Publisher DOI: 10.23919/EuMC.2018.8541415
Title: Impedance Sensor for Fluid Permittivity Measurements up to 20 GHz with Single-Liquid Calibration
Language: English
Authors: Savic, Aleksandar 
Stepputtis, Alexander 
Jacob, Arne 
Issue Date: 20-Nov-2018
Source: 2018 48th European Microwave Conference, EuMC 2018 (): 227-230 (2018-11-20)
Journal or Series Name: 2018 48th European Microwave Conference, EuMC 2018 
Abstract (english): © 2018 European Microwave Association. This paper proposes a novel impedance sensor for permittivity measurements of fluids. The sensing part is electrically small and can thus be represented by a simple equivalent circuit model up to 20 GHz. This is a benefit of the impedance measurement approach for permittivity extraction. A two-step calibration procedure, consisting of a simple Thru-Reflect-Line (TRL) and a single-liquid calibration is applied here. Both simulation and experiments on a printed circuit board realization are carried out. They verify the concept and demonstrate its robustness against production tolerances. Further improvements for enhanced accuracy and widened frequency range are suggested. The miniaturization potential is investigated in simulation.
ISBN: 978-287487051-4
Institute: Hochfrequenztechnik E-3 
Type: InProceedings (Aufsatz / Paper einer Konferenz etc.)
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