Accurate microwave resonant method for complex permittivity measurements of liquids [biological]

A method available for accurate measurements of lossy liquids is presented, tested on standard materials, and compared with the perturbation technique commonly adopted in cavity measurements. The method is based on numerically solving a complex characteristic equation. Realization of the method was...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2000-11, Vol.48 (11), p.2159-2164
Main Authors: Yu, K.B., Ogourtsov, S.G., Belenky, V.G., Maslenikov, A.B., Omar, A.S.
Format: Article
Language:English
Subjects:
Biological materials
Equations
Liquids
Loss measurement
Materials testing
Measurement standards
Microwave theory and techniques
Permittivity measurement
Perturbation methods
Resonance
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Summary:A method available for accurate measurements of lossy liquids is presented, tested on standard materials, and compared with the perturbation technique commonly adopted in cavity measurements. The method is based on numerically solving a complex characteristic equation. Realization of the method was done using an E/sub 010/ cylindrical cavity. Results show that measurement errors may be decreased with application of the method presented. The method excludes uncertainties in complex permittivity determination when material has losses and high permittivity.
ISSN:0018-9480
1557-9670
DOI:10.1109/22.884209