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International Journal of Antennas and Propagation
Volume 2014, Article ID 149051, 5 pages
http://dx.doi.org/10.1155/2014/149051
Research Article

Study on the Optically Transparent Near-Field and Far-Field RFID Reader Antenna

Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic Engineering, Beijing University of Posts and Telecommunications, No. 10 Xitucheng Road, Beijing, China

Received 18 November 2013; Accepted 8 February 2014; Published 13 March 2014

Academic Editor: Chaowei Wang

Copyright © 2014 Yuan Yao 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

A study on the optically transparent RFID reader antenna which can operate in both near-field and far-field is proposed in this paper. The antenna with a dimension of 45 mm × 45 mm is fabricated using Indium tin oxide film and can operate from 915 to 935 MHz covering the China UHF RFID band. The strong and uniform magnetic field is excited by magnetic dipole source. Both simulation and measurement results are shown to illustrate the performance of the proposed antenna. The measured reading distances are up to 40 mm and 100 mm for near-field and far-field applications, respectively.