Retro-Modelling Technique for Permittivity Measurements in the Range from 2.2 to 2.6 GHz for Medical Applications

In this study we present a permittivity measurement technique based on retro-modelling of a resonant cavity in the frequency range from 2.2 to 2.6 GHz that allows for a more arbitrary sample shape than traditional cavity perturbation techniques. It is shown that the resolution of the retro-modelling...

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Bibliographic Details
Main Authors: Salomon, C. J., Petrovic, N., Risman, P. O.
Format: Conference Proceeding
Language:English
Subjects:
ceramic
dielectric
measurement
Measurement uncertainty
Medical services
Microwave measurement
permittivity
Permittivity measurement
Perturbation methods
Resonant frequency
retro-modelling
Shape
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Summary:In this study we present a permittivity measurement technique based on retro-modelling of a resonant cavity in the frequency range from 2.2 to 2.6 GHz that allows for a more arbitrary sample shape than traditional cavity perturbation techniques. It is shown that the resolution of the retro-modelling technique can be improved if the invoked modes in the sample and in the surrounding cavity space are of different type or indexation, a condition that must clearly be avoided in classical perturbation techniques. The measurement method was applied to a ceramic sample of unknown permittivity which was retro-modelled to \varepsilon^{\prime}=19.35 and \sigma=0.009S/m with a remaining combined error of geometry and permittivity deviations between measurement and simulation of
ISSN:2643-6795
DOI:10.1109/CAMA49227.2021.9703643