A STRIP-LINE DIRECTIONAL COUPLER UTILIZING A NONHOMOGENEOUS DIELECTRIC MEDIUM

被引：33

作者：

DALLEY, JE

机构：

[1] Bell Telephone Laboratories, Reading

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 1969年 / MT17卷 / 09期

关键词：

D O I：

10.1109/TMTT.1969.1127039

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A 3 dB directional coupler which utilizes nonhomogeneous dielectric media to produce different phase velocities for the even and odd modes of propagation is described. The two output ports are conductively connected to each other as are the input and null ports with de isolation between the input and both output ports. Well known thin-film techniques can be used to realize the coupler. General coupler equations and design parameters are given along with computer solutions and experimental verification. A minimum return loss of 22 dB was experimentally achieved over a 20 percent bandwidth and 27 dB minimum return loss with equal isolation over the same bandwidth is predicted with the application of simple compensation techniques. It is shown that the coupler may be used to effect an impedance trans-formation between the input and output ports; however, the isolation is degraded. © 1969, IEEE. All rights reserved.

引用

页码：706 / &