Galindo Romera, GabrielHerrainz Martínez, Francisco JavierGil Barba, MartaMartínez Martínez, José JuanSegovia Vargas, Daniel2022-09-142022-09-142016-05-15Galindo-Romera, G., Herraiz-Martínez, F. J., Gil, M., Martínez-Martínez, J. J., & Segovia-Vargas, D. (2016). Submersible Printed Split-Ring Resonator-Based Sensor for Thin-Film Detection and Permittivity Characterization. IEEE Sensors Journal, 16(10), 3587–3596.1530-437Xhttps://hdl.handle.net/10016/35634A split-ring resonator (SRR)-based sensor for the detection of solid thickness and relative permittivity characterization of solid and liquid materials is proposed. The structure is composed of two SRRs hosted in a microstrip transmission line. The sensing principle is based on the detection of the notch introduced by the resonators in the transmission coefficient. Hence, a frequency shift of the notch is related to a change in the effective permittivity of the structure when the sensor is covered with any solid or liquid material. A complete characterization of the sensor, for the three proposed applications, is performed through simulations. Finally, all simulated results are corroborated with measurements. The proposed sensor is implemented in single-layer printed technology, resulting in a low-cost and low-complexity solution. It presents real-time response and high sensitivity. Moreover, it is fully submersible and reusable.eng© 2016 IEEEEffective permittivityResonatorSensorSplit-ring resonator (srr)Submersible sensorDielectric characterizationMicrofluidic sensorMetamaterialsSensitivityLinesresearch articleElectrónicahttps://doi.org/10.1109/JSEN.2016.2538086open access3587103596IEEE Sensors Journal16AR/0000018654