Patent ID: 8537067
Filing Date: 2013-09-17
Classification: G01S,H01Q

Abstract:
1. An antenna system comprising: a first antenna corresponding to a horn antenna; a second antenna corresponding to a horn antenna disposed such that the E-plane of the second antenna is co-planar with the E-plane of the first antenna and such that an effective electrical aperture of the first antenna and an effective electrical aperture of the second antenna are substantially in a common plane; and a third antenna corresponding to a horn antenna disposed such that the E-plane of the third antenna is substantially co-planar with the E-plane of the first antenna and such that an effective electrical aperture of said third antenna is substantially in the same plane as the effective electrical apertures of the first and second antennas and wherein the second and third antennas are canted toward each other from feed ends to aperture ends of the second and third antennas, wherein the second and third antennas are disposed such that a central longitudinal axis of the second antenna and a central longitudinal axis of the third antenna cross at an angle of about 10 degrees, wherein the first, second and third antennas are configured with their apertures substantially in a common plane to achieve a specific sum and difference set of radiation patterns where, for an angular range from substantially from +55° to −55° displacement from the boresight, the sum pattern is greater in signal strength than the difference pattern only at the boresight azimuth angle of 0± a defined and limited angular tolerance.