Ultrahigh-Sensitivity Microwave Microfluidic Sensors Based on Modified Complementary Electric-LC and Split-Ring Resonator Structures

Wu, Wang; Zhao, Wen‐Sheng; Wang, Dawei; Yuan, Bo

doi:10.1109/jsen.2021.3090086

Cited by 59 publications

(18 citation statements)

References 26 publications

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“…Although the sensor in Reference [49] has a smaller size than the others, it requires a relatively large amount of sample for testing. The sensors in References [50,51] offer the second and third largest average sensitivities. However, the measured notch depths in these sensors are very small (less than 1.5 dB in Reference [50] and less than 6 dB in Reference [51]).…”

Section: Comparison With Other Planar Sensorsmentioning

confidence: 99%

“…The sensors in References [50,51] offer the second and third largest average sensitivities. However, the measured notch depths in these sensors are very small (less than 1.5 dB in Reference [50] and less than 6 dB in Reference [51]). This means that such sensors are not appropriate for characterization of high loss samples.…”

Section: Comparison With Other Planar Sensorsmentioning

confidence: 99%

“…An interdigital capacitor as a capacitive gap in a split-ring resonator (SRR) is used to increase the fringing field and achieve a larger effective sensing area in Reference [49]. A similar approach was used in References [50,51] by using meandered slots in the CSRR and complementary electric-LC (CELC) resonators to achieve higher E-field concentration and better sensitivity. In Reference [52], a negative refractive index transmission line is used as a coupling structure to improve sensitivity in a SRR-based microfluidic sensor.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Extremely Sensitive Microwave Microfluidic Dielectric Sensor Using a Transmission Line Loaded with Shunt LC Resonators

Abdelwahab

Ebrahimi

Tovar-Lopez

et al. 2021

Sensors

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In this paper, a very high sensitivity microwave-based planar microfluidic sensor is presented. Sensitivity enhancement is achieved and described theoretically and experimentally by eliminating any extra parasitic capacitance not contributing to the sensing mechanism. The sensor consists of a microstrip transmission line loaded with a series connected shunt LC resonator. A microfluidic channel is attached to the area of the highest electric field concentration. The electric field distribution and, therefore, the resonance characteristics are modified by applying microfluidic dielectric samples to the sensing area. The sensor performance and working principle are described through a circuit model analysis. A device prototype is fabricated, and experimental measurements using water/ethanol and water/methanol solutions are presented for validation of the sensing mathematical model.

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Section: Comparison With Other Planar Sensorsmentioning

confidence: 99%

Section: Comparison With Other Planar Sensorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extremely Sensitive Microwave Microfluidic Dielectric Sensor Using a Transmission Line Loaded with Shunt LC Resonators

Abdelwahab

Ebrahimi

Tovar-Lopez

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…Microwave dielectric spectroscopy has advantages in detecting and identifying materials due to its real-time measurements, non-invasiveness, high sensitivity, and robustness [ 1 ]. Planar resonator-based microwave sensors have been applied in many testing and characterization scenarios, including displacement and rotation sensing [ 2 ], crack detection of metal and non-metal materials [ 3 ], medical settings [ 4 ], and dielectric constant measurements for solid dielectrics and liquid chemicals [ 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications

Wang

et al. 2022

Sensors

Self Cite

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This study proposes an ultrahigh-sensitivity split-ring resonator-based microwave sensor for retrieving the complex permittivity of liquid samples. An interdigital capacitor structure was used to expand the sensing area and the sensitivity. A defected ground structure and A parallel dual split-ring resonator were introduced to improve the quality factor. A polydimethylsiloxane microfluidic channel substrate was placed above the interdigital capacitor structure. The channel route coincided with the interdigital gap to fully utilize the strong electric field. Ethanol–water solutions with varying ethanol fractions were injected into the channel as the testing liquid. It was demonstrated that the variation in resonant frequency can be used to retrieve the dielectric properties of liquid samples. The proposed sensor used a small liquid volume of ~0.68 μL and provided values in good agreement with the reference data.

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“…This is due to the dramatic advancement in electronics from chips to system level as well as in the design of sensory elements. Moreover, design and development of sensors technology have played a major role in tackling a wide range of engineering and science problems, including medical diagnostics [1]- [2] and biosensing applications [3]- [5], defects in metallic objects, for example in aircraft fuselage [6]- [9] and structural materials [10]- [12], among others. Concrete blocks are considered artificial man-made stone type mass products and are very essential building units in engineering construction, for instance, buildings, bridges, and roads.…”

Section: Introductionmentioning

confidence: 99%

Detection of Reinforced Concrete Blocks Using Two-Port Microwave CSRR Sensor

2022

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In this paper, the design, fabrication and testing of a two-port transmission line-based microwave sensor for the detection of various structural concrete bricks is presented. The microwave sensor is based on the complementary split-ring resonators (CSRRs). First, three dimensional small-scale concrete building bricks are modeled in CST microwave studio along with the design of the microwave CSRR sensor. Classical controlled concrete blocks along with concrete mixed with wood are also studied. The detection capability is then evaluated both numerically and experimentally. Good agreement between numerical and measured results are achieved. Based on the obtained results, the microwave CSRR sensor was sensitive enough to detect various concrete/reinforced concrete blocks with achieved sensitivity of maximum resonance shift of 350 MHz for concrete blocks, while a shift of 150 MHz was obtained for the case of reinforced concrete blocks. From the findings of this research study, the developed microwave CSRR sensor is a good candidate for pre-screening of structural buildings and classification of reinforced concrete samples in a controlled laboratory environment.INDEX TERMS Concrete, CSRR, microwave sensor, reinforced concrete, structural engineering.

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Ultrahigh-Sensitivity Microwave Microfluidic Sensors Based on Modified Complementary Electric-LC and Split-Ring Resonator Structures

Cited by 59 publications

References 26 publications

Extremely Sensitive Microwave Microfluidic Dielectric Sensor Using a Transmission Line Loaded with Shunt LC Resonators

Extremely Sensitive Microwave Microfluidic Dielectric Sensor Using a Transmission Line Loaded with Shunt LC Resonators

An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications

Detection of Reinforced Concrete Blocks Using Two-Port Microwave CSRR Sensor

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