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    • 4. 发明授权
    • Output match directional coupler
    • 输出匹配定向耦合器
    • US09276552B2
    • 2016-03-01
    • US14497471
    • 2014-09-26
    • RF Micro Devices, Inc.
    • David E. Jones
    • H01P5/18H03H7/40H03F1/56H03F3/189H03F3/195H03H7/09
    • H03H7/40H03F1/565H03F3/189H03F3/195H03F2200/387H03F2200/423H03F2200/451H03F2200/541
    • A directional coupler that provides directional coupling and an impedance transformation is disclosed. In one embodiment, the directional coupler includes a low pass filter having a filter inductor that is coupled between an input port and an output port and a filter capacitor coupled between the output port and ground. The directional coupler also includes detector circuitry wherein the filter inductor is magnetically coupled to a detector inductor in the detector circuitry such that current passing through the filter inductor generates a detector current through the detector inductor. Furthermore, the low pass filter and the detector circuitry cooperate to transform a first impedance presented at the output port to a second impedance presented at the input port. Accordingly, the filter inductor is used in the low pass filter to provide an impedance transformation so as to operate with the detector circuitry to provide a detector current for directional coupling.
    • 公开了一种提供定向耦合和阻抗变换的定向耦合器。 在一个实施例中,定向耦合器包括低通滤波器,其具有耦合在输入端口和输出端口之间的滤波电感器以及耦合在输出端口和地之间的滤波电容器。 定向耦合器还包括检测器电路,其中滤波电感器磁耦合到检测器电路中的检测器电感器,使得通过滤波电感器的电流产生通过检测器电感器的检测器电流。 此外,低通滤波器和检测器电路协作以将在输出端口处呈现的第一阻抗变换为在输入端口处呈现的第二阻抗。 因此,滤波电感器用于低通滤波器以提供阻抗变换,以便与检测器电路一起工作以提供用于定向耦合的检测器电流。