微波网络[S]参数应用实例

Example of Microwave Network [S] Matrix Analysis

散射矩阵即[S]参数是描述微波网络特性的一种重要的矩阵形式,也是微波网络的特色之一。对散射矩阵概念的理解与应用是本科微波技术课程微波网络部分的一个重点和难点。本文以微波基本元件——3dB分支线定向耦合器为例,从它的[S]参数出发探究其工作性质,并给出了具体的工程应用实例,借此加深学生对[S]参数的理解,掌握用[S]参数分析问题的方法和能力,同时也可使学生了解3dB分支线定向耦合器的各种实用价值。

Scattering matrix （ [ S ] parameter ） is one of the important matrix types in the characteristic of microwave networks description. The understanding and application of the microwave network scattering matrix theory are important and difficult in teaching process. Based on the basic passive microwave compo- nent-3dB branch-line hybrid, startting from it＇s scattering matrix, the paper studies the working performance and practical applications. The process can enhance the understanding of the scattering matrix and make the undergraduates master the analysis method. The plentiful practical applications of the 3dB branch-line hybrid can also be included in the process.