A High-Resolution Reflective Microwave Planar Sensor for Sensing of Vanadium Electrolyte
Nazli Kazemi, Kalvin Schofield, Petr Musı́lek
Abstract
Microwave planar sensors employ conventional passive complementary split ring resonators (CSRR) as their sensitive region. In this work, a novel planar reflective sensor is introduced that deploys CSRRs as the front-end sensing element at fres=6 GHz with an extra loss-compensating negative resistance that restores the dissipated power in the sensor that is used in dielectric material characterization. It is shown that the S11 notch of -15 dB can be improved down to -40 dB without loss of sensitivity. An application of this design is shown in discriminating different states of vanadium redox solutions with highly lossy conditions of fully charged V5+ and fully discharged V4+ electrolytes.
Topics & Concepts
PlanarMicrowaveMaterials scienceOptoelectronicsSplit-ring resonatorElectrolyteResonatorDielectricVanadiumOpticsElectrodeComputer scienceChemistryTelecommunicationsPhysicsComputer graphics (images)MetallurgyPhysical chemistryMicrowave and Dielectric Measurement TechniquesAcoustic Wave Resonator TechnologiesGas Sensing Nanomaterials and Sensors