Design of OCSRR-Based Differential Microwave Sensor for Microfluidic Applications

In this article, a high-sensitivity differential microwave sensor based on open comprehensive split-ring resonator (OCSRR) is proposed to extract the complex dielectric constant of liquid samples. An OCSRR structure is etched on the metal plate attached to the upper layer of the substrate. In additi...

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Published inIEEE sensors journal Vol. 22; no. 22; pp. 21489 - 21497
Main Authors Yu, Jianyuan, Liu, Guohua, Cheng, Zhiqun, Song, Yu, You, Minghui
Format Journal Article
LanguageEnglish
Published New York IEEE 15.11.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Differential measurement
Electric fields
Ethanol
high sensitivity
Liquids
Metal plates
Metals
microfluidic sensor
Microfluidics
Microwave sensors
open complementary split-ring resonator (OCSRR)
Optimization
Polydimethylsiloxane
Reflectance
Resonant frequency
Sensitivity
Sensors
Substrates
Table lookup
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Abstract In this article, a high-sensitivity differential microwave sensor based on open comprehensive split-ring resonator (OCSRR) is proposed to extract the complex dielectric constant of liquid samples. An OCSRR structure is etched on the metal plate attached to the upper layer of the substrate. In addition, the outer ring of OCSRR adopts a hexagonal structure to reduce the original capacitance of OCSRR, and the inner ring of OCSRR adopts a rectangular structure to facilitate optimization and obtain the highest electric field intensity. The polydimethylsiloxane (PDMS) microfluidic channel is placed on the side of the outer ring with high electric field intensity and injects different concentrations of water-ethanol mixture. During resonance, the electric field is concentrated along the slit where the microfluidic channel is located. When the liquid sample is injected, the corresponding reflection coefficient changes. The designed sensor is fabricated and tested, and the experimental results are in good agreement with the simulation results. Compared with the previous similar sensors, the sensor can suppress the influence of environmental factors and has an average high sensitivity of 0.88%.
AbstractList In this article, a high-sensitivity differential microwave sensor based on open comprehensive split-ring resonator (OCSRR) is proposed to extract the complex dielectric constant of liquid samples. An OCSRR structure is etched on the metal plate attached to the upper layer of the substrate. In addition, the outer ring of OCSRR adopts a hexagonal structure to reduce the original capacitance of OCSRR, and the inner ring of OCSRR adopts a rectangular structure to facilitate optimization and obtain the highest electric field intensity. The polydimethylsiloxane (PDMS) microfluidic channel is placed on the side of the outer ring with high electric field intensity and injects different concentrations of water-ethanol mixture. During resonance, the electric field is concentrated along the slit where the microfluidic channel is located. When the liquid sample is injected, the corresponding reflection coefficient changes. The designed sensor is fabricated and tested, and the experimental results are in good agreement with the simulation results. Compared with the previous similar sensors, the sensor can suppress the influence of environmental factors and has an average high sensitivity of 0.88%.
Author Yu, Jianyuan
You, Minghui
Liu, Guohua
Cheng, Zhiqun
Song, Yu
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SubjectTerms Differential measurement
Electric fields
Ethanol
high sensitivity
Liquids
Metal plates
Metals
microfluidic sensor
Microfluidics
Microwave sensors
open complementary split-ring resonator (OCSRR)
Optimization
Polydimethylsiloxane
Reflectance
Resonant frequency
Sensitivity
Sensors
Substrates
Table lookup
Title Design of OCSRR-Based Differential Microwave Sensor for Microfluidic Applications
URI https://ieeexplore.ieee.org/document/9915320
https://www.proquest.com/docview/2735384235
Volume 22
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