高功率微波宽带波导定向耦合器设计  

Design of high power broadband waveguide coupler

作　　者：张翠翠[1] 王益[1] 王建忠[1] ZHANG Cuicui;WANG Yi;WANG Jianzhong(Metrology and Testing Center,China Academy of Engineering Physics,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院计量测试中心

出　　处：《太赫兹科学与电子信息学报》2019年第6期1036-1040,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：为满足高功率微波测量需求,设计一种X波段宽带的波导定向耦合器。为达到宽带设计要求,该耦合器采用多孔耦合结构,利用切比雪夫分布函数得到每组耦合系数,同时修正耦合臂引入的截止衰减影响,根据耦合理论得到每组小孔的初始尺寸,最后基于软件优化后得到满足预期设计要求的宽带耦合器。根据仿真结果,该耦合器在8.2~12.4GHz频带范围内的耦合度为40 dB,带内波动小于1 dB,方向性优于30 dB,连续波功率容量达到0.84 MW;实测耦合度为38~39 dB,端口反射小于-20 dB,可满足MW级高功率微波脉冲测量系统的应用需求。To meet the demand of high power microwave measurement,a broadband waveguide directional coupler of X-band is presented.In order to achieve the requirements of broadband,a multi-hole coupling structure is adopted,which uses the Chebyshev function to get each coupling coefficient,and gets the initial diameter of each hole by hole-coupling theory.A broadband coupler meeting the design requirements is obtained through optimization with simulation software.According to the simulation results,the coupling coefficient of the system is 40 dB within 8.2–12.4 GHz,the in-band fluctuation is less than 1 dB,and the isolation is more than 30 dB,the measured coupling coefficient is 38–39 dB,the reflection is less than-20 dB,the power capacity is 0.84 MW,which is suitable for MW level high power microwave pulse measurement.

关 键 词：定向耦合器 宽带耦合器 多孔耦合 高功率微波 

分 类 号：TN622.2[电子电信—电路与系统]