of any kind with regard to this material, including,but not l imit ed to, t he implied warranti es of merchantabil it y and fit ness for aparticular purpose. Ansoft shall not be liable for errors contained herein or forincidental or consequential damages in connection wit h the furnishing, perfor-mance, or use of t his materi al.

2010 SAS IP Inc., All ri ghts reserved.ANSYS, Inc.275 Technology DriveCanonsbur g, PA 15317USATel: (+1) 724-746-3304Fax: (+1) 724-514-9494

General Information: Ansoft [email protected]

Technical Suppor t : Ansof [email protected]

HFSS and Opt imet rics are registered t rademarks or t rademarks of SAS IP Inc. . Allother trademarks are the property of their respective owners.

New edit ions of t his manual incorporate all materi al updated since the previousedit ion. The manual pr int ing date, which indicates the manual s current edit ion,changes when a new edit ion is pri nted. Minor corrections and updates t hat areincorporated at reprint do not cause the date to change.Update packages may be issued between edit ions and contain addit ional and/ orreplacement pages to be merged into the manual by the user. Pages that arerearranged due t o changes on a previous page are not considered t o be revised.

Ed i t i on Dat e Sof t w ar eVersion

1 Jan 2006 10.02 May 2007 11.03 February 2009 12.04 September 2010 13.0


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Getting Started with HFSS: A Dielectric Resonator Antenna Problem

iii

Conventions Used in this GuidePlease take a moment to review how instructions and other useful infor-mation are presented in this guide.

Procedures are presented as numbered lists. A single bullet indicates

that the procedure has only one step. Bold t ype is used for the following:

- Keyboard entries that should be typed in their entirety exactly asshown. For example, copy file1 means t o type the word copy , totype a space, and then to type file1.

- On-screen prompt s and messages, names of opt ions and text boxes,and menu commands. Menu commands are of t en separat ed by car-ats. For example, click HFSS>Excit at ions>Assign>Wave Por t .

- Labeled keys on the computer keyboard. For example, PressEnter means to press the key labeled Enter .

Italic type is used for the following:- Emphasis.- The titles of publications.- Keyboard entries when a name or a variable must be typed in place

of the words in italics. For example, copy f il e name means totype the word copy , to type a space, and then to type a file name.

The plus sign (+) is used between keyboard keys to indicate that youshould press the keys at the same time. For example, PressShift+F1 means t o press the Shift key and the F1 key at the sametime.

Toolbar buttons serve as short cuts for execut ing commands. Toolbarbuttons are displayed after the command they execute. For example,

On the Draw menu, click Line means that you can click theDraw Line toolbar button to execute the Line command.

Alternate methods ortips are listed in the leftmargin in blue italictext.


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Getting Started with HFSS: A Dielectric Resonator Antenna Problem

iv

Getting HelpAnsoft Technical SupportTo contact Ansoft t echnical support st aff in your geographical area,please log on to the Ansoft corporate website, ht tp:/ / www.ansoft .com ,click the Contact but ton, and then click Support . Phone numbers and e-mail addresses for t he technical support st aff are listed. You can alsocontact your Ansoft account manager in order to obtain this information.All Ansoft soft ware f il es are ASCII t ext and can be sent convenient ly by e-mail . When report ing diff icult ies, it is ext remely helpful t o include veryspecif ic i nformat ion about what st eps were t aken or what st ages thesimulat ion reached, including soft ware f il es as applicable. This all owsmore rapid and effective debugging.

Help MenuTo access online help f rom t he HFSS menu bar, cl ick 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 HelpTo access online help f rom t he HFSS user interf ace, do one of the follow-ing: To open a help t opic about a specif ic HFSS menu command, press

Shift +F1 , and t hen click the command or t oolbar i con. To open a help t opic about a specif ic HFSS dialog box, open the dia-

log box, and then press F1 .
http://www.ansoft.com/http://www.ansoft.com/


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Contents-1

Table of Contents

1. Probe Feed Patch AntennaGetting Started . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Adding a Project and Design . . . . . . . . . . . . . . . 1-2

Setting Tool Options . . . . . . . . . . . . . . . . . . . . 1-2Set Solution Type . . . . . . . . . . . . . . . . . . . . . . 1-2Set Model Units . . . . . . . . . . . . . . . . . . . . . . . . 1-3Set Default Material . . . . . . . . . . . . . . . . . . . . . 1-3

Create Substrate . . . . . . . . . . . . . . . . . . . . . . . . 1-4Create Infinite Ground . . . . . . . . . . . . . . . . . . . 1-5Create Infinite Ground Cut Out . . . . . . . . . . 1-8

