多波束涡旋电磁波反射阵天线设计  

Design of Multibeam Vortex Electromagnetic Wave Reflectarray

作　　者：邱靓婕 李秀萍[1,2] 郭晓斌 齐紫航 朱华 QIU Liangjie;LI Xiuping;GUO Xiaobin;QI Zihang;ZHU Hua(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China;Key Laboratory of Universal Wireless Communications Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《无线电工程》2022年第2期274-278,共5页Radio Engineering

基　　金：国家自然科学基金(61971051)。

摘　　要：针对传统反射阵天线产生涡旋电磁波存在方向单一、轨道角动量(Orbital Angular Momentum,OAM)模态单一的问题,设计了一款多波束涡旋电磁波反射阵天线。提出了一款基于旋转单元法的新型宽带圆极化单元,并利用口径场叠加法,获得了单个馈源产生多个涡旋波束的反射阵阵面补偿相位。仿真结果表明,该天线在26.5~32 GHz生成了2个携带模态-1和+1的涡旋波束,OAM带宽和3 dB增益带宽均为18.3%。在工作带宽内,最大增益为18.3 dBic,口径利用效率为10.31%。Conventional reflectarrays only produce vortex electromagnetic wave with single direction and single-mode Orbital Angular Momentum(OAM).To address this issue,a multibeam vortex electromagnetic wave reflectarray is designed.A novel wideband circularly polarized element based on rotating element method is proposed,and the compensation phase of reflectarray antenna with multiple vortex beams generated by a single feed is obtained by using aperture field superposition.The simulation results show that the antenna successfully generates two vortex beams with modes of-1 and+1 in the range of 26.5~32 GHz.The OAM bandwidth and 3 dB gain bandwidth are both 18.3%.Within the operating bandwidth,the maximum gain is 18.3 dBic and the aperture utilization efficiency is 10.31%.

关 键 词：轨道角动量 涡旋电磁波 反射阵天线 宽带 多波束 

分 类 号：TN82[电子电信—信息与通信工程]