Edit Port Excitations

Many of the excitation features described in the following sections can be accessed by right-clicking the Excitations folder in the Project Manager window.

Or can be accessed by right-clicking Excitations items and Boundaries items.

AND

Select Port Excitations to open the Port Excitations window:

You can use this window to modify port excitations, including post-processing and renormalization settings. For HFSS Terminal solutions, select a terminal excitation type of Incident Voltage or Total Voltage. Selecting Total Voltage adds more columns to the table.

You can scale the sources individually through the source table or import a list of the port excitations and their settings from a text or CSV file through Load From File. This feature can help for projects with many ports. Complete these steps to directly edit the ports table.

1. Select ports and their corresponding settings fields activate beneath the table.
   1. Use the first row of the table to filter the ports to find the ones you want.
2. From the Magnitude field, enter the magnitude you want. Design variables can be used.
   Note:

   You may not enter a negative voltage. To obtain the equivalent of a negative magnitude, add or subtract 180 degrees on the phase value.

   If you use a design variable as a scaling factor note that solutions are invalidated if the variable is changed.

   At least one port should be excited (non-zero). If all ports are set to zero, a warning appears, but the values do go through.

3. From the Phase field, enter the new phase for the port. The phase of the source is changed by the value that you enter.
4. Optionally, if your solution type is driven terminal, you may specify a complex reference impedance:
   1. For the selected terminal, select Terminated. This turns off the values to the left of the check box, and enables the Resistance and Reactance fields.
   2. Enter the Resistance and the Reactance and select the units. Ohms is the default.
5. Optionally, click a check box to Include Post Processing Effects. The post-processing effect has no impact on the impedance of a terminated port, but the post processing operations (renormalization and/or deembedding) affects the plotted fields.
6. To saves a list of the port excitations in the grid and their settings in a text or CSV file, click Save to File.
7. Click OK.