Improving Sensitivity of Noninvasive Blood Glucose Microwave Sensor Via Substrate Selection

Abstract This research paper presents a comprehensive overview of noninvasive blood glucose detection techniques and examines the differences between substrates used in various sensing methods. The study focuses on comparing the sensitivity of sensors based on two different substrates, Roger 4360G2 and Roger 4003C, in the context of glucose sensing. The results show that the substrate with Roger 4360G2, characterized by a dielectric constant (epsilon) of 6.15, exhibits a 3dB higher sensitivity compared to Roger 4003C, which has a dielectric constant (epsilon) of 3.38. This significant difference highlights the importance of substrate selection in achieving enhanced accuracy and precision for glucose sensing applications. Furthermore, the research investigates the impact of blood glucose levels on sensor measurements and compares them to a 25\% glucose concentration. By analyzing longitudinal measurements of individuals over time, the study reveals consistent blood glucose levels. These findings contribute to advancing glucose sensing technologies and improving the monitoring of blood glucose levels in individuals.