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    • 3. 发明授权
    • Dual-band antenna coupler for a portable radiotelephone
    • 用于便携式无线电话的双频天线耦合器
    • US5852421A
    • 1998-12-22
    • US760024
    • 1996-12-04
    • David Maldonado
    • David Maldonado
    • H04M1/725H01Q1/24H01Q1/32H03H7/46H04B1/18H04B1/38H04B1/40H01Q1/52
    • H01Q1/246H01Q1/242H01Q1/32H04B1/3877H03H2007/386H04B1/18H04B1/3833H04B1/406
    • A dual-band antenna coupler for use in an adapter for portable radiotelephone. A plurality of curved bands of metal are positioned on a ground plane, with at least two of the plurality of curved bands of metal being electrically isolated from the ground plane so as to couple radio frequency (RF) signals to and from the antenna of the portable radiotelephone. The isolated curved bands of metal couple RF signals between the antenna of the portable radiotelephone and first and second matching circuits designed to match the portable radiotelephone antenna at each of the respective frequency bands. A selector switch coupled to the output of the matching circuits selects the appropriate matching circuit output for connection to an external antenna. The adapter also includes at least one ground pin mounted on the ground plane. When the portable radiotelephone is interfaced with the antenna coupler, the ground pin makes electrical contact with a ground reference connection on the portable radiotelephone.
    • 用于便携式无线电话适配器的双频天线耦合器。 金属多个弯曲带位于接地平面上,多个金属弯曲带中的至少两个与接地平面电隔离,以将射频(RF)信号耦合到天线的天线 便携式无线电话。 在便携式无线电话机的天线之间的金属耦合RF信号的隔离的弯曲带,以及被设计成在各个频带中的每一个处匹配便携式无线电话天线的第一和第二匹配电路。 耦合到匹配电路的输出的选择器开关选择用于连接到外部天线的适当的匹配电路输出。 适配器还包括安装在接地平面上的至少一个接地引脚。 当便携式无线电话机与天线耦合器接口时,接地引脚与便携式无线电话机上的接地参考连接电接触。