混频器矢量表征测试方法研究

介绍了一种测量射频混频器的新方法。该方法利用反射测量，能给出准确的输入匹配、输出匹配以及变频损耗的幅度、相位和群时延响应，并适用于互易且镜频响应可以被滤除的混频器。首先，对该测量方法进行了分析，建立了单端口矢量误差模型。然后，对该模型的S参数矩阵进行了推导，给出了混频器特性参数计算公式。最后，用实验验证了该方法的正确性。

Research on Vector Characterization Measurement Method of Mixers

A new technique based on reflection measurement for RF mixers measurement is presented.The technique provides accurate and repeatable measurements of mixers that reciprocal and image frequency can be filtered for input match,output match,conversion amplitude,conversion phase,and group delay.Firstly,by analyzing the measurement method,an one-port vector error model is established.Then,S-parameter matrix of the model is derived and the formulas of the mixer performance parameters are given.Finally,experimental results verify the correctness of the method.