An improved uniplanar front-directional antenna for dual-band RFID readers

Mobashsher, Ahmed Toaha and Aldhaheri, Rabah W. (2012) An improved uniplanar front-directional antenna for dual-band RFID readers. IEEE Antennas and Wireless Propagation Letters, 11 1438-1441. doi:10.1109/LAWP.2012.2229956

Author Mobashsher, Ahmed Toaha
Aldhaheri, Rabah W.
Title An improved uniplanar front-directional antenna for dual-band RFID readers
Journal name IEEE Antennas and Wireless Propagation Letters   Check publisher's open access policy
ISSN 1536-1225
Publication date 2012
Sub-type Article (original research)
DOI 10.1109/LAWP.2012.2229956
Volume 11
Start page 1438
End page 1441
Total pages 4
Place of publication Piscataway, NJ, United States
Publisher Institute of Electrical and Electronics Engineers
Collection year 2013
Language eng
Abstract Radio frequency identification (RFID) excelled in automatic identification and data collection industry through its speed, agility, and endurance. In this letter, an improved uniplanar antenna for handheld RFID reader applications covering free ISM bands of 2.45 and 5.8 GHz is presented. The antenna is composed of a microstrip feeding line, two unsymmetrical ground planes, and a folded strip with a small top branch. The folded strips generate radiations in resonances and the ground, which act as reflectors, force the radiation in the endfire direction. The impedance matching and bandwidth of the antenna is improved by inserting optimized triangular periodic open-end stub (POES) cells on the top edge of the coplanar ground. A good impedance bandwidth of 320 MHz is achieved in measurement (from 2.35 to 2.67 GHz for the lower band), while the upper band covers 310 MHz (from 5.60 to 5.91 GHz). Also, good polarization purity, front-to-back ratio, and gain are found, which makes the antenna a strong candidate for compact handheld RFID reader applications.
Keyword Antenna
Dual-band antenna
Front-directional radiation patterns
Improved impedance matching
Radio frequency identification (RFID)
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Information Technology and Electrical Engineering Publications
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