Realization of multiple orbital angular momentum modes simultaneously through four-dimensional antenna arrays

Chao Sun; Shiwen Yang; Yikai Chen; Jixin Guo; Shiwei Qu

doi:10.1038/s41598-017-18264-3

Realization of multiple orbital angular momentum modes simultaneously through four-dimensional antenna arrays

Sci Rep. 2018 Jan 9;8(1):149. doi: 10.1038/s41598-017-18264-3.

Authors

Chao Sun¹, Shiwen Yang², Yikai Chen¹, Jixin Guo¹, Shiwei Qu¹

Affiliations

¹ School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 611731, P. R. China.
² School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 611731, P. R. China. swnyang@uestc.edu.cn.

Abstract

Electromagnetic waves carrying orbital angular momentum (OAM) in radio frequency range have drawn great attention owing to its potential applications in increasing communication capacity. In this paper, both single-pole single-throw (SPST) switches and single-pole double-throw (SPDT) switches are designed and implemented. Optimal time sequence allows four-dimensional (4-D) circular antenna array to generate multiple OAM-carrying waves as well as enhance the field intensity of each OAM-carrying wave. A novel experimental platform is developed to measure the phase distribution when the transmitting antenna and the receiving antenna operate at different frequencies. The good agreement between the measurement and simulation results demonstrate that 4-D circular antenna array is able to generate multiple OAM modes simultaneously. Furthermore, the superiority of the 4-D circular antenna array in receiving and demodulating multiple OAM-carrying signals is validated through the filter and bit error rate (BER) simulations.

Publication types

Research Support, Non-U.S. Gov't