Complete the Infinite Ground . . . . . . . . . . . . . 1-9To complete the ring: . . . . . . . . . . . . . . . . . . . . 1-9Create Patch . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Assign a Perfect E boundary to the Trace . . . 1-11To assign the Perfect E boundary . . . . . . . . . . 1-11

Create the Coax . . . . . . . . . . . . . . . . . . . . . . . . . 1-12Set Default Material . . . . . . . . . . . . . . . . . . . . . 1-13This sets the default material to pec . . . . . . . . 1-14Create the Coax Pin . . . . . . . . . . . . . . . . . . . . 1-14Create the Wave port . . . . . . . . . . . . . . . . . . . 1-15Create the Probe . . . . . . . . . . . . . . . . . . . . . . . 1-18


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Getting Started with HFSS: A Probe Patch Feed Antenna

Contents-2

Set Default Material . . . . . . . . . . . . . . . . . . . . . 1-19Create Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19Create Radiation Boundary . . . . . . . . . . . . . . . 1-20Create a Radiation Setup . . . . . . . . . . . . . . . . 1-22

Analysis Setup . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23Creating an Analysis Setup . . . . . . . . . . . . . . . 1-23 Adding a Frequency Sweep . . . . . . . . . . . . . . 1-25Save Project . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

Analyze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26Model Validation . . . . . . . . . . . . . . . . . . . . . . . 1-26To start the solution process: . . . . . . . . . . . . . 1-26Solution Data . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

Create Reports . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26Create Terminal S S-Parameter Plot - Magnitude 1-26

Far Field Overlays . . . . . . . . . . . . . . . . . . . . . . . 1-29Create Far Field Overlay . . . . . . . . . . . . . . . . . 1-29


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Probe Feed Patch Antenna -1

Probe Feed PatchAntenna

This example is int ended to show you how to create, sim-ulate, and analyze a probe feed patch antenna using theAnsof t HFSS Design Environment .


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Getting Started with HFSS: Probe Feed Patch Antenna

-2 Probe Feed Patch Antenna

Getting StartedClick t he Microsoft St art button, select All Pro-grams> Ansoft>HFSS 12>HFSS 12 or double click on theHFSS 12 icon on the Windows Desktop

Adding a Project and DesignTo insert a design int o an open proj ect :1 Click Proj ect >Insert HFSS Design or on the Toolbar click

the Insert HFSS Design icon.The new HFSS design appears in t he Proj ect t ree.

Setting Tool OptionsTo set t he tool options:

Note: In order t o follow the steps out lined in t his example,verify that the following tool options are set :1 Click Tools>Opt ions>HFSS Opt ions2 In the HFSS Opt ion s dialog click the General t ab

Check Use Wizards for data input when creating newboundaries.Check Duplicate boundaries/ mesh operations with geom-etry.

3 Click OK to close the HFSS Opt ions dialog.4 Click Tools>Opt ions>Modeler Opt ions .5 The Modeler Options dialog opens with the Operation

tab.6 Check Automat icall y cover closed polyline.7 Click the Drawin g tab

Check Edit property of new primit ives.This causes the Properties window for new primitives toopen automat icall y.

8 Click the OK button

Set Solution TypeTo set t he solut ion t ype:1 Click HFSS>Solut ion Type

The Solut ion Type dialog opens.


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2 Choose Driven Terminal3 Click t he OK button

Set Model UnitsTo set the units:Click Modeler>UnitsSet Model Unit s:Select Unit s: cm

Click the OK button

Set Default MaterialTo set t he default material:1 Using the 3D Modeler Materials t oolbar, choose Select.. .

2 This opens t he Select Definition window with the Materi-


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als tab.

3 1. In the Search by Name field, t ype Rogers RT/ duroid5880 (tm).

Click the OK button

Create SubstrateTo create the substrate:1

Click Draw>Box2 Using the coordinate entry fields, enter the box position

X: -5.0 Y: -4.5, Z: 0.0, Press the Enter key3 Using the coordinate entry fields, enter the opposite cor-

ner of t he boxdX: 10.0, dY: 9.0, dZ: 0.32, Press the Enter key

To set t he name:1 In the Properties window Name field t ype: Sub1

2 Click t he OK buttonTo fit the view:


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Click View>Fit All>Active View , or press t he CTRL+D.

Create Infinite GroundTo create the infinite ground:1 Click Draw>Rectangle2

Using the coordinate entry fields, enter the rectangle posi-tionX: -5.0, Y: -4.5, Z: 0.0, Press t he Enter key

3 Using the coordinate entry fields, enter the opposite cor-ner of t he rect angle:dX: 10.0, dY: 9.0, dZ: 0.0, Press the Enter key

To set t he name:1 In the Properties window Name field t ype: Inf_GND2

Click t he OK buttonTo fit the view:


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Click View>Fit All>Active View .

