| 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。 |
| 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 |
| DOI： |
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| 基金项目: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） |
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| Design and implementation of an OAM beam generation system based on circular array |
| XU Qiang,XIE Yuelei |
| (School of Information and Communication,Guilin University of Electronic Technology，Guilin 541004，China;1.School of Information and Communication,Guilin University of Electronic Technology，Guilin 541004，China;
2.National and Local Joint Engineering Research Centre for Satellite Navigation,Positioning and Location Services,Guilin 541004,China) |
| Abstract: |
| 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. |
| Key words: vortical electromagnetic wave OAM beam generation system uniform circular array target detection |
《电讯技术》编辑部 