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

被引：41
|
作者：
Kazemi, Nazli [1 ]
Schofield, Kalvin [1 ]
Musilek, Petr [1 ,2 ]
机构：
[1] Univ Alberta, Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada
[2] Univ Hradec Kralove, Appl Cybernet, Hradec Kralove 50003, Czech Republic
来源：
SENSORS | 2021年 / 21卷 / 11期
基金：
加拿大自然科学与工程研究理事会;
关键词：
microwave sensor; negative resistance; vanadium redox flow batteries; reflective sensor; SENSITIVITY; CHARGE; STATE;
D O I：
10.3390/s21113759
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
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(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 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.
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页数：14
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