涡旋电磁波轨道角动量模态抗干扰性能分析  

Orbital Angular Momentum Anti-interference Properties Analysis of Electromagnetic Vortex Wave

作　　者：林屹峰 单明明 孔旭东 冯强[1,2] 李龙 LIN Yifeng;SHAN Mingming;KONG Xudong;FENG Qiang;LI Long(Key Laboratory of High Speed Circuit Design and EMC of Ministry of Education,Xidian University,Xi’an 710071,China;Intelligent Metamaterial Center,Pazhou Lab,Guangzhou 510330,China)

机构地区：[1]西安电子科技大学超高速电路设计与电磁兼容教育部重点实验室,西安710071 [2]人工智能与数字经济广东省实验室智能超材料中心,广州510330

出　　处：《雷达学报（中英文）》2021年第5期773-784,共12页Journal of Radars

基　　金：国家重点研发计划(2018YFA**263)。

摘　　要：鉴于涡旋电磁波所体现出的独特空间电磁场分布特征,以及其携带的轨道角动量(OAM)在理论上所具有的无穷维度模态正交特性,涡旋电磁波在无线通信领域和雷达探测与成像领域均表现出重要的研究价值和应用潜力。该文主要从涡旋电磁波空间电磁场分布的角度以及OAM模态正交性保持的角度,重点对涡旋电磁波射频收发链路中OAM模态的抗干扰性能进行分析。在C波段分别设计了不同的平面阵列天线用来产生和接收携带有OAM模态为l=+1和l=-2的涡旋电磁波束,并建立起涡旋电磁波的射频收发链路。通过引入一个喇叭天线作为干扰源,以相应涡旋电磁波束的OAM模态谱分布以及OAM模态正交性作为主要的分析依据,在不同干扰场景下抗干扰性对涡旋电磁波的收发射频链路的OAM模态性能进行仿真和分析。该文对设计的天线模型进行加工和测试,对涡旋电磁波射频收发链路中OAM模态抗干扰性能的分析,可以为涡旋电磁波在无线通信及雷达探测与成像等有关研究领域提供一些前瞻性的探索和设计上的指导。The electromagnetic vortex wave has demonstrated excellent research value with potential applications in the fields of wireless communication and radar detection and imaging due to its unusual electromagnetic field distribution and theoretically infinite orthogonal Orbital Angular Momentum(OAM)modes.This study analyzes the anti-interference performance of OAM modes in the electromagnetic vortex Radio Frequency(RF)transceiver link primarily from the perspective of the electromagnetic vortex field distributions in space and the OAM modes orthogonality.Planar antenna arrays are designed to generate the electromagnetic vortex beams with respective OAM modes of and in the C band,and the corresponding RF transceiver links are established.The OAM modes’anti-interference properties under different interference situations are analyzed in the electromagnetic vortex RF transceiver link by using a horn antenna as the interference source.Meanwhile,the corresponding OAM mode spectrum and the OAM modes’orthogonality are employed as the primary methods in our analysis.Finally,the designed antenna models are fabricated,and the electromagnetic vortex RF transceiver links are measured.The corresponding analyses and conclusions are presented in this study.The OAM modes’anti-interference performance analysis in the vortex electromagnetic wave’s RF transceiver link can provide a reference for exploring and designing a vortex electromagnetic wave in wireless communication and radar detection and imaging research.

关 键 词：涡旋电磁波 轨道角动量(OAM) 阵列天线 OAM模态抗干扰 OAM射频收发链路 OAM模态谱 

分 类 号：TN95[电子电信—信号与信息处理]