Glucose sensing in saline solutions using V-band waveguides

We present results from an experimental system employed to study the impact of glucose content on measured transmission data. The measurements have been performed at frequencies between 50 GHz and 75 GHz using V-Band waveguides, and the measured samples consisted of saline solutions with glucose concentrations down to 0.025 wt%. The performed transmission measurements show that it is possible to establish an approximately linear relationship between the transmission coefficient and the glucose content in the samples. This linear dependence is also verified via simulations. The results are of interest for developing a miniaturized mobile glucose sensing system.