Publication

Abstract : Diabetes mellitus affects millions of people worldwide. At present, the technology used by diabetics for determining blood glucose concentration is invasive which requires a blood sample and is thus painful. Bloodless and painless technology to monitor blood glycaemic levels could improve the life of diabetes patients. This paper presents the design of microstrip sensor modeled in the form of microstrip antenna, which can be used for non invasive blood glucose monitoring. The approach followed is based on the notion that, variation in concentration of glucose in blood results in the variation in properties (dielectric) of blood which in turn results in the change in near field coupling and electromagnetic transmission of antenna. This will affect the input impedance of antenna and which in turn will affect its resonant frequency. This frequency shift can be used to observe the change in blood's permittivity and conductivity, which will be used to estimate the concentration of glucose in blood. The proposed electromagnetic sensor can be located close to the human skin at a fixed distance in order to avoid perspiration. The microstrip antennas with microstrip feed line and coaxial feed are initially designed using transmission line model and thereafter optimized and validated with simulations using CST microwave suite.