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Compact RFID tag antenna with circular polarization and embedded feed network for metallic objects
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP. South China Normal University (SCNU), China.
2014 (English)In: IEEE Antennas and Wireless Propagation Letters, ISSN 1536-1225, E-ISSN 1548-5757, Vol. 13, 1271-1274 p., 6843861Article in journal (Refereed) Published
Abstract [en]

A low-profile radio frequency identification (RFID) tag antenna is proposed with a compact size of 45 × 45~mm2 and circular polarization (CP) for metallic surfaces. A star-shaped slot is etched onto the antenna for the CP and antenna size reduction. A terminal-grounded L-shaped feedline is embedded in the etched slot to efficiently excite the wideband CP mode, complexly match the tag-antenna impedance, and further reduce the antenna size. The embedded feed structure also helps achieve a relatively higher gain, resulting in a longer reading range. The proposed antenna can cover the impedance bandwidth of 60 MHz (from 880 to 940 MHz) as well as the 3-dB CP bandwidth of 12 MHz (from 905 to 917 MHz). Further results demonstrate that the proposed tag antenna provides a stable reading range when mounted on metal plates of various sizes.

Place, publisher, year, edition, pages
2014. Vol. 13, 1271-1274 p., 6843861
Keyword [en]
Circular polarization, grooved patch antenna, proximity-coupled feed network, radio frequency identification (RFID) tag
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-161535DOI: 10.1109/LAWP.2014.2333365ISI: 000350282600008ScopusID: 2-s2.0-84904709270OAI: diva2:794663
Swedish Research Council

QC 20150312

Available from: 2015-03-12 Created: 2015-03-12 Last updated: 2015-03-27Bibliographically approved

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He, Sailing
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Electromagnetic EngineeringZhejiang-KTH Joint Research Center of Photonics, JORCEP
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IEEE Antennas and Wireless Propagation Letters
Communication Systems

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