A capacitive microwave sensor with guard electrode for single cell characterization

Publikationstyp
Journal Article
Date Issued
2022-06-01
Sprache
English
Author(s)
Savić, Aleksandar 
Freiberger, Fabian  
Pörtner, Ralf  orcid-logo
Jacob, Arne  
Institut
Hochfrequenztechnik E-3  
Bioprozess- und Biosystemtechnik V-1  
TORE-URI
http://hdl.handle.net/11420/10938
Journal
IEEE journal of electromagnetics, RF and microwaves in medicine and biology  
Volume
6
Issue
2
Start Page
232
End Page
238
Citation
IEEE journal of electromagnetics, RF and microwaves in medicine and biology 6 (2): 232-238 (2022-06-01)
Publisher DOI
10.1109/JERM.2021.3078850
Scopus ID
2-s2.0-85105853553
Publisher
IEEE
A capacitive microwave sensor with homogeneous field distribution is presented. It relies on a high-impedance parallel-plate arrangement and a properly positioned guard electrode to mitigate fringing field effects. The distance between the capacitor plates can be as large as their diameter. Such an arrangement allows permittivity measurements of irregularly shaped objects like individual biological cells. This is demonstrated with a microchip sensor in a microfluidic setup. The calibration requires only a single reference fluid.
Subjects
Biology
Calibration
complex permittivity
Electrodes
Electromagnetics
fringing fields decoupling
Glass
guard electrodes
microwave sensors
Permittivity
Radio frequency
single biological cell characterization
DDC Class
600: Technik