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RFID coverage extension using microstrip-patch antenna array

Abbak, Mehmet and Tekin, İbrahim (2009) RFID coverage extension using microstrip-patch antenna array. IEEE Antennas and Propagation Magazine, 51 (1). pp. 185-191. ISSN 1045-9243

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Official URL: http://dx.doi.org/10.1109/MAP.2009.4939065

Abstract

In this paper, a UHF-band 2 x 2 microstrip phased-array antenna is designed and implemented to extend the coverage of an RFID reader system. The phased-array antenna has four microstrip-patch antennas, three Wilkinson power dividers, and a transmission-line phase shifter. These are printed on a dielectric substrate with a dielectric constant of 4.5. The array has dimensions of 34 cm x 45 cm, operating at a frequency of 867 MHz, as specified in RFID Gen2 protocol European standards. The phased-array antenna has a measured directivity of 12.1 dB, and the main-beam direction can be steered to angles of +/- 40 degrees, with a HPBW of 90 degrees. The phased-array antenna is used as the receiving antenna in a commercial reader system. Experimental results indicate that the coverage of the RFID system with the phased-array antenna is superior to the coverage with a conventional broader-beamwidth microstrip-patch antenna. The proposed system can also be used for a wireless positioning system.

Item Type:Article
Uncontrolled Keywords:RFID; identification; microstrip antennas; UHF antennas; array antennas
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:11974
Deposited By:İbrahim Tekin
Deposited On:17 Sep 2009 16:45
Last Modified:25 May 2011 14:20

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