Complex permittivity extraction of blood glucose at microwave frequencies

Abstract

In this paper, coaxial sample holder design and its de-embedding and parameter extraction procedure is proposed. The s-parameters were measured up to 1GHz using network analyzer HP8753D and N-type connector, and the de-embedding of N-type connector was performed. We applied proposed de-embedding procedure to extract electrical parameter of blood glucose. As a result, permittivity of blood glucose is extracted. We also analyzed the errors of extracted parameters, which come from instrument error, geometrical error, and temperature variation. Using these error analyses, we reduce the error factor of extracted parameter. We extracted electrical parameters of glucose samples through these all extraction procedure and confirmed the possibility of glucose measurement system based on microwave system.