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Humidity passive sensors based on UHF RFID using cork dielectric slabs

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication2015 9th European Conference on Antennas and Propagation, EuCAP 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788890701856
Publication statusPublished - 27 Aug 2015
Publication typeA4 Article in a conference publication
Event9th European Conference on Antennas and Propagation, EuCAP 2015 - Lisbon, Portugal
Duration: 13 May 201517 May 2015

Conference

Conference9th European Conference on Antennas and Propagation, EuCAP 2015
CountryPortugal
CityLisbon
Period13/05/1517/05/15

Abstract

In this paper we show the design of passive UHF RFID tag antenna on cork substrate. Due to the cork sensitivity to humidity changes, we can use the developed sensor to sense changes in the relative humidity of the environment, without the need for batteries. The antenna is built using inkjet printing technology, which allows a good accuracy of the design manufacturing. The sensor proved usable for humidity changes detection with a variation of threshold power from 11 to 15 dB between 60 and near 100% humidity levels. Presenting, therefore, reading ranges between 3 to 5 meters.

Keywords

  • cork substrate, humidity sensor, RFID