正交模耦合器的优化设计与分析  

Full Wave Analysis and Optimization of the Ortho-mode Transducers

作　　者：王宏建[1] 刘和光[1] 范斌[2] 刘广[1] 

机构地区：[1]中国科学院微波遥感部,北京100190 [2]北京空间机电研究所,北京100190

出　　处：《兵工学报》2009年第5期613-616,共4页Acta Armamentarii

基　　金：科技部863计划资助项目(2006AA12Z137)

摘　　要：文章提出了主波导双模片侧臂波导单模片正交模耦合器(OMT),并采用电磁场时域有限差分(FDTD)算法与遗传算法(GA)来优化设计,给出了设计实例及其具体尺寸和电性能数值结果,正交模耦合器和喇叭的交叉极化电平达到-25 dB以下,带内驻波在1.1以下;采用双隔膜结构,主波导尺寸减小1/3.A new ortho-mode transducer（OMT）composed of double-septums in main wave guide and single-septum in side waveguide was proposed. Finite difference method in time domain（FDTD） and genetic algorithms（GA） were combined to analyse and optimize this new OMT. Numerical results of size and electric performance were simulated for an example. The simulated results show that cross polarization level of OMT with feed horn is less than -25 dB. Voltage standing-wave ratio （VSWR） is less than 1.1, main waveguide size decreases by 1/3 at using double-septums.

关 键 词：电磁场与微波技术 正交模耦合器 时域有限差分法 遗传算法 

分 类 号：TN622[电子电信—电路与系统]