Ka波段宽带谐波抑制定向耦合器  

Ka-band wideband harmonic-suppression directional coupler

作　　者：鲍鑫 张德伟 邓海林 吕大龙 张毅 Bao Xin;Zhang Dewei;Deng Hailin;Lü Dalong;Zhang Yi(Institute of Information System Engineering,PLA Information Engineering University, Zhengzhou 450001, China)

机构地区：[1]中国人民解放军战略支援部队信息工程大学信息系统工程学院,郑州450001

出　　处：《强激光与粒子束》2018年第6期60-64,共5页High Power Laser and Particle Beams

基　　金：国家重大专项项目

摘　　要：为解决传统分支线定向耦合器带宽较窄,且应用到线性化器等微波元件中时受谐波信号影响较大的问题,提出了一个宽带且带有谐波抑制功能的定向耦合器。该定向耦合器在双支节定向耦合器的基础上增加一个支节,可有效地提高定向耦合器的带宽,同时将其传输线支节替换为低通滤波结构,以实现对高次谐波抑制的作用。仿真结果表明,该定向耦合器的反射系数和隔离度均小于-15dB,传输损耗小于3.8dB,波动范围0.5dB,相位差为90°且与双支节耦合器相比增加1GHz带宽。满足耦合器的设计指标,可应用到微波元件中,提高微波元件的性能。In order to solve the problem that the traditional directional coupler has a narrow bandwidth and is greatly influenced by harmonic signals,this paper presents a broadband directional coupler with the function of harmonic suppression.The directional coupler adds a branch section to double-branch-line directional coupler,thus can effectively improve the bandwidth.While its transmission lines are added with low-pass filter structures,it can filter harmonics well.The experimental results show that the directional coupler reflection coefficient and isolation are less than-15 dB,the transmission loss is more than-3.8 dB,the fluctuation range is 0.5 dB and the phase difference is 90°.It satisfies the design requirement of coupler,and can be applied to microwave components to improve the performance.

关 键 词：谐波抑制 宽带 低通滤波器 分支节 高低阻抗线 

分 类 号：TN715[电子电信—电路与系统]