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Highly-sensitive microwave sensors based on open complementary split ring resonators (OCSRRs) for dielectric characterization and solute concentration measurement in liquids
Vélez Rasero, Paris (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Grenier, Katia (Centre national de la recherche scientifique. Laboratory of Analysis and Architecture of Systems)
Mata Contreras, Francisco Javier (Universidad de Málaga. Departamento de Ingeniería de Comunicaciones)
Dubuc, David (Centre national de la recherche scientifique. Laboratory of Analysis and Architecture of Systems)
Martín, Ferran, (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date: 2018
Abstract: Differential permittivity sensors based on a pair of uncoupled microstrip lines, each one loaded with an open complementary split ring resonator (OCSRR), are proposed in this paper. The sensing principle is based on the measurement of the cross-mode insertion loss, very sensitive to asymmetric loading. Thus, by loading one of the OCSRRs with the reference sample, and the other one with the sample under test (SUT), the difference in the complex permittivity between both samples generates an asymmetry that gives rise to mode conversion. From the measurement of the cross-mode transmission coefficient, the dielectric properties of the SUT can be determined, provided those of the reference sample are well known. It is shown that by adding fluidic channels on top of the OCSRRs, the proposed sensor is useful for the measurement of the complex dielectric constant of liquids, and experimental results in mixtures of ethanol and deionized (DI) water and methanol in DI water, as a function of the ethanol/methanol content, are provided. Due to the high sensitivity of the proposed differential sensor to detect small perturbations (asymmetries), the structure is also of interest for the accurate measurement of solute concentrations in liquid solutions. In this paper, the structure is applied to monitor sodium content in aqueous solutions, and it is found that sodium concentrations as small as 0. 25 g/L can be resolved.
Note: Número d'acord de subvenció MINECO/TEC2016-75650-R
Note: Número d'acord de subvenció MINECO/TEC2013-40600-R M
Note: Número d'acord de subvenció AGAUR/2017SGR-1159
Note: Número d'acord de subvenció AGAUR/ACCIO/TECSPR15-1-0050
Rights: Tots els drets reservats
Language: Anglès
Document: article ; recerca ; publishedVersion
Published in: IEEE Access, Vol. 6 (2018) , p. 48324-48338, ISSN 2169-3536

DOI: 10.1109/ACCESS.2018.2867077


15 p, 2.2 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Engineering > CIMITEC-UAB
Articles > Research articles
Articles > Published articles

 Record created 2018-11-27, last modified 2020-08-30



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