A Concentric Array for Generating Multimode OAM Waves  

作　　者：Yanni Wang Xuehong Sun Liping Liu 

机构地区：[1]School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,China [2]Ningxia Key Laboratory of Intelligent Sensing of Desert Information,Ningxia University,Yinchuan 750021,China

出　　处：《Journal of Communications and Information Networks》2022年第3期333-348,共16页通信与信息网络学报（英文）

基　　金：supported by the National Natural Science Foundation of China under Grant 62061039.

摘　　要：For the problem of multiplexing multimodal vortex electromagnetic waves,a double-ring concentric uniform circular array(CUCA)consisting of 12 circularly polarized antennas(4 inner rings and 8 outer rings)is proposed in this paper.A complex feeding network is solved by rotating the circularly polarized antennas at a certain angle.The antennas are rotationally symmetric and point to the center,generating orbital angular momentum(OAM)waves by feeding the same amplitude and phase signals.In addition,this paper combines millimeter wave(mm-wave)and ultra-wideband(UWB)with OAM.The proposed antenna array can generate OAM beams at 30∼40 GHz with l=−1,−2.When l=−1 the relative bandwidth is 25.2% and the gain is 8.03 dBi;when l=−2 the relative bandwidth is 27.7% and the gain is 9.43 dBi.The analysis of simulation results shows that the antenna array has UWB performance,good gain,and a standard spiral phase distribution,which can provide some practical significance for modal multiplexing of mm-wave band OAM.

关 键 词：orbital angular momentum(OAM) concentric uniform circular array(CUCA) millimeter wave(mm-wave) ultra-wideband(UWB) modal multiplexing 

分 类 号：O44[理学—电磁学]