RT Journal Article T1 Submersible Printed Split-Ring Resonator-Based Sensor for Thin-Film Detection and Permittivity Characterization A1 Galindo Romera, Gabriel A1 Herrainz Martínez, Francisco Javier A1 Gil Barba, Marta A1 Martínez Martínez, José Juan A1 Segovia Vargas, Daniel AB A 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. PB IEEE SN 1530-437X YR 2016 FD 2016-05-15 LK https://hdl.handle.net/10016/35634 UL https://hdl.handle.net/10016/35634 LA eng DS e-Archivo RD 18 may. 2024