发明名称 DUAL-BAND EQUAL-BEAM REFLECTOR ANTENNA SYSTEM
摘要 A satellite antenna system employing a dual-band feed horn and dual-ban d beam forming network. The feed horn provides a common aperture for both satellite uplink and downlink communications signal. The feed horn includes corrugatio ns on an inside surface defining two sets of alternating channels having different depths to create circularly symmetric beams for the uplink and downlink signals. The antenna system includes at least one reflector, where the reflector shape, position, and th e configuration of the feed horn, is determined so that the mainlobe of the lower frequency downlink feed signal illuminates the entire reflector, and the mainlobe of the higher frequency uplink feed signal illuminates an inner portion of the reflector. The first sidelobes of the higher frequency feed signal illuminate the outer portion of the reflector s o that the uplink and downlink antenna signals have the same beamwidth, and thus cover the same cell size on the Earth.
申请公布号 CA2396265(A1) 申请公布日期 2003.02.28
申请号 CA20022396265 申请日期 2002.07.31
申请人 TRW INC. 发明人 CHOUNG, YOUN H.;TOLAND, BRENT T.;HAMADA, JAMES S.;MINASSIAN, VRAGE;CHAN, RONALD Y.
分类号 H01Q1/28;H01Q3/26;H01Q5/00;H01Q13/02;H01Q19/17;H01Q19/19;H01Q21/30;H04B7/185;(IPC1-7):H01Q21/30 主分类号 H01Q1/28
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