基于圆形阵列的OAM波束产生系统设计与实现  

Design and Implementation of an OAM Beam Generation System Based on Circular Array

作　　者：许强 谢跃雷[1,2] XU Qiang;XIE Yuelei(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;National and Local Joint Engineering Research Centre for Satellite Navigation,Positioning and Location Services,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]卫星导航定位与位置服务国家地方联合工程研究中心,广西桂林541004

出　　处：《电讯技术》2022年第10期1399-1406,共8页Telecommunication Engineering

基　　金：广西科技重大专项(桂科AA21077008);桂林电子科技大学研究生教育创新计划项目(2020YCXS021)。

摘　　要：针对目前轨道角动量(Orbital Angular Momentum,OAM)波束发生器模态单一、设计复杂等问题,设计并实现了一种在X频段内产生可调OAM波束的均匀圆形阵列天线。天线为半径60 mm的圆盘,由8个阵元组成,阵元采用微带天线设计,同轴馈电,在中心频率处回波损耗达-51.5 dB,S_(11)<-10 dB的工作带宽为9.6~10.5 GHz。仿真和实测结果表明,天线可通过调节相位产生7种不同模态的涡旋电磁波,产生OAM为+1的涡旋电磁波纯度可达90%。通过误差分析发现,低模态数的涡旋电磁波对幅度和相位误差具有很好的抗干扰能力,这为利用涡旋电磁波实现目标探测和提高信道容量奠定了基础。To solve the problems of single mode and complex design of orbital angular momentum(OAM)beam generator,a uniform circular array(UCA)antenna is designed and implemented to generate adjustable OAM beam in X band.The disk with the antenna size of 60 mm radius is composed of 8 array elements,which are designed by microstrip antenna and fed coaxial.The return loss at the central frequency is-51.5 dB,and the working bandwidth of S _(11)<-10 dB is 9.6~10.5 GHz.The simulation and measurement results show that the antenna can generate seven different modes of vortical electromagnetic waves by adjusting the phase,and the purity of vortical electromagnetic wave with OAM=+1 can reach 90%.Through error analysis,it is found that the vortical electromagnetic wave with low mode number has good anti-interference ability to amplitude and phase errors,which lays a foundation for using vortical electromagnetic wave to realize target detection and improve channel capacity.

关 键 词：涡旋电磁波 OAM波束产生系统 均匀圆形阵列 目标探测 

分 类 号：TN822[电子电信—信息与通信工程]