Photonics Research, 2016, 4 (5): 050000B9, Published Online: Nov. 23, 2016
Generation and propagation characteristics of electromagnetic vortices in radio frequency Download: 1017次
Optical vortices Optical vortices Wave-front sensing Wave-front sensing Electromagnetic optics Electromagnetic optics Microwaves Microwaves
Abstract
Electromagnetic vortices, which describe the orbital angular momentum (OAM) carrying waves with a helical phase front, have recently attracted much interest in a radio frequency domain due to their potential applications in many diverse areas. In an OAM-based scenario, the antenna for OAM mode multiplexing/demultiplexing plays an essential role in controlling the overall system performance. In this paper, we demonstrated theoretically and experimentally an easily realized OAM antenna based on the traveling-wave circular loop structure for efficiently multiplexing/demultiplexing multiple OAM modes; in addition, its general propagation characteristics including the polarization, divergence, and radiation pattern are mathematically analyzed. Schemes for antenna size reduction and various radiation pattern manipulations have also been discussed to realize a more flexible and compact system.
Shilie Zheng, Weite Zhang, Zhuofan Zhang, Xiaofeng Jin, Hao Chi, Xianmin Zhang. Generation and propagation characteristics of electromagnetic vortices in radio frequency[J]. Photonics Research, 2016, 4(5): 050000B9.