8GHz～18GHz波纹方波导移相器的研究

Analysis and Design of 8GHz～18GHz Square Waveguide Phase Shifter with Rectangular Iris

波纹方波导圆极化器是常用的圆极化器,波纹方波导移相器是它的关键组成部分。文中以路的方法对波纹方波导移相器进行了分析,计算了周期长度内相移量的宽频带特性和波纹方波导各个尺寸对驻波比的影响。应用电磁仿真软件对8 GHz^18 GHz波纹方波导移相器进行了优化,最后在整个频带内得到的相移量为90°±12,°驻波比小于1.1。加工后与其他零件装配成圆极化器,经过测试,在整个频带内轴比小于3 dB。

Square waveguide iris polarizer has found widespread application in circularly polarized antennas.Square waveguide iris phase shifter,as the very important part of it,is analyzed on a lumped loading concept.This paper discussed the phase shift and VSWR influenced by phase shifter dimensions within 8 GHz^18 GHz frequency bands.Through optimization by using electromagnetic simulation software,the phase shift is within 90°±12° and the VSWR is less than 1.1 in the 8 GHz^18 GHz octave bandwidth.Measured,the maximum axial ratio is less than 3 dB.