DocumentCode :
3610623
Title :
Passive Microwave Substrate Integrated Cavity Resonator for Humidity Sensing
Author :
El Matbouly, Hatem ; Boubekeur, Naimi ; Domingue, Frederic
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. du Quebec a Trois-Rivieres, Trois-Rivières, QC, Canada
Volume :
63
Issue :
12
fYear :
2015
Firstpage :
4150
Lastpage :
4156
Abstract :
This paper presents an original passive microwave substrate integrated cavity resonator [substrate integrated waveguides (SIWs)] as an environment sensor for humidity detection. The proposed structures are based on a high quality factor (Q ~ 300) substrate integrated cavity resonator operating at 3.6 and 4.15 GHz. The detection principle is based on a frequency shift due to the permittivity variation of the humid air. This variation can be detected and used as the sensor indication. The frequency shift has been estimated analytically using the dielectric perturbation method for the resonator prototypes. The structure of the presented SIW resonators has been tested in the presence of humidity and shows sensitive characteristics in the range of 0%-80% relative humidity in accordance with the proposed model. A comparison of sensitivity performance between the new structure and other reported microwave components for environmental sensing is also presented. Measurements of repeatability and reliability for the proposed structure are discussed as well. As a new microwave component type, the proposed substrate integrated environmental sensor has the advantage of providing a new fabrication solution for radio frequency environmental sensing and greatly simplifies the sensor´s manufacturing processes and cost.
Keywords :
Q-factor; atmospheric measuring apparatus; cavity resonators; humidity sensors; microwave detectors; reliability; substrate integrated waveguides; SIW resonators; dielectric perturbation method; frequency 3.6 GHz to 4.15 GHz; humid air; humidity detection; humidity sensing; passive microwave substrate integrated cavity resonator; permittivity variation; quality factor; radiofrequency environmental sensing; reliability measurement; repeatability measurement; Cavity resonators; Dielectrics; Humidity; Microwave theory and techniques; Resonant frequency; Sensors; Substrates; Cavity resonators; environmental sensor; microwave detection; passive; substrate integrated waveguides (SIWs);
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2015.2495346
Filename :
7330046
Link To Document :
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