Patent ID: 6396440
Filing Date: 2002-05-28
Classification: H01Q

Abstract:
A phased array antenna apparatus comprising:a plurality of radiation elements aligned and arranged to be electromagnetically driven; a power supply which supplies power to said radiation elements; a power distributor which distributes power supplied from said power supply to said radiation elements, said power distributor having a pair of conductive plates arranged parallel to each other thereby forming a radial waveguide; a feed probe arranged on one of said conductive plates to radiate an electromagnetic wave into said radial waveguide in accordance with said power supplied from said power supply; a plurality of electromagnetic couplers arranged on the other of said conductive plates in correspondence with said radiation elements, said electromagnetic couplers extracting the electromagnetic wave radiated from said feed probe, said electromagnetic couplers being in the form of openings disposed within said other of said conductive plates, said openings having an area which increases as a distance between a respective coupler and said feed probe increases; and a plurality of phase shifters which control a phase of the electromagnetic wave extracted by said electromagnetic couplers and which supply the electromagnetic wave to said radiation elements.