Embroidered textile frequency-splitting sensor based on stepped-impedance resonators

Paris Vélez Rasero, Ferran Martín, Raúl Fernández-García, Ignacio Gil

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Resum

This paper presents an embroidered textile frequency-splitting microwave sensor based on a pair of identical stepped-impedance resonators (SIRs) loading a microstrip transmission line. The sensor is implemented by means of conductive threads. The sensing region of the proposed structure is the capacitive square patch of one of the SIRs. If such region is kept unaltered, the structure is symmetric, and the frequency response (transmission coefficient) exhibits a single transmission zero. However, if symmetry is broken (e.g., through liquid absorption in the sensing region), the frequency response of the proposed sensor exhibits two transmission zeros (frequency splitting). The difference (in frequency and magnitude) between such zeros (or notches) is intimately related to the dielectric properties of the absorbed liquids to be sensed //μl/μl.
Idioma originalEnglish
Pàgines (de-a)8596-8603
Nombre de pàgines8
RevistaIEEE Sensors Journal
Volum22
Número9
DOIs
Estat de la publicacióAcceptat en premsa - 2022

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