HFSS15: Specifying the Solution Quantity to Evaluate for Statistical Analysis

When you add a statistical setup, you can identify one or more solution quantities to evaluate. The solution quantities are specified by mathematical expressions that are composed of basic quantities. When you view the results, HFSS displays the distribution of the solution quantities.

1. In the Calculations tab of the Setup Statistical Analysis dialog box, click Setup Calculations.

The Add/Edit Calculations dialog box is displayed, allowing you to define one or more mathematical expressions for statistical evaluation.

2. In the Context section of the dialog:

• Select the Report Type with a pull-down selection list containing the available types for this design.

• Select the Solution from the drop down selection list. This lists the available setups and sweeps. As a minimum, the LastAdaptive solution is available.

• Select the Geometry from the drop down selection list or select none (the default). This modifies the list of quantities available to the ones that apply to the specific geometry.

• When selecting a geometry, you may also be required to specify a point within the geometry where the calculation is to be performed.

3. The Output Variables button opens the Output Variables dialog box allowing you to create special output variables to be used in the output parameter.

4. The Calculation Expression field in the Trace tab is used to enter the equation to be used for the solution quantities. To enter an expression, you may type it directly into the field or use the Category, Quantity, and Function lists as follows:

• Select the Category, these depend on the Solution type and the design. This lets you specify the category of information to be used in the output parameter.

• Select a Quantity from the list. Available quantities depend upon the Solution type, as well as the Geometry and Category selection. Selecting a Quantity automatically enters it into the Calculation Expression field.

• Select a Function to apply to the value in the calculated expression.

• For swept variables, the RangeFunction button opens the Set Range Function dialog to apply functions to the expression that apply over the sweep range.

5. The Calculation Range tab applies to swept variables and allows you to specify the range of the sweep over which to apply the calculation.

6. When the desired Calculation Expression has been obtained, click the Add Calculation button to add the entry to the calculation table in the Setup Statistical Analysis dialog box. You may add multiple entries to the table simply by changing the Calculated Expression and using the Add Calculation button.

7. To update or edit a selected cost function, enter the desired Calculation Expression and click the Update Calculation button.

8. Click Done to return to the Setup Statistical Analysis dialog box.