Microwave Sensor for Precise Permittivity Characterization of Liquids Used for Aqueous Glucose Detection in Medical Applications

Conference: GeMiC 2014 - German Microwave Conference
03/10/2014 - 03/12/2014 at Aachen, Germany

Proceedings: ITG-Fb. 246: GeMiC 2014

Pages: 2Language: englishTyp: PDF

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Authors:
Schwerthoeffer, U.; Weigel, R.; Kissinger, D. (Institute for Electronics Engineering, University of Erlangen-Nuremberg, Cauerstr. 9, 91058 Erlangen, Germany)

Abstract:
In this paper, a highly sensitive sensor for precise permittivity change detection of liquids is presented. The sensor is based on a planar half-wavelength (λ/2) microstrip line (MSL) resonator with a microfluidic container placed on top. The interaction between the electric field and the milliliter range water-glucose solutions under test can be observed measuring the shift of the resonant frequencies at about 2 GHz. Using the proposed near-field sensor, a very sensitive concentration of less than 0.01% of the relative amount content of glucose in water can be detected.