HFSS15: Define the Relative Coordinate System using a Post Processing Variable

First create a post processing variable that you can use to define a relative coordinate system.

1. Use HFSS>Design Properties to display the Design Properties dialog.

2. Click Add Variable, to display the Properties dialog for defining a Design Variable. The example project uses the name "PhaseCenterZ".

Designate the type as Post Processing variable:

Set the Unit Type as Length, the Units. This example uses "in" for the units and the value as 1.

Click OK.

The PhaseCenterZ variable is listed as a Local variable with the Post Processing Type.

3. You can use the variable to define an offset relative coordinate system.

Use Modeler>Coordinate System>Create>Relative CS>Offset to create a coordinate system, using the variable as the z coordinate. You can verify the Properties.

In the example, the PhaseCenterZ variable defines the z coordinate of the origin for Phase Center CS.

This variable allows you to change definition of the coordinate system during the optimization process without invalidating solved solution.

Next , Use the Relative Coordinate System in a Far Field Setup Calculation.