Printed microwave frequency humidity sensor operating with phase shifting scheme

Eyebe, G. A., Bideau, B., Loranger, E. et Domingue, F. (2021). Printed microwave frequency humidity sensor operating with phase shifting scheme. IEEE Sensors Journal, 21 (3). pp. 2854-2863. ISSN 1530-437X DOI 10.1109/JSEN.2020.3021951

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Résumé

This paper investigates a shifting sensing scheme combining slots, transmission lines, and printing technologies. This sensing scheme translates the electrical sensitivity of a transmission line conductor to the insertion phase as a measurement variable. A coplanar waveguide (CPW) based structure was designed, screen-printed, and tested on relative humidity (RH) conditions ranging from 22.8-75.3 %RH. For the first time, a composite material made of poly-pyrrole and TEMPO Oxidized Cellulose Nanofibers (TOCN/PPy) was integrated to the structure and studied as a humidity sensitive conductor in microwave frequencies. The measured sensitivity was 0.154°/%RH at 5.870 GHz, while insertion losses decreased by 1.26 dB. The effects of sensing layers thickness as well as trade-off considerations between phase sensitivity and signal attenuation were analyzed by simulation. © 2001-2012 IEEE.

Type de document:	Article
Mots-clés libres:	RFID RH sensing screen-printing TOCN/PPy aromatic compounds cellulose nanocrystals composite structures coplanar waveguides economic and social effects electric lines microwave frequencies coplanar wave-guide (CPW) humidity sensitive insertion phase phase sensitivity printing technologies sensing schemes signal attenuation TEMPO-oxidized cellulose nanofibers microwave sensors frequency humidity insertion phases sensitivity thickness transmission Lines
Date de dépôt:	01 juill. 2021 12:18
Dernière modification:	01 juill. 2021 12:18
Version du document déposé:	Post-print (version corrigée et acceptée)
URI:	https://depot-e.uqtr.ca/id/eprint/9638

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