Split Ring Resonator-Based Microwave Fluidic Sensors for Electrolyte Concentration Measurements
By Paris Vélez, Jonathan Muñoz-Enano, Katia Grenier, Javier Mata-Contreras, David Dubuc, Ferran Martín. IEEE Sensors Journal, 2019
191 citations recorded by the source corpus.
A differential microwave sensor, based on a pair of uncoupled microstrip lines each one loaded with a split ring resonator (SRR), is applied to the measurement of electrolyte concentration in deionized (DI) water. For that purpose, fluidic channels are added on top of the SRR gaps, the most sensitive parts of the structure. The operating principle is based on the measurement of the cross-mode insertion loss, highly sensitive to small asymmetries caused by differences between the reference liquid and the liquid under test (LUT). In this paper, the reference liquid is pure DI water (the solvent), whereas the solution, DI water with electrolyte content, is injected to the LUT channel. The proposed sensor is able to detect electrolyte concentrations as small as 0.25 g/L, with maximum sensitivity of 0.033 (g/L)–1. The sensor is validated by measuring the concentration of three types of electrolytes, i.e., NaCl, KCl, and CaCl2. Finally, the sensor is applied to monitor variations of total electrolyte concentration in urine samples.
Subfields: Biomedical Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/bed81e88d8f849d28804dc9102a3cc30f7157140
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Citations in the corpus
- A Low-Cost Multiple Complementary Split-Ring Resonator-Based Microwave Sensor for Contactless Dielectric Characterization of Liquids (2020, background): “Many other researches also used polymer-based microfluidic channels [24]–[29], however, the fabrication of such microfluidic channels onto the substrate required a dedicated chemical procedure including, good texture molds, reagents and controlled environment to avoid bubble trapping and channel deg”
- Differential Microwave Microfluidic Sensor Based on Microstrip Complementary Split-Ring Resonator (MCSRR) Structure (2020, methodology): “However, the proposed sensor in [23] requires four ports, which increases the fabrication and measurement cost and makes it inconvenience of using.”