基于间隙波导的毫米波宽带定向耦合器  

Millimeter-Wave Broadband Directional Coupler Based on Gap Waveguide

作　　者：沈瑞亮 冯文杰[1,2] 倪啸宇[1,2] 王慧 施永荣[3] SHEN Rui-liang;FENG Wen-jie;NI Xiao-yu;WANG Hui;SHI Yong-rong(Guangdong Provincial Key Laboratory of Millimeter-Wave and Terahertz,South China University of Technology,Guangzhou,Guangdong 510006,China;Department of Communication Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094 China;Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211106,China)

机构地区：[1]华南理工大学广东省毫米波与太赫兹重点实验室,广东广州510640 [2]南京理工大学通信工程系,江苏南京210094 [3]南京航空航天大学电子信息工程学院,江苏南京211106

出　　处：《电子学报》2023年第8期2118-2123,共6页Acta Electronica Sinica

基　　金：广东省重点领域研发计划(No.2018B010115001);国家自然科学基金(No.61931009,No.61971387);广东省珠江人才创新创业团队项目(No.2017ZT07X032);2019创新研究基金(No.GSZJB-DQD-2019)。

摘　　要：本文基于新型间隙波导传输线技术,设计了一种宽带的0 dB前向波定向耦合器,提出的耦合器中心频率在30 GHz,可以实现宽带平坦的0 dB耦合特性,通过在两个相邻的槽间隙波导的公共壁上开耦合缝隙来实现主通道到副通道的能量耦合.为了方便实验测试,还设计了宽带的槽间隙波导到标准WR-28波导的过渡转换结构.最后进行了实物加工与测量,根据测量结果,本文提出的定向耦合器工作频带为27.1~31.5 GHz,带内最大插入损耗约为0.5 dB,且回波损耗小于-10 dB,耦合器的相对带宽为14.7%(中心频率30 GHz).测量结果与仿真结果吻合较好,实验验证了该设计方法的正确性.In this paper,a broadband 0 dB forward wave directional coupler is designed based on the new gap wave⁃guide transmission line technology.The center frequency of the proposed coupler is 30 GHz,which can realize broadband flat 0 dB coupling level.The energy coupling from the main channel to the auxiliary channel is realized by multi coupling slots on the common wall of two adjacent groove gap waveguides.For the convenience of experimental measurement and verification,the transition from groove gap waveguide to standard WR-28 waveguide is designed.Finally,the designed cou⁃pler is manufactured and measured.According to the measurement results,the proposed directional coupler working fre⁃quency band is 27.1~31.5 GHz and maximum insertion loss is about 0.5 dB,the return loss is less than-10 dB,and relative bandwidth is about 14.7%(center frequency is 30 GHz).The simulated result and measurement result agree well with each other,and the correctness of the design method is verified by experiments.

关 键 词：间隙波导 定向耦合器 电磁带隙 低损耗 宽带 

分 类 号：TN928[电子电信—通信与信息系统]