Assign a Perfect E boundary to the Infinite GroundTo select t he trace:1 Click Edit>Select >By Name

The Select Obj ect dialog opens.


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2 Select t he obj ects named: Inf_GND

3 Click t he OK buttonTo assign the Perfect E boundary1 Click HFSS>Boundaries>Assign>Per fect E

The Perfect E Boundary dialog opens.2 Specify t he Name as: PerfE_Inf_GND


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Check Infinit e Ground Plane.

3 Click t he OK button

Create Infinite Ground Cut OutTo create the cut out:1 Click Draw>Circle2 Using the coordinate entry fields, enter the center posi-

tionX: -0.5, Y: 0.0, Z: 0.0, Press the Enter key

3 Using the coordinate entry fields, enter the radius:

dX: 0.16 , dY: 0.0, dZ: 0.0, Press the Enter keyTo set t he name:1 In the Properties window Name field t ype: Cut_Out2 Click t he OK button


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Complete the Infinite GroundTo select t he obj ect s Inf_GND and Cut_Out :1 Click Edit>Select >By Name

The Select Obj ect dialog opens.2 Select t he objects named: Inf_GND, Cut_Out


To complete the ring:1 Click Modeler>Boolean>Subtract

The Subtract dialog opens:2 Make the foll owing assignments:

Blank Part s: Inf_GnDTool Part s: Cut_Out


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Clone tool objects before subtract : Unchecked


Create PatchTo create t he pat ch:1 Click Draw>Rectangle2 Using the coordinate entry fields, enter the rectangle posi-

tion

X: -2.0, Y: -1.5, Z: 0.32, Press the Enter key3 Using the coordinate entry fields, enter the opposite cor-

ner of t he rect angle:dX: 4.0, dY: 3.0, dZ: 0.0, Press the Enter key


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To set t he name:1 In the Properties window Name field type: Patch2 Click t he OK button

Assign a Perfect E boundary to the Trace

To select t he trace:1 Click Edit>Select >By Name

2. The Select Obj ect dialog opens.2 Select t he obj ects named: Patch3 Click t he OK button

To assign the Perfect E boundary1 Click HFSS>Boundaries>Assign>Per fect E

The Perfect E Boundary dialog opens.2 Specify the Name: Perf E_Patch


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Create the CoaxTo set t he default material:1 Using the 3D Modeler Materials t oolbar, choose vacuum.

To create the coax:1 Click Draw>Cylinder2 Using the coordinate entry fields, enter the cylinder posi-

tionX: -0.5, Y: 0.0, Z: 0.0 Press the Enter key

3 Using the coordinate entry fields, enter the radius:dX: 0.16, dY: 0.0, dZ: 0.0 Press the Enter key


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4 Using the coordinate ent ry f ields, ent er t he height:dX: 0.0, dY: 0.0, dZ: -0.5 Press the Enter key

To set t he name:1 In the Propertie s window Name field type: Coax

2 Click t he OK button.

Set Default MaterialTo set t he default material:1 Using the 3D Modeler Materials t oolbar, choose Select.. .

2 This opens t he Select Definition window with the Materi-


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als tab.

3 Type pec in the Search by Name field.

This highlights the pec material.4 Click the OK button.

This sets t he default material t o pec

Create the Coax PinTo create the coax pin:

1 Click Draw>Cylinder2 Using the coordinate entry fields, enter the cylinder posi-


3 Using the coordinate entry fields, enter the radius:dX: 0.07, dY: 0.0, dZ: 0.0 Press the Enter key


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4 Using the coordinate ent ry f ields, ent er t he height:dX: 0.0, dY: 0.0, dZ: -0.5 Press the Enter key

To set t he name:1 In the Properties window Name field type: Coax_Pin


Create the Wave portTo create a circle that represents the port:1 Click Draw>Circle2 Using the coordinate entry fields, enter the center posi-

tionX: -0.5, Y: 0.0, Z: -0.5 Press the Enter key

3 Using the coordinat e ent ry f ields, ent er t he radius of t hecircle:dX: 0.16, dY: 0.0, dZ: 0.0 : Press the Enter key

To set t he name:1 In the Properties window Name field type: Port12 Click t he OK button


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To select t he obj ect Port 1:1 Click Edit>Select >By Name

This opens t he Select Obj ect dialog,2 Select t he obj ects named: Port 1

3 Click t he OK buttonTo assign wave port excitation1 Click HFSS>Exci tat ions>Assign>Wave Por t

The Reference Conductors for Terminals dialog opens.2 Ispecify the Name: p1


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3 Select Use port object name.

4 Leave Use as Reference unchecked and Highlight select edconductors checked.

5 Click OK.The terminal is created under Excitations for the p1 Port


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in the Project tree.

