Abstract: A miniature interrogator antenna assembly including: a housing; a first miniature horn antenna in the housing having a first aperture; a second miniature horn antenna in the housing having a second aperture. The first and second miniature horn antennas are arranged in a canted configuration and are joint at a front of the assembly to form combined apertures at the front of the assembly. The antenna assembly further includes: a splitter/combiner having a matching portion, where the matching portion is positioned in the housing in such a way that an apex of the matching portion points to the front of the assembly; a plurality of annular grooves formed around the combined apertures at the front of the assembly; a sum input port coupled to a first waveguide with an H-plane bend feeding the splitter/combiner; and a difference input port coupled to a second waveguide feeding the splitter/combiner directly.

Abstract: A miniature interrogator antenna assembly including: a housing; a first miniature horn antenna in the housing having a first aperture; a second miniature horn antenna in the housing having a second aperture. The first and second miniature horn antennas are arranged in a canted configuration and are joint at a front of the assembly to form combined apertures at the front of the assembly. The antenna assembly further includes: a splitter/combiner having a matching portion, where the matching portion is positioned in the housing in such a way that an apex of the matching portion points to the front of the assembly; a plurality of annular grooves formed around the combined apertures at the front of the assembly; a sum input port coupled to a first waveguide with an H-plane bend feeding the splitter/combiner; and a difference input port coupled to a second waveguide feeding the splitter/combiner directly.

Abstract: 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 an such that an aperture of the first antenna and an 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 aperture of said third antenna is substantially in the same plane as the aperture of the first and second antennas and wherein the second and third antennas are canted toward each other.

Abstract: 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 an such that an aperture of the first antenna and an 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 aperture of said third antenna is substantially in the same plane as the aperture of the first and second antennas and wherein the second and third antennas are canted toward each other.