A highly sensitive substrate integrated waveguide interferometer applied to humidity sensing


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Benleulmi, A., Boubekeur, N. et Massicotte, D. (2019). A highly sensitive substrate integrated waveguide interferometer applied to humidity sensing. IEEE Microwave and Wireless Components Letters, 29 (1). p. 68-70. ISSN 1558-1764 DOI 10.1109/LMWC.2018.2882302

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This letter presents a new generation of radio frequency interferometric sensors. Herein, an original, simple, and monolithic interferometer based on substrate integrated waveguide technology is introduced for the first time. In order to demonstrate its potential for measurement applications, the proposed structure has been studied as a humidity-sensing element. Its detection principle is based on the variation of the effective dielectric constant of a sensitive branch due to the variation of the humid air dielectric constant. The sensitive characteristics of the structure have been investigated in the range of 20%-70% relative humidity. An analytical model that predicts the frequency shift and estimates the humidity level is proposed. The substrate integrated interferometer can be used in many measurement applications such as dielectric material characterization and environmental detection.

Type de document: Article
Mots-clés libres: Interferometer Passive Radio frequency (RF) Sensor Substrate integrated waveguide (SIW)
Date de dépôt: 09 mai 2022 13:39
Dernière modification: 09 mai 2022 13:39
Version du document déposé: Post-print (version corrigée et acceptée)
URI: https://depot-e.uqtr.ca/id/eprint/10147

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