Ports are generally used for S-parameter calculation and are a combination of a mode source and monitors. In this video lesson, you will learn when and how to use the ports.
The following video demonstrates the setup of a port and s-parameter sweep in order to extract the S-parameters of a polarization converter taper.
If you want to follow along with this demonstration, please download the associated script file. Open the script file using the FDTD and run the script from the script file editor window. This will set up the objects in the simulation file so they match the starting point of the demonstration.