NGOUNE, Bernard Bobby; HALLIL, Hamida; BILA, Stephane; BAILLARGEAT, Dominique; BONDU, Benoit; CLOUTET, Eric; DEJOUS, Corinne

doi:10.1109/ICECS202256217.2022.9971127

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NGOUNE, Bernard Bobby
Laboratoire de l'intégration, du matériau au système [IMS]

HALLIL, Hamida
Laboratoire de l'intégration, du matériau au système [IMS]

BILA, Stephane

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Communication dans un congrès

Ce document a été publié dans

2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2022-10-24, Glasgow. 2022-10p. 1-4

Résumé en anglais

A dual flexible microwave sensor is presented for humidity and temperature sensing. The sensor consists of two microstrip interdigitated resonators printed on a flexible Kapton substrate. One resonator is coated with polyethyleneimine silane 1:0.5 and the other is left uncoated. The coated resonator at 3.26 GHz showed a good sensitivity of - 0.45 MHz/%RH and -0.01 dB/%RH in a range of 35 - 85 % RH, with low hysteresis (<5%), and -0.192 MHz/°C and 0.01 dB/°C in a range of 30 - 45 °C. On the other hand, the uncoated resonator showed a linear response and high hysteresis (> 30%) with a low sensitivity of -0.045 MHz/%RH and 0 dB/%RH under humidity. It showed a temperature sensitivity of 0.07 MHz/oC and 0.01 dB/oC. RH sensitivity does not vary with temperature for both the coated and uncoated resonators. The uncoated resonator showed a distinct RH-independent temperature sensitivity in magnitude which makes it easier to decorrelate variations of both parameters.< Réduire

Mots clés

Temperature sensors

Microwave integrated circuits

Sensitivity

Humidity

Microwave sensors

Microwave circuits

Sensors

Dual microwave sensor

Humidity

Temperature

Polymer sensitive material

Passive resonator

URI

https://oskar-bordeaux.fr/handle/20.500.12278/199818

DOI

http://dx.doi.org/10.1109/ICECS202256217.2022.9971127

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Humidity and Temperature Dual Flexible Microwave Sensor

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Humidity and Temperature Dual Flexible Microwave Sensor

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Unités de recherche