Hfss12 Tips and Tricks Gui

© 2009 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary© 2009 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

HFSS 12.0Tips and TricksHFSS 12.0Tips and Tricks

Ansoft, LLCAnsoft, LLC

© 2009 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

Enhanced Usability

• Project Preview– Image and notes available in File Open– Image available in Windows Explorer (thumbnail view)


Enhanced Usability

• Clip plane– Interactively slice through arbitrary plane– Can view model geometry, mesh plots, field plots, etc.


Enhanced Usability

• Clip plane– Access this feature from the View menu

Original Geometry


Enhanced Usability

• Material Override– Conductors override dielectrics– Smaller objects override larger objects with same material– Avoids need for explicit subtractions


Enhanced Usability

• Select By Area– Click and drag to rubber-band select


Enhanced Usability

• Select By Area– By default, only items with external surfaces

are selected• Material filters

– Enable the Include and Exclude radio buttons

• Object name filters– Enable the Exclude and Include check

boxes• Object type filters

– Enable the check boxes for including Solids, Sheets, and/or Lines

• Hide unfiltered objects – Makes unfiltered objects transparent

after selection– Save As Default


Enhanced Usability

• Select By Variable– Helps find objects tied to variables

• Select Variable and Click OK to highlight geometry


Wrap Sheet Command

• Wrap– Wrap sheets around surfaces

• Step 1 – select sheet and surface• Step 2 – select the menu item Modeler > Surface > Wrap Sheet


Imprint

• Imprint– Imprint the geometry of one object upon another

• Step 1 – select objects of interest• Step 2 – select the menu item Modeler > Boolean > Imprint


Imprint

• Imprint – Imprint the geometry of one object upon another

• Step 3 – choose blank and tool parts and whether or not to clone tool objects

Face created from imprint


Imprint Projection

• Imprint Projection– Patch Antenna Array Imprinted on a Nosecone

• Step 1 – Both models in the same design


Imprint Projection


• Step 2 – Select target object (2D or 3D) and objects to imprint (2D)


Imprint Projection


• Step 3 – Select the menu item Modeler > Boolean > Imprint Projection > Along Direction


Imprint Projection


• Step 3 – Select the menu item Modeler > Boolean > Imprint Projection > Along Direction

• Press the F4 key for coordinate entry• Make sure that the distance selected is greater than the distance

between the antenna and nosecone


Imprint Projection


• Results in Faces of original object imprinted


Imprint Projection


• Results in Faces of original object imprinted• A separate object can be created from the Create Object From Face

Command


Imprint Projection

• Clone Objects before imprinting and projecting– Select these options to keep original objects


History Editing

• Flexible History Editing– Enable and Disable Commands– Toggle the Suppress Command Box


Generate History

• Generate History– Recreates the history for polylines, circles, or ellipses

• Step 1 – select the object• Step 2 – select the menu item Modeler > Generate History


Initial Mesh Settings

• Right-click on Mesh Operations– Curvilinear Elements on by Default – Pull points onto the true

surface box controls this

Curvilinear mesh element

HFSS 12 can use either mesh element


Initial Mesh Settings

• Right-click on Mesh Operations– Auto is the default setting– Ansoft TAU Mesh– Ansoft Classic Mesh


Setting Order Element

• Mixed Element Order– Change Order of Basis functions

to Mixed Order– HFSS auto assigns element order

to maximize solution efficiency


2D Chamfers and Fillets

• Create Chamfers and Fillets on 2D Objects– Step 1 – Select the menu item Edit > Select > Vertices– Step 2 – Select a vertex graphically– Step 3 – Select the menu item Modeler > Fillet or Chamfer


2D Fillet

• Fillet – Creates a rounded edge


2D Chamfer

• Chamfer– 45 degree cut


Region Command

• Create the air box object by using the Region command– Step 1 – Select the menu item Draw > Region


Region Command

• Pad all directions or individual directions


Region Command

• 3 Choices for Region Size– Percentage Offset– Absolute Offset– Absolute Position


User Defined Shortcuts

• User Definable Keyboard Shortcuts– Define, load or save shortcut keys to common commands


Overlay Near and Far Field Plots on Geometry

• Visualize far-field and near-field radiation patterns on model geometry– Step 1 – Select the menu item HFSS > Fields > Plot Fields >

