基于涡旋电磁波的大容量通信系统设计  

Design of Large Capacity Communication System Based on Vortex Electromagnetic Waves

作　　者：田震[1] 张德智[1] 李金龙[1] 冯强[2] TIAN Zhen;ZHANG Dezhi;LI Jinlong;FENG Qiang(China Academy of Launch Vehicle Technology,Beijing 100076,China;Xidian University,Xi'an 710100,China)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]西安电子科技大学,西安710100

出　　处：《计算机测量与控制》2023年第7期156-162,221,共8页Computer Measurement &Control

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;通过涡旋电磁波空间电磁场的分布和原理入手,采用在C波段设计阵元交替排布的双圆环均分天线阵列,并基于带状线屏蔽性能强的优势设计4路1分8的叠层馈电网络,从而产生4种混合模态(+1,-1,+2,-2)的涡旋天馈系统;通过搭建混合模态涡旋电磁波大容量通信系统测试收发天馈之间模态隔离度大于15 dB,在此基础上加入软件无线电平台验证通信系统多路涡旋波信号传输特性,测试验证4个端口均可正确接收、解调电磁信号,实现频谱效率4倍的提升。Vortex electromagnetic waves have the characteristics of unique spatial electromagnetic field distribution and theoretical orthogonality of infinite dimensional modes in orbital angular momentum,the vortex electromagnetic waves show the important research value and application potential in wireless communication field and radar detection and imaging field.Starting from the distribution and principle of the spatial electromagnetic field of the vortex electromagnetic waves,a double ring equalization antenna array with the alternating array elements in the C-band is designed,and a stacked feed network of 4-channel and 1 to 8 is designed based on the advantages of strong stripline shielding performance,so as to produce a vortex antenna feeder system with four mixed modes(+1,-1,+2,-2).the hybrid modal vortex electromagnetic wave large capacity communication system is built to test the modal isolation,the isolation of the sending and receiving antenna feeders is greater than 15 dB,on this basis,the software defined radio platform is added to verify the transmission characteristics of the multi-channel vortex wave signal of the communication system,and the test verifies that all four ports can correctly receive and demodulate electromagnetic signals,which improves 4 times in spectral efficiency.[JP]

关 键 词：混合模态 涡旋电磁波 带状线 大容量通信 OAM射频收发链路 

分 类 号：TN95[电子电信—信号与信息处理]