基于脊间隙波导的低副瓣多波束阵列天线设计  

Design of low sidelobe multibeam array antenna based on ridge gap waveguide

作　　者：权钰 李想 王昊[1] 陶诗飞 曹建银 丁振东 Quan Yu;Li Xiang;Wang Hao;Tao Shifei;Cao Jianyin;Ding Zhendong(School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Laboratory of Electromagnetic Space Cognition and Intelligent Control,Beijing 100191,China)

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]电磁空间认知与智能控制技术实验室,北京100191

出　　处：《南京理工大学学报》2024年第1期88-95,共8页Journal of Nanjing University of Science and Technology

基　　金：国家重点研发计划(2021YFB3502500)。

摘　　要：为了克服毫米波频段传统多波束阵列天线损耗高、效率低以及等幅激励情况下副瓣电平较高的问题,该文提出了一种基于间隙波导技术的低副瓣多波束阵列天线设计方法。首先,设计了基于巴特勒矩阵的双层多波束馈电网络拓扑结构,将传统巴特勒矩阵的4个输出端口与不等功分器相连,拓展为8个输出端口,实现输出功率的重新分配,以达到低副瓣设计的目的。接着,设计了基于脊间隙波导的双层和单层定向耦合器、交叉结和不等功分器,完成了低副瓣多波束阵列天线的整体设计。最后,进行了天线实物加工和测试,测试与仿真结果较为吻合,副瓣电平得到了有效降低,验证了所提出的低副瓣多波束阵列天线的性能。In order to overcome the problems of high loss,low efficiency and high sidelobe level of millimeter-wave multibeam array antenna,a design method of low sidelobe multibeam array antenna based on gap waveguide technology is proposed in this paper.Firstly,a double-layer multibeam feed network topology based on Butler matrix is designed.The four output ports of the traditional Butler matrix are connected to the unequal power dividers,which are expanded to eight output ports to realize the redistribution of output power,thereby achieving the purpose of low sidelobe design.Then,the double-layer and single-layer directional couplers,crossovers and unequal power dividers based on ridge gap waveguide are designed and the whole low-sidelobe multibeam array antenna is realized.Finally,the antenna is manufactured and measured.The measured results are in good agreement with the simulation results,and the sidelobe level is effectively reduced,which verifies the performance of the proposed low sidelobe multibeam array antenna.

关 键 词：毫米波 多波束 低副瓣 脊间隙波导 阵列天线 

分 类 号：TN822[电子电信—信息与通信工程]