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Title: An orbital angular momentum radio communication system optimized by intensity controlled masks effectively: Theoretical design and experimental verification

A system of generating and receiving orbital angular momentum (OAM) radio beams, which are collectively formed by two circular array antennas (CAAs) and effectively optimized by two intensity controlled masks, is proposed and experimentally investigated. The scheme is effective in blocking of the unwanted OAM modes and enhancing the power of received radio signals, which results in the capacity gain of system and extended transmission distance of the OAM radio beams. The operation principle of the intensity controlled masks, which can be regarded as both collimator and filter, is feasible and simple to realize. Numerical simulations of intensity and phase distributions at each key cross-sectional plane of the radio beams demonstrate the collimated results. The experimental results match well with the theoretical analysis and the receive distance of the OAM radio beam at radio frequency (RF) 20 GHz is extended up to 200 times of the wavelength of the RF signals, the measured distance is 5 times of the original measured distance. The presented proof-of-concept experiment demonstrates the feasibility of the system.
Authors:
 [1] ;  [2] ; ; ; ; ; ;  [1] ;  [3]
  1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
  2. (China)
  3. Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875 (China)
Publication Date:
OSTI Identifier:
22395518
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTENNAS; CAPACITY; CHANNELING; COMPUTERIZED SIMULATION; DISTANCE; GAIN; GHZ RANGE; ORBITAL ANGULAR MOMENTUM; RADIOWAVE RADIATION; SIGNALS; VERIFICATION; WAVE PROPAGATION