Compact, Dual Circularly Polarized Satellite Horn Antenna and Feed Network Covering Full SATCOM Ka-Band

In this paper, compact, dual circularly polarized horn antenna and feed network covering the full SATCOM Ka frequency range including the military bands are presented. The design is intended to be used on the satellite side of a SATCOM link. As shown in Table I, simulated performance exhibits better than 30 dB cross-polarization discrimination (XPD), 30 dB return loss and 20 dB in-band isolation for both 17.7-21.2 GHz (transmit) and 27.5-31 GHz (receive) bands. The antenna section consists of a corrugated horn antenna and a radial mode converter, while the feed network section consists of six-port and five-port orthomode junctions, two different types of low-pass filters, H-plane bends, septum polarizers, taper, and adapters.