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Sensors 2016, 16(7), 1150; doi:10.3390/s16071150

A High-Gain Passive UHF-RFID Tag with Increased Read Range

Departament d’Enginyeria Electrònica, Universitat Autònoma de Barcelona (UAB), Campus UAB, Bellaterra, Barcelona 08193, Spain
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Academic Editor: Vittorio M. N. Passaro
Received: 14 June 2016 / Revised: 19 July 2016 / Accepted: 19 July 2016 / Published: 22 July 2016
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Abstract

In this work, a passive ultra-high frequency radio-frequency identification UHF-RFID tag based on a 1.25 wavelengths thin dipole antenna is presented for the first time. The length of the antenna is properly chosen in order to maximize the tag read range, while maintaining a reasonable tag size and radiation pattern. The antenna is matched to the RFID chip by means of a very simple matching network based on a shunt inductance. A tag prototype, based on the Alien Higgs-3 chip, is designed and fabricated. The overall dimensions are 400 mm × 14.6 mm, but the tag width for most of its length is delimited by the wire diameter (0.8 mm). The measured read range exhibits a maximum value of 17.5 m at the 902–928 MHz frequency band. This represents an important improvement over state-of-the-art passive UHF-RFID tags. View Full-Text
Keywords: dipole antennas; impedance matching; radio-frequency identification (RFID) dipole antennas; impedance matching; radio-frequency identification (RFID)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zuffanelli, S.; Aguila, P.; Zamora, G.; Paredes, F.; Martin, F.; Bonache, J. A High-Gain Passive UHF-RFID Tag with Increased Read Range. Sensors 2016, 16, 1150.

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