Abstract

This paper presents the design and characterization of a microwave biosensor based on a circular tapped split ring resonator (CT-SRR) coupled with a coplanar waveguide (CPW) transmission line to determine glucose concentration. An aqueous glucose solution was characterized for a concentration ranging from 0 to 0.20 g/mL with steps of 0.04 g/mL in the frequency range from 1.5 to 2.5 GHz. The notch amplitude transmission coefficient S 21 values with a variation in the glucose concentration were detected and recorded. The transmission coefficient spectra, linearity and sensitivity of the sensor were analyzed. The results show that the CT-SRR coupled with a CPW transmission line is a good approach for glucose concentration monitoring.

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