在文献[1]中已对信号流图及其在电子电路中的应用作了阐述,本文拟介绍它在微波网络中的应用.为此,先对用来描述微波结构外特性的网络参数作一简要说明;给出一些常用的微波结构及其相应的信号流图;举几个应用的例子.利用信号流图来研究微波网络,不仅物理概念清晰,且可简化很多繁杂的计算. In the literature [1], the signal flow diagram and its application in electronic circuits have been described, this article describes its application in microwave networks.To this end, the first to describe the characteristics of the microwave structure of the network parameters A brief description is given, and some commonly used microwave structures and their corresponding signal flow diagrams are given, and several application examples are given.Using signal flow diagrams to study microwave networks not only provides a clear physical concept but also simplifies many complicated calculations.