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International Journal of Antennas and Propagation
Volume 2018, Article ID 5634826, 9 pages
https://doi.org/10.1155/2018/5634826
Research Article

Indoor Propagation of Electromagnetic Waves with Orbital Angular Momentum at 5.8 GHz

Department of Electronic Engineering, Sogang University, 1 Sinsu-dong, Mapo-gu, Seoul, Republic of Korea

Correspondence should be addressed to Haengseon Lee; rk.ca.gnagos@59sheel

Received 15 June 2017; Revised 17 November 2017; Accepted 18 December 2017; Published 31 January 2018

Academic Editor: Paolo Baccarelli

Copyright © 2018 Boseok Jeong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Propagation of electromagnetic waves with orbital angular momentum (OAM) is investigated in indoor environments. The OAM modes generated by circular patch array antennas are used. With proper alignment and suppressed multipath, the OAM modes can transport multiple wireless data stream at the same time. Through measurements and ray-tracing simulations, it is found that the advantages of OAM modes are limited if those two conditions are not satisfied. It is also found that multipath effect can be enervated by using narrow beam antennas.