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Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications

A microstrip defect ground structure (DGS) based on a pair of dumbbell-shaped slots is used for sensing. The device is a differential sensor consisting of a pair of mirrored lines loaded with a dumbbell-shaped DGS, and the output variable is the cross-mode transmission coefficient. Such a variable i...

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Autores principales: Vélez, Paris, Muñoz-Enano, Jonathan, Gil, Marta, Mata-Contreras, Javier, Martín, Ferran
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6679327/
https://www.ncbi.nlm.nih.gov/pubmed/31331078
http://dx.doi.org/10.3390/s19143189
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author Vélez, Paris
Muñoz-Enano, Jonathan
Gil, Marta
Mata-Contreras, Javier
Martín, Ferran
author_facet Vélez, Paris
Muñoz-Enano, Jonathan
Gil, Marta
Mata-Contreras, Javier
Martín, Ferran
author_sort Vélez, Paris
collection PubMed
description A microstrip defect ground structure (DGS) based on a pair of dumbbell-shaped slots is used for sensing. The device is a differential sensor consisting of a pair of mirrored lines loaded with a dumbbell-shaped DGS, and the output variable is the cross-mode transmission coefficient. Such a variable is very sensitive to asymmetries in the line pair, e.g., caused by an asymmetric dielectric load in the dumbbell-shaped DGSs. Therefore, the sensor is of special interest for the dielectric characterization of solids and liquids, or for the measurement of variables related to complex permittivity changes. It is shown in this work that by adding fluidic channels on top of the dumbbell-shaped DGSs, the device is useful for liquid characterization, particularly for the measurement of solute concentration in very diluted solutions. A sensitivity analysis useful for sensor design is carried out in this paper.
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spelling pubmed-66793272019-08-19 Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications Vélez, Paris Muñoz-Enano, Jonathan Gil, Marta Mata-Contreras, Javier Martín, Ferran Sensors (Basel) Article A microstrip defect ground structure (DGS) based on a pair of dumbbell-shaped slots is used for sensing. The device is a differential sensor consisting of a pair of mirrored lines loaded with a dumbbell-shaped DGS, and the output variable is the cross-mode transmission coefficient. Such a variable is very sensitive to asymmetries in the line pair, e.g., caused by an asymmetric dielectric load in the dumbbell-shaped DGSs. Therefore, the sensor is of special interest for the dielectric characterization of solids and liquids, or for the measurement of variables related to complex permittivity changes. It is shown in this work that by adding fluidic channels on top of the dumbbell-shaped DGSs, the device is useful for liquid characterization, particularly for the measurement of solute concentration in very diluted solutions. A sensitivity analysis useful for sensor design is carried out in this paper. MDPI 2019-07-19 /pmc/articles/PMC6679327/ /pubmed/31331078 http://dx.doi.org/10.3390/s19143189 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vélez, Paris
Muñoz-Enano, Jonathan
Gil, Marta
Mata-Contreras, Javier
Martín, Ferran
Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title_full Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title_fullStr Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title_full_unstemmed Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title_short Differential Microfluidic Sensors Based on Dumbbell-Shaped Defect Ground Structures in Microstrip Technology: Analysis, Optimization, and Applications
title_sort differential microfluidic sensors based on dumbbell-shaped defect ground structures in microstrip technology: analysis, optimization, and applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6679327/
https://www.ncbi.nlm.nih.gov/pubmed/31331078
http://dx.doi.org/10.3390/s19143189
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