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Measurement Method of Amplitude Ratios and Phase Differences Based on Power Detection Among Multiple Ports

机译:基于端口间功率检测的幅度比和相位差测量方法

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摘要

A method of measuring the amplitude ratios and phase differences among the same RF output signals from multiple ports at the same frequency is proposed. A power-combining module is used to couple multiple signals vectorially from the ports. In the proposed method, the amplitude ratios among the RF signals from multiple ports are calculated using the output power of the module to which only one port is connected, and using the S-parameters of the module itself. However, the phase differences among multiple ports cannot be simply represented by the differences between the output power of the module and the ideally combined power, because the impedances of all ports except measuring ports should be perfectly matched. The proposed method uses a parameter that compensates for the impedance mismatches generated at the other ports to achieve precise measurement of the phase differences among multiple ports. The measurement results using the passive component with three ports reveal that the mean errors of the proposed method are 1.26 and 2.15 in the amplitude and phase, respectively, when compared with measurements using the vector network analyzer. The standard deviations of the errors show 1.68 and 1.67 in the amplitude and phase, respectively.
机译:提出了一种测量来自多个端口的相同频率的相同RF输出信号之间的振幅比和相位差的方法。功率合并模块用于从端口矢量地耦合多个信号。在所提出的方法中,使用仅连接一个端口的模块的输出功率以及模块本身的S参数来计算来自多个端口的RF信号之间的振幅比。但是,多个端口之间的相位差不能简单地用模块的输出功率和理想组合功率之间的差来表示,因为除测量端口外的所有端口的阻抗都应完全匹配。所提出的方法使用补偿在其他端口处产生的阻抗失配的参数来实现多个端口之间的相位差的精确测量。使用带有三个端口的无源组件的测量结果表明,与使用矢量网络分析仪进行的测量相比,该方法在幅度和相位上的平均误差分别为1.26和2.15。误差的标准偏差在幅度和相位上分别显示为1.68和1.67。

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