Antenna Port for Microstrip simulation on CST

Hello all, I am new to antenna design... I am wondering if anyone could explain about the port creation in a microstrip patch antenna? What exactly is port? What does the port mean in a physical sense, are they suppose to be the same dimension as suggested by the design rule? if that the case, what should designer do for micro structure antenna? Thanks

You should regard a "port" as the point where you would connect an RF cable to the antenna structure. I would recommend to use lumped ports in simulation.