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Differential Microwave Microfluidic Sensor Based on Microstrip Complementary Split-Ring Resonator (MCSRR) Structure
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DOI：10.1109/JSEN.2020.2973196.png)
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Abstract
En 中文
This paper presents a differential microwave microfluidic sensor based on the microstrip complementary split-ring resonator (MCSRR) structure for liquid characterization. At the resonance, the electric field concentrates along the slot, where the microfluidic channel is located. As the liquid sample is injected, the corresponding reflection coefficient is changed, while the reference response is unaffected. The relative permittivity and loss tangent of the liquid can be extracted from the variations in the resonant frequency and quality factor. A prototype of the proposed sensor is fabricated and measured for functionality validation. The proposed sensor exhibits a high sensitivity of 0.626% on average and is capable of suppressing unwanted environmental influences.
Keywords:
Microstrip
Sensor phenomena and characterization
Resonant frequency
Microfluidics
Liquids
Table lookup
Complementary split-ring resonator (CSRR)
dielectric property
differential measurement
liquid under test (LUT)
microfluidic channel
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