Patent ID: 6031491
Filing Date: 2000-02-29
Classification: H01Q

Abstract:
Broadband printed array antenna for delivering a substantially axisymmetric main lobe about an axis passing through the center (A) of the antenna, said antenna comprising a plurality of substantially identical square radiating patches fed by microstrip lines, the feeding by said lines from the center of the antenna being a structure having a tree type feeding pattern and each one of said plurality of patches being fed at a corner by one of said lines, characterized in that the line feeding a patch at a corner partially overlaps said corner, and wherein, in at least one direction of the plane of the antenna, the distribution of said plurality of patches is not periodic so as to limit the side lobes in the radiation pattern of the antenna and to change the position of lobes of the array, wherein ones of said plurality of patches which are positioned near a periphery of the antenna in said at least one direction exhibit a spacing greater than a spacing of remaining ones of said patches positioned away from said periphery of the antenna.