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.

Automated summary

This study presents a non-invasive method using a microwave-based system to measure the glucose level in water solutions. The glucose sensor is created by placing the glucose-water solution between two RF microstrip patch antennas resonating at 5.7 GHz. A conditioning circuit is used to process the received signal and the variation in DC output voltage on the receiver side is observed to measure the glucose concentration. Experimental validation using glucose-water testing samples confirms the relationship between glucose concentration and DC output voltage within the range of 0-5000 mg/dL.