Patent ID: 8643565

Claim:
A radio frequency (RF) feed structure comprising: a substrate; at least one port coupled to the substrate and arranged and configured for selective coupling with a transmission line, the port providing an electrical connection with a signal conductor of the transmission line and an electrical connection with a ground conductor of the transmission line; a conductive layer arranged on at least one surface of the substrate, the conductive layer including at least a first portion and a second portion, wherein when the transmission line is coupled to the port, the first portion is electrically coupled to the signal conductor through the port, the first portion is arranged and configured to feed the signal to a feedpoint of a signal layer of an antenna, and the second portion is electrically coupled to the ground conductor through the port; and a ground plane interface configured to make an electrical connection with a ground plane of a radio frequency antenna, to electrically couple the ground plane with the second portion of the conductive layer and the ground conductor of the transmission line.