Appendix 6-1: HFSS 3D Materials - cadfamily.com€¦ · Appendix 6-1: HFSS 3D Materials ... Solve...

Release 2015.0 April 16, 2015 1 © 2015 ANSYS, Inc.

2015.0 Release

Appendix 6-1: HFSS 3D Materials

Introduction to ANSYS HFSS


HFSS Design Setup

Geometry Materials Boundaries

Excitations

Solve Setup

GUI

Solve HPC

Mesh

Design Setup


Material Manager

• Accessing Material Manager • There are multiple ways to access the Material Manager

– Properties window of the Object

– Toolbar

– Modeler Menu

– Project Manager

– Tools Menu


Material Manager

• Accessing Material Manager • From Properties Window

– Click on the Object in the Modeler window. From the Properties window, notice that “vacuum” is assigned to the object by default.

– Click on the Material value: “vacuum”, from the drop-box click on Edit... to access the Material Manager.

• From Toolbar

– Click on the Object in the Modeler window.

– From the Toolbar, click on the drop-box and click Select... to access the Material Manager


Material Manager

• Accessing Material Manager • Modeler Menu

– Click on the Object and select the menu item Modeler > Assign Material...

– Or click on the Object and then Right-click and select Assign Material... to access the Material Manager.

– Or click on the object and click the Assign Material icon in the Toolbar to access the Material Manager.

Assign Material

From toolbar


Material Manager

• Accessing Material Manager • From Project Manager

– Material Manager can be accessed by right-clicking Materials in the project tree and select Edit Library...

• Tools Menu

– Select the menu item Tools > Edit Libraries > Materials...


Assigning Material

• Assigning Material • Following options are avaiable In the Material Definition Library window

– View/Edit Materials: View or Edit the material properties

– Add Material: Create custom material

– Clone Material(s): Create a copy of the material definition

– Remove Material(s): Remove material definiton

– Export to Library: Export material library


Types of Materials

• Material Types • Simple Materials

– Dielectrics: Fields exist and are solved for inside of the 3D Object

• Causal material definitions for Lossy Dielectrics

– Conductors: Fields are solved at the surface

• Advanced Materials

– Conductors: Solve Inside

– Frequency Dependent

– Anisotropic

– Temperature Dependent

– Spatially Dependent


HFSS Design Settings

• HFSS Design Settings • Select the menu item HFSS > Design Settings…

– Click on the Set Material Override tab

• Enable material override: If an object assigned as a conductor intersects multiple dielectric objects, the conducting object will take precedence in the area of intersection. All other intersections of conductors will be treated as errors.

• Notes:

– Conducting or dielectric objects that are completely contained within another dielectric object are permitted even if this setting is disabled


HFSS Design Settings

• HFSS Design Settings • Select the menu item HFSS > Design Settings…

– Click on the Lossy Dielectrics tab

• Automatically use causal materials: Objects with constant material permittivity greater than one and dielectric loss tangent greater than zero will be treated as frequency dependent. Their actual permittivity and conductivity will be determined by the Djordjevic-Sarkar algorithm. (Disabled by Default)

• Notes:

– RF Applications: Disabled

– SI Applications: Enabled


Advanced Materials

• Advanced Materials • Conductors: Solve Inside

• Frequency Dependent Materials

• Anisotropic Materials

• Temperature Dependent Materials

• Spatially Dependent Materials


Materials: 3D Conductors

• 3D Conductors • HFSS implicitly places a finite conductivity boundary condition on the surfaces of 3D Conductors

– To set a DC Thickness for the implicit boundary condition select the menu item: HFSS > Boundaries > Assign DC Thickness.

• Solve Inside Conductors

– By default, Solve Inside is selected for all objects with a bulk conductivity less than 100000 Siemens/m and for perfect insulators

– Solve Inside can be determined by user – check or uncheck the box in the object’s Property window


Frequency-Dependent Materials

• Frequency-Dependent Materials • In the View/Edit Materials dialog

– Click on Set Frequency Dependency... Button

• Select one of the Frequency Dependent setup options available

• Here Djordjevic-Sarkar Model is selected


Anisotropic Materials

• Anisotropic Materials • Material can be defined with anisotropic dielectric properties

– In the View/Edit Materials dialog, change the Type to Anisotropic for Relative Permittivity

• Enter the permittivity tensor values in the Value boxes of the T(1,1), T(2,2) and T(3,3) rows.


Temperature Dependent Materials

• Temperature Dependent Material Properties • In the View/Edit Materials dialog, check the box for Thermal Modifier

– Select Edit from the dropbox in the Thermal Modifier for Bulk Conductivity

• Thermal modifier can be entered in as an expression or as an imported dataset if measured data is available


Spatially-Dependent Materials

• Spatially-Dependent Materials • Material can be defined as spatially-dependent, whose properties change over their length (or width or thickness).

– In the View/Edit Materials dialog, you can assign properties using cartesian coordiante [X,Y,Z] to assign the spatial properties for a material.

– Here the value of the Y dimension of the object affects the Bulk conductivity along the T(2,2) tensor.

Appendix 6-1: HFSS 3D Materials - cadfamily.com€¦ · Appendix 6-1: HFSS 3D Materials ... Solve...

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