HFSS15: HFSS-IE Lumped Ports

The lumped ports in HFSS-IE ports are different than those in HFSS. The HFSS-IE lumped ports impress a one volt difference between the terminal and its reference while an HFSS lumped port impresses an electric field between the terminal and its reference.

To ensure a valid port, the maximum distance from the terminal to the reference should be less than a twentieth of a wavelength. If this condition is violated, a warning occurs.

For HFSS-IE:

• For auto assignment to work you must enable Auto-assign terminals on ports on the HFSS-IE Options: General Options Tab.

Otherwise, for either HFSS or HFSS-IE:

• Manually assign a terminal. Select any connected edge(s) and/or face(s) of conductors that touch the port.

• Select Excitations>Auto Assign Terminals.

This will bring up a dialog box for you to select the objects used for “reference conductors.”