30～150MHz宽带双定向耦合器设计  

Design of dual directional coupler in 30～150 MHz broadband

作　　者：童俊[1] 吴国安[1] 占腊民[1] 

机构地区：[1]华中科技大学光学与电子信息学院,湖北武汉430074

出　　处：《现代电子技术》2012年第23期105-108,111,共5页Modern Electronics Technique

基　　金：国家自然青年科学基金项目(61001012)资助;华中科技大学国防科研自主创新基金2011;中央高校基本科研业务费专项资金资助

摘　　要：介绍了基于三线变压器魔T的双定向耦合器工作原理,分析了串联耦合信号与并联耦合信号通过魔T进行同相和反相合成的机理,应用电报方程分析它的阻抗变换特性,得到扭绞三线传输线变压器魔T的最佳传输条件。设计了一种耦合度为30dB的宽带双定向耦合器,并对其参数进行了理论分析和测量,满足设计要求,为宽带双定向耦合器的设计和优化提供了理论基础。This paper introduces the principle of the dual directional couplers based on three wire transformer magic T, analyzes the mechanism of series coupling signal and parallel coupling signal being synthesis by magic T with same and reverse phase, analyzes its characteristics of impedance transformation by using the telegraph equation, ant obtains the best transmis- sion conditions of the twisted three line transformer magic T. A kind of broadband dual directional coupler with a 30dB cou- pling is designed, and the test results satisfies the design requirements, which provides a theoretical basis for the design and optimization of broadband dual directional coupler.

关 键 词：传输线变压器 宽频带 双定向 魔T 扭绞三线 

分 类 号：TN622-34[电子电信—电路与系统]