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Design of a Multipolarized RFID Reader Antenna for UHF Near-Field Applications.

Authors :
Yao, Yuan
Liang, Yishan
Yu, Junsheng
Chen, Xiaodong
Source :
IEEE Transactions on Antennas & Propagation. Jul2017, Vol. 65 Issue 7, p3344-3351. 8p.
Publication Year :
2017

Abstract

This paper presents our investigation into a novel ultrahigh-frequency (UHF) radio frequency identification (RFID) multipolarized reader antenna based on a pair of symmetrical meandering open-ended microstrip lines for near-field applications. The near-field and multipolarization operation is achieved by introducing a 90° phase shift between the currents flowing along the opposite side of two branches. The proposed antenna is shown to generate a uniform and strong electric field in its near-field region within a reading volume: 450~\text mm \times 450~\text mm \times 350 mm ( \text width \times \text length \times \text height ). The simulated and measured impedance bandwidths (−10 dB) agree very well, ranging from 825 to 965 MHz and covering the UHF RFID standard. In addition, it exhibits a low far-field gain, avoiding to misreading the tags outside the near-field region. The fabricated antenna was fully tested with multiple tag antennas that are placed in different orientations and even in a conveyor system, demonstrating a 100% reading rate of arbitrarily oriented tags within the reading zone. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0018926X
Volume :
65
Issue :
7
Database :
Academic Search Index
Journal :
IEEE Transactions on Antennas & Propagation
Publication Type :
Academic Journal
Accession number :
124027507
Full Text :
https://doi.org/10.1109/TAP.2017.2700873