一种新型宽带波导魔T的设计  

Design of a new broadband waveguide magic T

作　　者：周蒙[1] 曹卫平[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2013年第6期435-438,共4页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(61071018)

摘　　要：为了设计一种应用于无线通信技术抛物面天线馈源后端宽带波导魔T,根据传统魔T的匹配结构,在魔T内腔偏置中心位置放置了一多台阶金属圆锥,达到阻抗匹配并提高该魔T带宽的目的,通过遗传粒子群优化算法优化多台阶圆锥的各项几何参数,能快速得到多台阶圆锥中大量参数的最优数值。测试结果表明,优化后魔T的4个端口反射系数在-20dB时带宽提高了20%,在C波段具有优良的表现。To design a broadband waveguide magic T used in back end of parabolic antenna feed in the wireless communication system,According to the traditional magic T match structure,a multi-stepped conducting cone is placed in offcentered of the magic T to enhance the bandwidth performance and achieve the impedance matching.The multi-stepped cone is optimized by genetic particle swarm optimization algorithm to quickly get a large number of optimal parameters of the multi-stepped conducting cone.The test results show that the reflection coefficient′s bandwidth for four ports of optimized magic T is more than 20%at-20dB,its performance is excellent in c-band.

关 键 词：宽带魔T 多台阶圆锥 遗传粒子群优化算法 

分 类 号：TN82[电子电信—信息与通信工程]