一种20 dB宽带非对称耦合器的设计与仿真  

Design and Simulation of a 20 dB Asymmetric Wideband Coupler

作　　者：罗兵[1] 张永亮[1] LUO Bing;ZHANG Yong-Liang(School of Electronics and Communications,Guangdong Mechanical & Electrical College,Guangzhou Guangdong 510515,China)

机构地区：[1]广东机电职业技术学院电子与通信学院

出　　处：《通信技术》2019年第6期1525-1529,共5页Communications Technology

基　　金：广东省自然科学基金项目(No.2018A0303130326)~~

摘　　要：分析了宽带耦合器的设计原理,并在理论计算与分析的基础上,使用射频/微波仿真软件ADS设计了一种20dB宽带非对称耦合器,利用了带状线阻抗较易控制的优点,克服带状线不方便进行调谐的缺点,设计了一种非对称宽带耦合器,耦合器的带宽较宽(覆盖2~4GHz等频段),具有优良的回波损耗(>25.5dB),较稳定的耦合度(19.45~20.59dB),较高的隔离度(>55.9dB),直通端具有较小的插入损耗和带内波动(0.05~0.15dB),功率容限高,体积小,用于通信系统,可以降低设计成本,提高通信系统的可靠性。The design principle of the broadband coupler is analyzed.Based on theoretical calculation and analysis,a 20dB wideband asymmetric coupler is designed using RF/microwave simulation software ADS.By using the advantage that the strip-line impedance is easier to control and overcome the shortcomings of the strip-line being inconvenient to tune,an asymmetric wideband coupler is designed.The coupler has a wide bandwidth(covering bands from 2 to 4 GHz)with excellent return loss(>25.5 dB),stable coupling(19.45 to 20.59 dB),and high isolation(>55.9 dB).The through-end has small insertion loss and in-band fluctuation(0.05-0.15 dB),high power tolerance and small volume.It can reduce the design cost and improve the reliability of the communication system for the communication system.

关 键 词：非对称 带状线 宽带耦合器 回波损耗 耦合度 设计与仿真 

分 类 号：TN713[电子电信—电路与系统]