A lightweight, rectangular, corrugated-horn antenna constructed from sheet metal is described. Over a 1.3-1.7 GHz operating band, its half-power beamwidth is approximately20 theE-plane and varies from1713 theH-plane. Quarter-wave choke slots at the aperture help to reduce theE-plane sidelobes below -55 dB at angles greater than90, while theH-plane sidelobes lie in that range both with and without choke slots. Return loss throughout the operating band is -25 dB or below. Critical dimensions are provided, together with useful guidelines for designing similar antennas.
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Witebsky et al. (1987) studied this question.
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