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Página principal > Artículos > Artículos publicados > Parametric analysis of the edge capacitance of uniform slots and application to frequency-variation permittivity sensors |
Fecha: | 2021 |
Resumen: | This paper presents a parametric analysis relative to the effects of the dielectric constant of the substrate, substrate thickness and slot width on the edge capacitance of a slot-based resonator. The interest is to find the conditions (ranges of the previously cited parameters) compatible with the presence of a quasi-magnetic wall in the plane of the slot (or plane of the metallization). If such magnetic wall is present (or roughly present), the electric field in the plane of the slot is tangential (or quasi-tangential) to it and the edge capacitance can be considered to be the parallel combination of the capacitances at both sides of the slot. Moreover, variations in one of such capacitances, e. g. , caused by a change in the material on top of the slot, or by a modification of the dielectric constant of the substrate do not affect the opposite capacitance. Under the magnetic wall approximation, the capacitance of certain electrically small slot-based resonators can be easily linked to the dielectric constant of the material present on top of it. The consequence is that such resonators can be used as sensing elements in a permittivity sensor and the dielectric constant of the so-called material under test (MUT) can be determined from the measured resonance frequency and a simple analytical expression. In this paper, the results of this parametric analysis are validated by considering several sensing structures based on dumbbell defect ground structure (DB-DGS) resonators of different dimensions. |
Ayudas: | Agencia Estatal de Investigación PID2019-103904RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159 Agencia Estatal de Investigación IJC2019-040786-I |
Nota: | Altres ajuts: ICREA, and by FEDER funds, Secreteraria d'Universitats i Recerca (Generalitat de Catalunya) and European Social Fund for the FI grant |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Materia: | Microwave sensor ; Permittivity sensor ; Dielectric constant ; Slot resonator ; Magnetic wall |
Publicado en: | Applied sciences (Basel), Vol. 11, Num. 15 (July 2021) , art. 7000, ISSN 2076-3417 |
15 p, 760.3 KB |