Passive UHF RFID enabled temperature sensor tag on cork substrate

Sergi Rima*, Apostolos Georgiadis, Ana Collado, Ricardo Gonçalves, Nuno Borges Carvalho

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)


The design of a fully passive RFID enabled temperature sensor implemented on cork substrate is presented. A passive UHF RFID tag is designed based on a commercial RFID chip and a 3D meandered dipole antenna. The antenna is fabricated by milling the radiating structure on copper tape and gluing it on a cork substrate of rectangular prism shape leading to a low profile design. The matching network of the tag chip is modified to include a thermistor element. It is optimized using electromagnetic simulation to maximize its impedance sensitivity to temperature variations thus successfully implementing a passive antenna based temperature sensor. A variation in temperature leads to a modification of the tag read range in frequency, which can be detected by a reader with frequency or power sweep capability. A UHF prototype is fabricated and measurements are presented demonstrating the sensing operation.

Original languageEnglish
Title of host publication2014 IEEE RFID Technology and Applications Conference (RFID-TA)
Number of pages4
ISBN (Electronic)978-1-4799-4680-8
Publication statusPublished - 2014
Event2014 IEEE RFID Technology and Applications Conference - Tampere, Finland
Duration: 8 Sept 20149 Sept 2014


Conference2014 IEEE RFID Technology and Applications Conference
Abbreviated titleRFID-TA 2014


  • RFID
  • antenna sensing
  • temperature sensor
  • cork


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