Antenna system
    15.
    发明授权
    Antenna system 失效
    天线系统

    公开(公告)号:US4742359A

    公开(公告)日:1988-05-03

    申请号:US889116

    申请日:1986-07-22

    IPC分类号: H01Q11/08 H01Q19/15 H01Q1/36

    CPC分类号: H01Q19/15 H01Q11/08

    摘要: A parabolic antenna for SHF band having a primary feeder and a reflector is improved by using a backfire helical antenna as a primary feeder, which is fed by using a coaxial cable. The backfire helical antenna has a matching disc coupled with an outer conductor of the coaxial cable feeder, and a coil, one end of which is coupled with an inner conductor of said coaxial cable. The other end of the coil is free standing. The coil is positioned so that the axis of the coil coincides with the axis of the reflector, and the feed end of the coil locates nearer to the reflector than the free standing end of the coil. The present antenna is useful in particular for a receiving antenna for a direct satellite broadcasting.

    摘要翻译: 通过使用回火螺旋天线作为主馈线,通过使用同轴电缆馈送用于具有初级馈线和反射器的SHF频带的抛物面天线。 回火螺旋天线具有与同轴电缆馈线的外导体耦合的匹配盘,线圈的一端与所述同轴电缆的内导体耦合。 线圈的另一端是独立的。 线圈被定位成使得线圈的轴线与反射器的轴线重合,并且线圈的进给端比线圈的自由端更靠近反射器。 本天线特别适用于直接卫星广播的接收天线。