Microwave-Based Technique for Measuring Glucose Levels in Aqueous Solutions

This study describes a non-invasive method for measuring the glucose level in aqueous solutions using a microwave-based system. The test sample (i.e., glucose-water solution) is subjected to a microwave signal. Two RF microstrip patch antennas manufactured using an FR-4 substrate and resonating at 5.7 GHz are used to create the suggested glucose sensor. The glucose-water solution is placed between the two antennas. An electronic conditioning circuit (i.e., analog readout circuit) is used to condition the received signal. A novel method to measure the amount of glucose is to observe the variation in the DC output voltage on the receiver side. Utilizing glucose-water testing samples, the technique is experimentally validated. For a concentration range of 0–5000 mg/dL, the experimental findings support the relationship between glucose concentration and the DC output voltage.