Create the ProbeTo create the probe:1 Click Draw>Cylinder2 Using the coordinate entry fields, enter the cylinder posi-


3 Using the coordinate entry fields, enter the radius:

dX: 0.07, dY: 0.0, dZ: 0.0 Press the Enter key4 Using the coordinate ent ry f ields, ent er t he height:

dX: 0.0, dY: 0.0, dZ: 0.32 Press the Enter keyTo set t he name:1 In the Propertie s window Name field type: Probe2 Click t he OK button


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Set Default MaterialTo set t he default material:1 Using the 3D Modeler Materials t oolbar, choose vacuum.

Create AirTo create the air:1 Click Draw>Box2 Using the coordinate entry fields, enter the box position

X: -5.0, Y: -4.5, Z: 0.0, Press t he Enter key3 Using the coordinate entry fields, enter the opposite cor-

ner of t he boxdX: 10.0, dY: 9.0, dZ: 3.32, Press the Enter key

To set t he name:1 In the Properties window Name field type: Air

Click the OK buttonTo fit the view:


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Click View>Fit All>Active View .

Create Radiation BoundaryPick the faces:1 Click Edit>Select>Faces2 Graphically select all of t he faces of t he Air object except

the face at Z=0.0cm. (The bottom)You can hold down the Alt key, and click t he top face, andthen hit t he b key to select a face behind. Af t erselecting the two faces behind, you can select the remain-ing three surface faces.

To create a radiation boundary1 Click HFSS>Boundaries>Assign>Radiation

The Radiation Boundary dialog opens.


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2 Name: Rad1


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Create a Radiation SetupTo define the radiation setup1 Click HFSS>Radiation>Insert Far Field Setup>Infinite1 Sphere

The Far Field Radiation Sphere Setup dialog opens.2 Select the Inf init e Sphere Tab

Name: ff_2dPhi: (Start: 0, Stop: 90, Step Size: 90)


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Theta: (St art : -180, Stop: 180, St ep Size: 2)


Analysis SetupCreating an Analysis SetupTo create an analysis setup:1 Click HFSS>Analysis Set up>Add Solut ion Set up

The Solut ion Setup dialog opens.


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2 In the General tab:Solut ion Frequency: 2.25 GHz: Maximum Number of Passes: 20Maximum Delt a S per Pass: 0.02



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Adding a Frequency SweepTo add a frequency sweep:1 Click HFSS>Analysis Set up>Add Sweep

The Add/Edit Sweep dialog opens.2 Specify the following:

Sweep Type: FastFrequency Set up Type: Linear CountStart: 1.0GHzStop: 3.5GHzCount: 201Save Fields: Checked


Save ProjectTo save t he proj ect :1 In an Ansoft HFSS window, click Fil e>Save As .2 From the Save As window, type the Filename:

hfss_probepatch3 Click the Save but ton


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AnalyzeModel ValidationTo validat e t he model:1

Click HFSS>Validat ion Check2 Click the Close button

Note: To view any errors or warning messages, use theMessage Manager.

To start the solution process:1 Click HFSS>Analyze All

Solution Data

To view t he Solut ion Data:1 Click HFSS>Result s>Solut ion Data

The Solut ion Data dialog opens.To view the Profile:

Click the Profile Tab.To view t he Convergence:

Click t he Convergence TabNote: The default view is for convergence is Table Table.

Select the Plot radio button to view a graphical represen-tations of the convergence data.

To view the Matrix Data:Click t he Matrix Data TabNote: To view a real-time update of the Matrix Data, sett he Simulation t o Setup1, Last Adapt ive

2 Click the Close button

Create ReportsCreate Terminal S S-Parameter Plot - MagnitudeTo create a report:1 Click HFSS>Results>Create Terminal Solution Data

Report.

The Reports window opens.


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2 Make the following select ions:Solut ion: Setup1: Sweep1Domain: SweepCategory: Terminal S Paramet er

Quantity: St(Port1_T1,Port1_T1),Function: dB

3 Click the New Repor t button


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4 Click the Close button.

5 Select the trace on the plot .6 Right click to display the shortcut menu and click

Marker >Add Minimum .

A minimum marker (m1) appears on the trace, and a


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marker table lists the x and y coordinate values.

Far Field OverlaysCreate Far Field OverlayTo create a 2D polar far field plot :1 Click HFSS>Results>Create Far Fields Report>Radiation

Pattern.

The Reports dialog appears.2 Specify the following:

Solut ion: Setup1: Sweep1Geomet ry: f f_2dIn the Trace tab:Select Theta the primary sweep.Category: GainQuantity: GainTotalFunction: dB


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3 Click New Repor t .

Patch Antenna Design MAnual

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