Passive UHF RFID Yarn for Relative Humidity Sensing Application

Passive UHF RFID Yarn for Relative Humidity Sensing Application

In this paper, a passive ultra-high frequency (UHF) radio frequency identification (RFID) humidity sensor tag inside a slenderly yarn is presented. The sensor tag antenna is designed within a very small diameter textile wire of less than 0.6 mm. The proposed solution is based on both theoretical ana...

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Bibliographic Details
Published in:2019 13th European Conference on Antennas and Propagation (EuCAP) pp. 1 - 4
Main Authors: Koley, Santasri, Benouakta, Sofia, Hutu, Florin, Duroc, Yvan
Format: Conference Proceeding
Language:English
Published: European Association on Antennas and Propagation 01-03-2019
Subjects:
Antennas
capacitive tuning
Europe
Humidity
humidity sensor
Radiofrequency identification
Resonant frequency
textile yarn
UHF RFID passive tags
Wires
Yarn
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Summary:In this paper, a passive ultra-high frequency (UHF) radio frequency identification (RFID) humidity sensor tag inside a slenderly yarn is presented. The sensor tag antenna is designed within a very small diameter textile wire of less than 0.6 mm. The proposed solution is based on both theoretical analysis and detailed simulation results in coherence with theory. The tag system consists of capacitive based sensor where polyimide is used as a sensing material to adapt the change with relative humidity [5]. Any variation of capacitive values will change the response of the tag. More precisely, the resonance frequency of the tag is shifted from 864.5 MHz to 867.3 MHz covering European UHF RFID frequency band when the relative humidity (HR) is varying from 35% to 95%.