The Floquet port is one of the excitation types offered by Ansys HFSS in Ansys Electronics Desktop (AEDT) for electromagnetic simulations. This kind of port is used exclusively with planar-periodic structures. Some of the examples are planar phased arrays and frequency selective surfaces when these may be idealized as infinitely large. The planar phased arrays are extensively used in 5G, ADAS, and V2X applications. In this course we will introduce the Floquet port and its key features followed by analysis of an example.