Patent ID: 6181281
Filing Date: 2001-01-30
Classification: H01Q

Abstract:
A circularly polarized patch antenna comprising:(a) a dielectric substrate having a first surface located on one side and a second surface located on the other side;(b) an approximately rectangular patch serving as a radiating element formed on said first surface of said substrate;said patch having an aperture from which said first surface of said substrate is exposed, a first side, and a second side adjoining to said first side;said first side having a first slot that inwardly extends approximately perpendicular to said first side;said second side having a second slot that inwardly extends approximately perpendicular to said second side;(c) a ground conductor serving as a ground plane formed on said second surface of said substrate to be opposite to said patch; and(d) a feedpoint located on said patch for feeding or deriving electric power to or from said patch.