Hyper-sensitive microwave sensor based on split ring resonator (SRR) for glucose measurement in water

• Published in: Sensors and actuators. A. Physical. Vol. 321; p. 112601
• Main Authors: Zidane, Mohamed Amine, Rouane, Amar, Hamouda, Cherif, Amar, Hichem
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.04.2021; Elsevier BV; Elsevier
• Subjects: Configurations; Dielectric properties; Electromagnetic sensor; Engineering Sciences; Glucose; Measurement; Microwave circuit; Microwave sensors; Microwaves; Non-invasive measurement; Parameters; Resonators; Sensitivity analysis; Sensors; Split ring resonators; Studies; Microwave circuit; Electromagnetic sensor; Split ring resonators; Glucose; Non-invasive measurement
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/j.sna.2021.112601

[Display omitted] •Two cells of split ring resonators are used to improve the electromagnetic interaction between the sensor and water/Glucose.•Water/Glucose is simulated in Comsol using a realistic model.•Return loss is a useful parameter for determining glucose level in water for this sensor.•Electronic prototype is proposed to improve the sensitivity at an optimal frequency. A microwave sensor for glucose concentration measurement is presented. The proposed sensor is composed of two cells of circular split ring resonator (SRR) with a liquid holder put on both cells. Those resonators are coupled to a coplanar line forming a two-port network whose S-parameter response provide an information about the dielectric properties of the liquid that is under study. This paper presents a numerical simulation and experimental study of our new configuration of the resonators to assess the sensitivity of the sensor toward small change in glucose concentrations in water. An electronic prototype has been used to improve the detection; a resolution of 1.665 mmol/l is reached at the frequency 1.9 GHz. The obtained results have shown the effectiveness of this new configuration of resonators sensor for non-invasive measurement on the small change in dielectric parameter εr. Therefore, the proposed sensor is well fitted for real time measurement, non-destructive, precise, and low cost.