ArticleSensors (Basel, Switzerland)2018
A High-Sensitivity Microfluidic Sensor Based on a Substrate Integrated Waveguide Re-Entrant Cavity for Complex Permittivity Measurement of Liquids.
Article in Sensors (Basel, Switzerland), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed.
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- Microfluidic self-quadruplexing SIW antenna with independent tuning and simultaneous sensing of liquid materials.Scientific reports · 2025Article
- Microstrip Patch Sensor for Characterizing Saline Solution Based on Complimentary Split-Ring Resonators (SC-SRRs).Sensors (Basel, Switzerland) · 2025Article
- Measuring Sedimentation Profiles for Nanoparticle Characterization through a Square Spiral Resonator Sensor.Sensors (Basel, Switzerland) · 2024Article
- Textile Antenna Sensor in SIW Technology for Liquid Characterization.Sensors (Basel, Switzerland) · 2023Article
- A Microstrip Transmission Line Biosensor to Measure the Interaction between Microliter Aqueous Solutions and 1.0-17.0 GHz Radio Frequencies.Sensors (Basel, Switzerland) · 2023Article
- Realizing the High Q-Factor of a CSIW Microwave Resonator Based on an MDGS for Semisolid Material Characterization.Micromachines · 2023Article
- Relative Permittivity Measurement of Microliter Volume Liquid Samples through Microwave Filters.Sensors (Basel, Switzerland) · 2023Article
- Measurement of Complex Permittivity for Rapid Detection of Liquid Concentration Using a Reusable Octagon-Shaped Resonator Sensor.Micromachines · 2023Article
- Comparison of the Moist Material Relative Permittivity Readouts Using the Non-Invasive Reflectometric Sensors and Microwave Antenna.Sensors (Basel, Switzerland) · 2022Article
- Differential Microstrip Sensor for Complex Permittivity Characterization of Organic Fluid Mixtures.Sensors (Basel, Switzerland) · 2021Article
- Microwave Spoof Surface Plasmon Polariton-Based Sensor for Ultrasensitive Detection of Liquid Analyte Dielectric Constant.Sensors (Basel, Switzerland) · 2021Article
- Microwave Sensors forSensors (Basel, Switzerland) · 2021Article
- Wireless Microfluidic Sensor for Metal Ion Detection in Water.ACS omega · 2021Article
- Review of Recent Microwave Planar Resonator-Based Sensors: Techniques of Complex Permittivity Extraction, Applications, Open Challenges and Future Research Directions.Sensors (Basel, Switzerland) · 2021Review
- Recent Advances in the Fabrication and Application of Graphene Microfluidic Sensors.Micromachines · 2020Review
- Modified Split Ring Resonators Sensor for Accurate Complex Permittivity Measurements of Solid Dielectrics.Sensors (Basel, Switzerland) · 2020Article
- Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement.Sensors (Basel, Switzerland) · 2020Article
- Microwave Sensors Based on Resonant Elements.Sensors (Basel, Switzerland) · 2020Article
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Authors and funding
7 authors.
Funding
Abstract
In this study, a novel non-invasive and contactless microwave sensor using a square substrate integrated waveguide (SIW) re-entrant cavity is proposed for complex permittivity measurement of chemical solutions. The working principle of this sensor is based on cavity perturbation technique, in which the resonant properties of cavity are utilized as signatures to extract the dielectric information of liquid under test (LUT). A winding microfluidic channel is designed and embedded in the gap region of the cavity to obtain a strong interaction between the induced electric field and LUT, thus achieving a high sensitivity. Also, a mathematical predictive model which quantitatively associates the resonant properties of the sensor with the dielectric constant of LUT is developed through numerical analysis. Using this predictive model, quick and accurate extraction of the complex permittivity of LUT can be easily realized. The performance of this sensor is then experimentally validated by four pure chemicals (hexane, ethyl acetate, DMSO and water) together with a set of acetone/water mixtures in various concentrations. Experimental results demonstrate that the designed sensor is capable of characterizing the complex permittivities of various liquids with an accuracy of higher than 96.76% (compared with the theoretical values obtained by Debye relaxation equations), and it is also available for quantifying the concentration ratio of a given binary mixture.
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