Development of a Resonant Microwave Sensor for Sediment Density Characterization - Ecole Nationale d'Ingénieurs de Brest Accéder directement au contenu
Article Dans Une Revue Sensors Année : 2020

Development of a Resonant Microwave Sensor for Sediment Density Characterization

Résumé

In this study, a sensor based on the development of a planar antenna immersed in sediments dedicated to water content monitoring in this type of material is proposed and experimentally validated. It is produced by a conventional Printed Circuit Board (PCB) manufacturing process on a double-sided metalized FR4 substrate. The sensitivity of the sensor is ensured by the variation of the real part of the complex dielectric permittivity of sediments with water content at around 1 GHz. As shown, in this frequency range, electrode polarization and Maxwell-Wagner polarization effects become negligible, leading to only a bulk water polarization sensitivity. The sensor operates in the reflection mode by monitoring the variation of the resonant frequency as a function of the sediment density through the S 11 reflection measurements. An experimental sensitivity of 820 MHz.g −1 .cm 3 was achieved. Despite the simplification of data interpretation at the considered frequency, the influence of ionic species such as NaCl in sediments on the real part of the relative complex dielectric permittivity is highlighted. This demonstrates the importance of considering a second parameter such as the S 11 level at low frequency or the electrical conductivity to extract the density from the frequency measurements.
Fichier principal
Vignette du fichier
sensors-20-01058.pdf (5.97 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02966444 , version 1 (14-10-2020)

Identifiants

Citer

R. Mansour, Stéphane Rioual, Benoit Lescop, P. Talbot, M. Abboud, et al.. Development of a Resonant Microwave Sensor for Sediment Density Characterization. Sensors, 2020, 20 (4), pp.1058. ⟨10.3390/s20041058⟩. ⟨hal-02966444⟩
78 Consultations
61 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More