Impedance Sensor for Fluid Permittivity Measurements up to 20 GHz with Single-Liquid Calibration

Publikationstyp
Conference Paper
Date Issued
2018-11-20
Sprache
English
Author(s)
Savic, Aleksandar 
Stepputtis, Alexander  
Jacob, Arne  
Institut
Hochfrequenztechnik E-3  
TORE-URI
http://hdl.handle.net/11420/2116
Start Page
227
End Page
230
Citation
European Microwave Conference (EuMC 2018)
Contribution to Conference
48th European Microwave Conference, EuMC 2018  
Publisher DOI
10.23919/EuMC.2018.8541415
Scopus ID
2-s2.0-85059806026
© 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.