A high-gain passive UHF-RFID tag with increased read range

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Abstract

© 2016 by the authors; licensee MDPI, Basel, Switzerland. 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.
Original languageEnglish
Article number1150
JournalSensors (Switzerland)
Volume16
Issue number7
DOIs
Publication statusPublished - 22 Jun 2016

Keywords

  • Dipole antennas
  • Impedance matching
  • Radio-frequency identification (RFID)

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