Patent ID: 6172654
Filing Date: 2001-01-09
Classification: H01Q

Abstract:
An antenna system having a plurality of radiating structures spaced circumferentially around a center point, each radiating structure spaced equidistant from and parallel to a next adjacent radiating structure, said system comprising:a ground surface circumferentially located around said center point and between said center point and each of said radiating structures, wherein the radius of the ground surface and the radius of the circumferentially spaced radiating structures are selected to cooperatively control side lobe levels; andmeans for phase shifting a transmission signal from certain activated ones of said activated radiating structures a selected delay amount, the phase shift amount being selected such that the transmission signal wave front leaving said certain activated radiating structures is in a relatively straight line substantially perpendicular to the direction of travel of said transmission signal, the direction of travel being normal to a point on the ground surface corresponding to one of said certain activated radiating structures.