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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。
Composite left and right hand transmission line proposed in the field of wireless communications will have great application prospects, but also for the microwave transmission line and microwave components designed to provide a new idea. A 90 ° phase shifter is designed according to the phase characteristics of composite left and right hand transmission lines and the bandwidth broadening principle. The phase shifter theoretically can realize the 90 ° phase shift of L band from f1 to f2. The relative bandwidth is 31% and the absolute error in the working band is within ± 3 °. The simulation results show that the 90 ° phase shifter based on compound left and right hand transmission line can realize the phase shift in wideband, and the effect is obvious. The actual circuit is more in line with the simulation circuit, to achieve the desired requirements.