Jacobs, Ockert BothaOdendaal, J.W. (Johann Wilhelm)Joubert, Johan2012-03-082012-03-082011Jacobs, OB, Odendaal, JW & Joubert, J 2011, 'Elliptically shaped quad-ridge horn antennas as feed for a reflector', IEEE Antennas and Wireless Propagation Letters, vol. 10, pp. 756-759.1536-122510.1109/LAWP.2011.2163050http://hdl.handle.net/2263/18411Quad-ridge horn antennas of various geometries are considered as possible candidates for a wideband reflector antenna feed. It is demonstrated that shaping the sidewalls of the ridge horns significantly improves the radiation characteristics of the horns. The conical quad-ridge horn with an elliptically shaped sidewall shows the most promise as a wideband reflector antenna feed. The radiation patterns are rotationally symmetric, and the 10-dB beamwidth is reasonably constant over a wide frequency range.en© 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.Dual polarizationHorn antennaRadio astronomyReflector antennaWidebandPostprint Article