Setting Uniform Temperature in HFSS 3D Layout

To set a uniform temperature and enable feedback for use two-way coupling:

1. Click the HFSS 3D Layout > Set Temperature command to display the Set Temperature window. Also, right-click the design in the Project Tree and select.

This window allows you to set a global design temperature, which is used to modify the conductivity of metallization during the DC IR simulation. In general, the higher the temperature, the lower the conductivity (implying a higher resistance).



2. To enable the editing features, check Include Temperature Dependence.
3. Enter a value for Temperature, or an existing variable in the field.
4. Make a selection on the units drop-down menu.
5. If needed, Set Default to make the specified values the default.
6. To enable coupling with thermal designs, select Enable Feedback.

You can perform two-way coupling between an HFSS 3D Layout design with an SIwave DC IR solution setup and an Icepak design in Electronics Desktop. In an Icepak design, you can specify the number of coupling iterations to be run. DC IR loss data calculated by the source HFSS 3D Layout design is consumed by Icepak when calculating thermal data in the current coupling iteration. The thermal data is then consumed by the source design in the next coupling iteration's calculation.

7. To close the window and accept the changes, click OK.