Imprint Projection - Ansys

HFSS 12.0 

Tips and Tricks 

Ansoft, LLC 

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

Enhanced Usability 

• Project Preview 

– Image and notes available in File Open 

– Image available in Windows Explorer (thumbnail view) 



• Clip plane 

– Interactively slice through arbitrary plane 

– Can view model geometry, mesh plots, field plots, etc. 



• Clip plane 

– Access this feature from the View menu 

Original Geometry 



• Material Override 

– Conductors override dielectrics 

– Smaller objects override larger objects with same material 

– Avoids need for explicit subtractions 



• Select By Area 

– Click and drag to rubber-band select 



• 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 



• 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 





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

(2D) 





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

Projection > Along Direction 





• 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 





• Results in Faces of original object imprinted 





• Results in Faces of original object imprinted 

• A separate object can be created from the Create Object From Face 

Command 



• 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 

HFSS 12 can use 

either mesh element 

Curvilinear 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 



• Pad all directions or individual directions 



• 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 

Curve Info 

dB(St(coax_pin_T1,coax_pin_T1)) 

Setup1 : Sweep1 

feed_xpos='-0.5cm' feed_ypos='-0.5cm' 



feed_xpos='0cm' feed_ypos='-0.5cm' 



feed_xpos='0.5cm' feed_ypos='-0.5cm' 



feed_xpos='-0.5cm' feed_ypos='0cm' 



feed_xpos='0cm' feed_ypos='0cm' 



feed_xpos='0.5cm' feed_ypos='0cm' 

Ansoft LLC XY Stacked Plot 1 

HFSSDesign1 

1.00 1.50 2.00 2.50 3.00 3.50 

Freq [GHz] 

© 2009 ANSYS, Inc. All rights reserved. 37 ANSYS, Inc. Proprietary 

-5.00 

-15.00 

-25.00 

-2.00 

-7.00 

-12.00 

-2.50 

-12.50 

-22.50 

0.00 

-10.00 

-20.00 

-30.00 

-0.10 

-0.30 

-0.50 

-5.00 

-15.00 

-25.00

Plot Types Worth Mentioning 

• Quick Reports 

– New in v11 but worth mentioning 


-10.00 

-20.00 

-30.00 

-40.00 

-50.00 

-60.00 

Plot Types Worth Mentioning 

• Quick Report Example 

– Choose S-Parameters 

• Two Reports are created 

– S-parameters vs. Frequency 

0.00 

– S-parameters vs. Pass 

Ansoft LLC HFSSModel1 

0.00 

Y1 

Terminal S Parameter 

Curve Info 

dB(St(p1_T1,p1_T1)) 








0.00 2.00 4.00 6.00 8.00 10.00 

Freq [GHz] 

Ansoft LLC Terminal S Parameter1 

HFSSModel1 

1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 

Pass 


Y1 

-1.00 

-2.00 

-3.00 

-4.00 

-5.00 

-6.00 

-7.00 

-8.00 

Curve Info 


Setup1 : AdaptivePass 

Freq='10GHz' 



Freq='10GHz' 



Freq='10GHz' 



Freq='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 resimulating 

the model 

• Can optimize complex weights 

of antenna elements in phased 

array 

Specify Desired Scan Angle and 

Maximum Sidelobe Level 

Optimization of Phased Array Excitations 

Synthesized Far-field Pattern 


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 

• Choose Tune Reports 

• Tune offsets for variables included in derivative setup 

“Tune” the delta 

for a given 

variable… 

Dipole Model 

Length 

Radius 


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 

Ansoft LLC HFSSModel1 

1000.00 

Curve Info 

ExprPctDelta(L1) 


Freq='12GHz' 

ExprPctDelta(Q1) 


Freq='12GHz' 

ExprPctGoal(L1) 


Freq='12GHz' 

ExprPctGoal(Q1) 

100.00 


Freq='12GHz' 

Y1 

1.00 

0.00 2.00 4.00 6.00 8.00 10.00 

Pass 

12.00 14.00 16.00 18.00 20.00 


10.00 

Expression Converge

Imprint Projection - Ansys

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