Patent ID: 8786507

Claim:
An antenna assembly for a wireless communication device that produces a radio frequency signal, said antenna assembly comprising: a substrate of dielectric material and having a first surface and a second surface; a ground plane formed by a layer of electrically conductive material on the first surface; an antenna disposed on the substrate proximate to the ground plane and having a structure that is resonant at a first frequency, wherein the antenna has a port for receiving the radio frequency signal; and at least one metal-dielectric structure disposed proximate to the antenna and resonating at a given frequency, wherein each metal-dielectric structure is located at a position at which an electric current produced by a signal from the antenna has a current density greater than eighty percent of a maximum current density level resulting from the signal, and wherein the at least one metal-dielectric structure alters resonance of the antenna to resonate at a second frequency instead of the first frequency.