Active metasurface in reflection manner for generation of reconfigurable OAM vortex beams  

作　　者：Yunfei Liu Yueyi Yuan Qun Wu Kuang Zhang 

机构地区：[1]The School of Electronic and Information Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Information and Intelligence》2023年第3期197-206,共10页信息与智能学报（英文）

基　　金：supported by the National Natural Science Foundation of China(62171165)。

摘　　要：In this paper,we proposed an active metasurface in reflection manner that can generate reconfigurable OAM vortex beams with high purity in the X-band.The metasurface has a high reflectance of 0.94 and achieves a phase coverage of 320between 9.8 GHz and 11 GHz.Then,by encoding the phase distribution of the meta-atoms,various OAM vortex beams including 1,2,3,and 4 orders are generated,where the purity of all modes can be above 70%.Moreover,the metasurface can also deflect the OAM beam with a certain angle while maintaining high purity,which can be applied to reduce the influence of the alignment deviation between transmitting and receiving antennas during the communication processes.As a validation,the metasurface composed of 30×30 meta-atoms is fabricated and measured.Both simulation and measurement results demonstrate the capability of the proposed metasurface to generate reconfigurable OAM beams with high purity,indicating the application potentials of proposed meta-devices in future OAM communications.

关 键 词：Orbital angular momentum(OAM) Active metasurface RECONFIGURABLE High purity X-BAND 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]