同步分支线定向耦合器的分解设计方法

定向耦合器是四端口网络,直接设计十分困难。本文采用同步分支线定向耦合器的分解设计方法。文中首先分析了定向耦合器的传输特性,并依据奇、偶模激励原则将其分解为两个二端口网络,即两个带通滤波器。这样,同步分支线定向耦合器的设计即转化为带通滤波器的设计。

A Resolvent Design Procedure of Synchronous Branch Directional Couplers

Directional Couplers are four-port networks and fairly difficult to de- sign.This paper relates generally to a special design procedure of synchronous branch direc- tional couplers. First of all,the transmission characteristics of the directional couplers are analysed. And based on the principle of odd and even model excitation,the branch directional couplers are resolved into two band-pass filters. Then,the design procedure of synchronous branch directional couplers are turned into synthesis of networks for microwave band-pass filters. At last,a design example of the synchronous branch wave guide directional coupler is given.The measured data are also reported.