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Coplanar UHF RFID tag antenna with U-shaped inductively coupled feed for metallic applications


Al Khanjar, Karrar Naji Salman and Ismail, Alyani and Raja Abdullah, Raja Syamsul Azmir and Saeedi, Tale (2017) Coplanar UHF RFID tag antenna with U-shaped inductively coupled feed for metallic applications. PLOS ONE, 12 (6). art. no. e0178388. pp. 1-25. ISSN 1932-6203


In this paper, we present a novel compact, coplanar, tag antenna design for metallic objects. Electrically small antenna has designed for a UHF RFID (860–960 MHz) based on a proximity-coupled feed through. Furthermore, two symmetrical Via-loaded coplanar grounds fed by a U-shaped inductively coupled feed through an embedded transmission line. This configuration results in an antenna with dimensions of 31 × 19.5 × 3.065 mm3 at 915 MHz, and the total gain for the antenna is 0.12 dBi. The Via-loaded coplanar and U-shaped inductively coupled feeds allow the antenna to provide flexible tuning in terms of antenna impedance. In addition, a figure of merit is applied for the proposed tag antenna, and the results are presented. The read range is measured to be 4.2 m, which is very close to simulated values. This antenna measurement shows very good agreement with simulations.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1371/journal.pone.0178388
Publisher: Public Library of Science
Keywords: Coplanar; Tag antenna; Metallic objects; UHF RFID; U-shaped inductively coupled feed
Depositing User: Nabilah Mustapa
Date Deposited: 31 Jul 2017 05:18
Last Modified: 31 Jul 2017 05:18
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1371/journal.pone.0178388
URI: http://psasir.upm.edu.my/id/eprint/56296
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