基于复合左右手传输线90°移相器的设计

Design of 90° Phase Shifter based on Compound Left-right Transmissien Line

复合左右手传输线的提出在无线通讯领域将有很大的应用前景,也为微波传输线和微波元件的设计提供了一种新思路。根据复合左右手传输线的相位特性及频带展宽原理设计了一个90°移相器,该移相器理论上可以实现L波段从f1到f2的90°移相。相对带宽为31%,工作频带内的绝对误差在±3°以内。仿真结果表明,基于复合左右手传输线的90°移相器能够实现宽带内的移相,且效果比较明显。实际电路也比较吻合仿真电路,达到理想的要求。

The compound left-right transmission line has a great application prospect in the domaine of radio communication, provides also a new thingking for microwave transmissien line and microwave components. The authors designed a 90° phase shifter according to the phase characteristics and band spread principle of left-righ transmission line. The phase shifter can realize 90° phase shift from f1 to f2 in L ban in theory,its relative bandwidth is 31% . absolute erros in operating frequency band is within ±3°. The simulated results indicate that the phase shifter can realize the phase shift within wideband,and the effect is obvious.