Radiation Field– Step 2 – Select Transparency and Scale


Overlay Near and Far Field Plots on Geometry

• Visualize far-field and near-field radiation patterns on model geometry


Edit Sources with Port Post-Processing• Fields correspond with deembedding

Original geometry for ring hybrid model

Modified geometry with new port location disrupts

field behavior Operation restored by de-embedding


Edit Sources with Port Post-Processing

• Option for port post-processing to affect sources for field plots


Parametric From File

• Create an Optimetrics Parametric Setup From a File– File Format – comma separated variable, .csv or tab

delimited .txt file

Example File Format


Parametric From File

• Create a Parametric Setup From a File


New Plot Types

• Rectangular Stacked Plot– Plot all variations in stacked format

1.00 1.50 2.00 2.50 3.00 3.50Freq [GHz]

-25.00

-15.00

-5.00

-12.00

-7.00

-2.00

-22.50

-12.50

-2.50

-30.00

-20.00

-10.00

0.00

-0.50

-0.30

-0.10

-25.00

-15.00

-5.00

Curve Info

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='-0.5cm' feed_ypos='-0.5cm'

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='0cm' feed_ypos='-0.5cm'

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='0.5cm' feed_ypos='-0.5cm'

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='-0.5cm' feed_ypos='0cm'

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='0cm' feed_ypos='0cm'

dB(St(coax_pin_T1,coax_pin_T1))Setup1 : Sweep1feed_xpos='0.5cm' feed_ypos='0cm'

Ansoft LLC HFSSDesign1XY Stacked Plot 1


Plot Types Worth Mentioning

• Quick Reports– New in v11 but worth mentioning


Plot Types Worth Mentioning

• Quick Report Example– Choose S-Parameters

• Two Reports are created– S-parameters vs. Frequency– S-parameters vs. Pass

0.00 2.00 4.00 6.00 8.00 10.00Freq [GHz]

-60.00

-50.00

-40.00

-30.00

-20.00

-10.00

0.00

Y1

Ansoft LLC HFSSModel1Terminal S Parameter

Curve InfodB(St(p1_T1,p1_T1))

Setup1 : Sweep1dB(St(p1_T1,p2_T1))



Setup1 : Sweep1

1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00Pass

-8.00

-7.00

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

Y1

Ansoft LLC HFSSModel1Terminal S Parameter1

Curve InfodB(St(p1_T1,p1_T1))

Setup1 : AdaptivePassFreq='10GHz'

dB(St(p1_T1,p2_T1))Setup1 : AdaptivePassFreq='10GHz'




Streamline Plot

• New plot type for field quantities– Pick source face, choose Poynting Vector, tick Streamline option


Post-Processing Variables

• Can be modified without re-simulating the model

• Can optimize complex weights of antenna elements in phased array

Optimization of Phased Array Excitations

Synthesized Far-field Pattern Specify Desired Scan Angle and Maximum Sidelobe Level


Analytical Derivatives

• Derivatives of S-Parameters with respect to Design Variables– Identify which parameters influence output most– Focus on sensitive design parameters– Enhanced optimization

• New Tab in Solve Setup• Choose Derivative Variable in Report Setup


Plotting with Derivative Offsets

“Tune” the delta for a given variable…

• Choose Tune Reports• Tune offsets for variables included in derivative setup

Dipole ModelLengthRadius


Definable Polyline Cross Section

• Create 2D or 3D objects from polylines– Choose Cross Section Type and Size– Section is automatically swept along the polyline


Expression Cache

• New tab in Solve setup– Enables multiple convergence criteria– Use Quick Report to generate Convergence Plot

0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00Pass

1.00

10.00

100.00

1000.00

Y1

Ansoft LLC HFSSModel1Expression ConvergeCurve Info

ExprPctDelta(L1)Setup1 : AdaptivePassFreq='12GHz'

ExprPctDelta(Q1)Setup1 : AdaptivePassFreq='12GHz'

ExprPctGoal(L1)Setup1 : AdaptivePassFreq='12GHz'

ExprPctGoal(Q1)Setup1 : AdaptivePassFreq='12GHz'

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Hfss12 Tips and Tricks Gui