Patent ID: 6756939
Filing Date: 2004-06-29
Classification: H01P,H01Q,H04B

Abstract:
A phased array antenna comprising:an input; a feed network electrically coupled to the input; a plurality of radiating elements; a plurality of voltage tunable phase shifters for receiving signals from the feed network and providing phase shifts for the signals prior to transmitting the signals to the radiating elements, wherein each phase shifter includes: a microstrip line mounted on a composite substrate having a tunable dielectric layer; first and second ports respectively adjacent to first and second ends of the microstrip line; first and second matching elements respectively positioned at the first and second ports; and biasing electrodes for applying control voltage to the tunable dielectric layer, the biasing electrodes forming a gap extending parallel to the microstrip line on a first side of the tunable dielectric layer opposite the microstrip line; and a controller for controlling the phase shift provided by the phase shifters.