本文就ＭＭＤＳ多路微波分配系统基带合成器的一种方案进行了详细论述。给出了所研制的基带合成器具体电路，整个电路采用了二片集成电路块、外圆元件少，调试方便。作者采用共基电路作三路音频副载波混合电路，并对其提出了〔Ｙ〕参数分析法，导出了计算公式，对具体参数给出了计算结果，并进行了分析、讨论 In this paper, a scheme of MMDS multiplexer baseband synthesizer is discussed in detail. The specific circuit of the baseband synthesizer is given. The whole circuit uses two integrated circuit blocks, the external components are few, and the debugging is convenient. The author uses a common-base circuit as a three-way audio subcarrier hybrid circuit, and puts forward the [Y] parameter analysis method, derives the calculation formula, and gives the calculation results for specific parameters, and analyzes and discusses