Shaped dual reflector antenna system for generating a plurality of beam
coverages
    1.
    发明授权
    Shaped dual reflector antenna system for generating a plurality of beam coverages 失效
    形状的双反射器天线系统,用于产生多个光束覆盖

    公开(公告)号:US5546097A

    公开(公告)日:1996-08-13

    申请号:US994834

    申请日:1992-12-22

    CPC分类号: H01Q25/007

    摘要: A dual-reflector antenna system (40) is provided for generating a shaped main beam radiation pattern (20) and at least one additional secondary spot beam radiation pattern (30,32). The antenna system (40) includes a main shaped reflector (10) having a shaped reflective surface (11) operatively coupled to a subreflector (12) for communicating therewith. A main feed horn (14) communicates directly with the subreflector (12) so as to reflect first energy to and from the main reflector (10) within a shaped beam radiation pattern (20). In a preferred embodiment, the subreflector (12) has an ellipsoidal reflective surface (13) which communicates directly with the main reflector (10) via an inverted reflective path (17) which has a converging focal point (18). One or more auxiliary feed horns (24,26) are operatively coupled directly to the main reflector so as to directly communicate therewith and reflect second energy within one or more additional radiation patterns (30,32). The first and second feed horns (24,26) are preferably located separate from the reflective path (17) so as to avoid interference therewith. In an alternate embodiment, a subreflector (12') with a hyperboloidal reflective surface (13') may be used.

    摘要翻译: 提供双反射器天线系统(40),用于产生成形的主光束辐射图(20)和至少一个附加次点光束辐射图(30,32)。 天线系统(40)包括主成形反射器(10),其具有可操作地耦合到子反射器(12)的成形反射表面(11),用于与其连通。 主馈电喇叭(14)直接与子反射器(12)通信,以便在成形的射束辐射图案(20)内将第一能量反射到主反射器(10)。 在优选实施例中,副反射器(12)具有经由具有会聚焦点(18)的反向反射路径(17)与主反射器(10)直接连通的椭圆面反射表面(13)。 一个或多个辅助馈电喇叭(24,26)可操作地耦合到主反射器,以便与其直接通信并将第二能量反射到一个或多个附加辐射图案(30,32)内。 第一和第二馈电喇叭(24,26)优选地与反射路径(17)分离,以避免与其的干涉。 在替代实施例中,可以使用具有双曲面反射表面(13')的子反射器(12')。