Blood Glucose Sensor Design For Biomedical Application

A noninvasive blood glucose sensor has been presented in this study. The sensor is a rectangular-shaped Dielectric Resonator Antenna fed by a 50Ω microstrip feed line. The Rectangular DRA has a groove where a person’s thumb can be placed. As the concentration of glucose in blood changes, a variation in the dielectric properties of blood will follow. When a human thumb is placed on the antenna, due to the variation in dielectric properties of the blood, a deviation in the electromagnetic transmission of the antenna takes place causing a shift in the resonant frequency of the microwave sensor. The sensor has been designed and simulated using CST Microwave Studio and has a resonant frequency of 7.19GHz. Moreover, a thumb-like structure has been proposed to study the change in frequency for different glucose concentrations. The blood layer is created using the Cole-Cole model.