Noun
English Wikipedia has an article on:microstripWikipedia
microstrip (plural microstrips)
A thin conducting strip, separated from another conductor by a layer of dielectric, used to conduct microwaves
A microstrip patch, placed above a ground plane, forms a resonant cavity having magnetic wall-boundary on its four sides. Source: Internet
A port in this context is a point where an external waveguide or transmission line (such as a microstrip line or a coaxial cable ), connects to the device. Source: Internet