Patent ID: 6333719
Filing Date: 2001-12-25
Classification: H01Q

Abstract:
A tunable antenna comprising:a stacked assembly including:a feeder-resonator disposed on a layer of ferroelectric material;a radiator that includes an electrically conductive layer disposed on a layer of dielectric material and that is disposed above said feeder resonator;a support structure that supports said radiator above said layer of ferroelectric material with an air gap therebetween; andwherein said feeder-resonator is located within said air gap, wherein electromagnetic energy is coupled from said feeder-resonator via said air gap to said radiator, wherein said stacked assembly exhibits a resonant frequency that is tunable in response to a bias voltage applied to said ferroelectric layer, and wherein said layer of dielectric material has a higher permittivity than that of said layer of ferroelectric material.