Title: Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication
Abstract:Excellent 4-channel multiplexing performance for short- and long-range Orbital Angular Momentum communication (OAMC) is demonstrated using circular loop antennas proximate to a planar reflector, where...Excellent 4-channel multiplexing performance for short- and long-range Orbital Angular Momentum communication (OAMC) is demonstrated using circular loop antennas proximate to a planar reflector, where the distance between the antenna and the reflector is 2 mm to improve the mode unity. To impedance-match measured low input impedances, baluns tailored to each antenna were designed. With these fabricated OAMC modules, consisting of a 4-element antenna array, baluns and a planar reflector, satisfactory return losses are obtained. In addition, remarkably suppressed transmissions among the transmitting antennas are obtained in favor of the advanced mode unity; the transmission is less than -33.2 dB at 5.5 GHz. With these modules, performance for short-range OAMC is estimated. The transmission between antennas of the same radius, corresponding to the signal transmission, is always the maximum for each transmitting antenna. The measured transmission isolation, corresponding to the ratio of the signal to the interference, is as large as 21.9 dB. Performance for long-range OAMC is also estimated by using paraboloids and measuring equipment for accurate alignments. The measured transmission between antennas of the same radius is also the maximum, and an excellent measured transmission isolation of 23.4 dB is obtained at 5.5 GHz.Read More
Publication Year: 2018
Publication Date: 2018-11-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot