Publication

Abstract : Detection of the blood sugar concentration is vital in conditions related to diabetes. The changes in glucose concentration significantly affect the dielectric properties of blood, allowing the proposed device to identify distinct resonant frequencies corresponding to normal and diabetic ranges. This paper introduces a microstrip resonator-based band stop filter to determine the sugar concentration in blood. In the initial analysis, the resonator structure is optimised and validated. Then, the use of a resonator as a sensor is analysed using phantom of blood with varying sugar concentrations. The frequency shifts in the stop band are studied to understand the variation in glucose concentration in the phantom. The approach leverages the dependency of the resonant frequency on the dielectric constant of the material under test. Blood samples exhibit changes in its dielectric constant with varying glucose concentrations, leading to the resonant frequency of the device to shift correspondingly, creating distinct stop bands for different sugar levels. To ensure accuracy and repeatability, the measurements are carried out multiple times and the variation in resonance is found to be consistent. The proposed resonator structure ensures good sensitivity and selectivity by providing sharp resonance characteristics, allowing precise identification of frequency shifts.