Scalar quad ridged horn

TLDR: The quad ridged horn antenna of as discussed by the authors equalizes these beamwidths through of a conductive ring around the mouth of the horn antenna, which is used for exciting a reflector or an array of reflectors in two closely spaced bands, such as the Ku band.

Abstract: Quad ridged horn antennas which may be individually disposed at the focal point of a parabolic reflector, or in an antenna array of parabolic reflectors. In the field of satellite communications, focus-fed parabolic reflectors are required to be compact yet provide broadband signal services. As such, the antenna horn feed structure must be very compact and provide equally broadband services. In order to provide uniform excitation of a parabolic reflector antenna, the antenna must have equal beamwidths in the E plane and the H plane. The quad ridged horn antenna of the invention equalizes these beamwidths through of a conductive ring around the mouth of the horn antenna. Matching the E plane and the H plane beam widths results in uniform excitation of a parabolic reflector. The conductive ring is advantageously effective for exciting a reflector or an array of reflectors in two closely spaced bands, such as the Ku band.