Dual-element microstrip patch antenna for mitigating radio frequency interference
    1.
    发明授权
    Dual-element microstrip patch antenna for mitigating radio frequency interference 失效
    双元件微带贴片天线,用于减轻射频干扰

    公开(公告)号:US06930639B2

    公开(公告)日:2005-08-16

    申请号:US10390331

    申请日:2003-03-14

    摘要: Method and apparatus for reducing radio frequency interference (RFI) using a dual-element patch antenna [10]. The antenna possesses two antenna elements [13, 14] having distinct radiation patterns. Either element may be independently selected using a DC bias voltage. Diodes [20] connected to the elements serve to disable one element when the other is selected. In one selected mode, a nominal radiation pattern provides a broad, hemispherical shaped sensitivity that is designed for acquiring and tracking all navigation satellites above the horizon. This nominal radiation pattern, however, is susceptible to interference that is present near or below the horizon. The second selectable radiation pattern of the dual-element antenna has comparatively higher gain toward zenith, and lower gain at and below the horizon to mitigate interference. This combination of features is packaged in a single antenna unit that can be a direct replacement for existing antennas. The dual-element antenna unit has a low vertical profile and is suitable for mounting on high-speed moving vehicles.

    摘要翻译: 使用双元件贴片天线降低射频干扰(RFI)的方法和装置[10]。 天线具有两个具有不同辐射图案的天线元件[13,14]。 可以使用DC偏置电压独立地选择任一元件。 连接到元件的二极管[20]用于在选择另一个元件时禁用一个元件。 在一种选择的模式中,标称辐射图形提供广泛的半球形灵敏度,其设计用于获取和跟踪地平线以上的所有导航卫星。 然而,这种标称辐射模式易于存在于地平线附近或之下的干扰。 双元件天线的第二种可选择的辐射图形具有相对较高的天顶增益,并且在水平线上和下方的增益较低以减轻干涉。 这种特征的组合被封装在单个天线单元中,其可以是现有天线的直接替代。 双元件天线单元具有低垂直轮廓,适合安装在高速移动车辆上。