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    • 4. 发明授权
    • RF coupler for wireless telephone cradle
    • 射频耦合器,用于无线电话摇篮
    • US6134421A
    • 2000-10-17
    • US926723
    • 1997-09-10
    • Chung-Yi LeeTheodore R. Santos
    • Chung-Yi LeeTheodore R. Santos
    • H01Q1/24H04B1/38H04B1/06
    • H04B1/3833H01Q1/242H04B1/3877
    • A cradle can be mounted in a vehicle, or other suitable location, for supporting a wireless dual-frequency telephone that includes an antenna. The cradle includes a plastic housing and a ground plane disposed in the housing. A trough-shaped feed coupler element is electrically connected to matching circuits and an input/output connector. A first parasitic coupler element is aligned with the feed coupler element, and connected to the ground plane, and electromagnetically couples signals having a first frequency to and from the antenna. Together, the elements hold the antenna of the telephone. Also, a second parasitic element is disposed adjacent the feed coupler element for electromagnetically coupling signals to and from the antenna, that have a second frequency. If desired, the ground plane is established by a first conductive board and a second conductive board elevated above the first board.
    • 托架可以安装在车辆或其他合适的位置,以支持包括天线的无线双频电话。 托架包括塑料壳体和设置在壳体中的接地平面。 槽形馈电耦合器元件电连接到匹配电路和输入/输出连接器。 第一寄生耦合器元件与馈电耦合器元件对准并且连接到接地平面,并且将具有第一频率的信号与天线电磁耦合。 这些元件一起保持电话的天线。 而且,第二寄生元件设置在馈电耦合器元件附近,用于将信号与天线电磁耦合并具有第二频率。 如果需要,接地平面由第一导电板和在第一板上方升高的第二导电板建立。