Paper Info
Title
High Performance Oam Communication Exploiting Port-Azimuth Effect Of Loop Antennas
Abstract
In this paper, we show that the orbital angular momentum (OAM) communication performance with a circular loop antenna array can be drastically improved by exploiting the port azimuth effect at the 5-GHz band. The received signal and interference powers are analytically derived with generalized Z-matrices and the perturbation method for short-range OAM communication. The resulting formulas show that the interference power can be drastically suppressed by selecting the proper combination of port azimuths. We also explain the mechanism behind the reduction in interference power. For the obtained port azimuth combination, the simulated and measured transmission isolations at 1 cm are better than 24.0 and 23.6 dB at 5.3 GHz, respectively. Furthermore, to estimate performance in 2 x 2 MIMO communication, constellations for 64-QAM are estimated. Measured EVMs are less than 3% where signals are clearly discriminated without any signal processing. For long-range OAM communication using paraboloids, the optimum port azimuth combination is estimated by monitoring the current distribution. For the obtained combination of the port azimuths, simulated and measured transmission isolations at 125 cm are better than 15.7 and 12.0 dB at 5.3 GHz, respectively. The measured isolation for short and long ranges are improved by 9.2 and 4.5 dB, respectively, compared with the data for the combination of the identical port azimuth.
Year
DOI
Venue
2019
10.1587/transcom.2018EBP3353
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
loop antenna, orbital angular momentum, multiplexing
Computer science,Computer network,Azimuth,Computer hardware
Journal
Volume
Issue
ISSN
E102B
12
0916-8516
Citations 
PageRank 
References 
0
0.34
0
Authors
6
Name
Order
Citations
PageRank
Hiroto Otsuka100.34
Ryohei Yamagishi200.34
Akira Saitou354.55
H. Suzuki423831.31
Ryo Ishikawa587.74
Kazuhiko Honjo61211.55