一种毫米波大相移量移相器设计方法

为了解决传统开关线型移相器存在相移越大,频带内相移偏差量也越大的问题,采用谢夫曼开关线型移相器对传统开关线型移相器进行改良。介绍了谢夫曼开关线型移相器在Ka频段实现90°和180°大相移量的原理和关键技术,使用ADS仿真软件进行建模仿真。仿真结果满足在频带内驻波比小于1.3,移相精度在3°以内,验证了该方案的可行性。     

Differential phase shifters based on Schiffman type‐C and type‐F networks with wide phase shift range

This study proposes a class of differential phase shifters based on the Schiffman type‐C and type‐F networks with wide phase shift range. After the phase and bandwidth properties of these two distinct networks are numerically analyzed, two unique advantages of wide phase shift range and wide phase shift bandwidth are revealed. Next, the optimal design parameters for different phase shift values up to 405° are presented to allow for a quick design process. To verify the proposed approach, a 180° differential phase shifter is designed, fabricated and measured. Good performance is achieved with an impedance ratio of 1.959 and 3.7° phase deviation over a phase shift bandwidth of 61%.