A High-Resolution Reflective Microwave Planar Sensor for Sensing of Vanadium Electrolyte

Sensors

Petr Musilek¹  Nazli Kazemi¹  Kalvin Schofield¹ 

[1] Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada;

关键词: microwave sensor;    negative resistance;    vanadium redox flow batteries;    reflective sensor;   

DOI  :  10.3390/s21113759

来源: DOAJ

【 摘 要 】

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 $f_{\mathrm{res}}=6$ 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 $S_{11}$ 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 ${\mathrm{V}}^{5+}$ and fully discharged ${\mathrm{V}}^{4+}$ electrolytes.

【 授权许可】

Unknown