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Peter, Ronny ; Fischerauer, Gerhard:
Measurement of Axially Inhomogeneous Permittivity Distributions in Resonant Microwave Cavities.
In: IEEE Transactions on Microwave Theory and Techniques.
Bd. 67
(2019)
Heft 6
.
- S. 2433-2442.
ISSN 0018-9480
DOI: https://doi.org/10.1109/TMTT.2019.2910177
Abstract
The cavity perturbation method is a standard technique for material parameter estimation. It typically assumes that the sample consisting of the material under test (MUT) is small. This and other assumptions are violated in in-process measurement scenarios which involve big and inhomogeneous samples. We analyze the limitations of the classical perturbation method and present a new approach towards the measurement of spatially varying material parameters associated with a large sample in a rectangular or a circular cylindrical microwave cavity. The method is based on the measurement of multiple resonance frequencies and quality factors and is validated by numerical and laboratory experiments. It is demonstrated that relative permittivities and conductivities may be measured with typical accuracies on the order 1 %.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Cavity resonator; complex permittivity; inhomogeneous loading; inverse problem; perturbation method; Q-factor; resonance frequency |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 06 Jun 2019 06:24 |
| Letzte Änderung: | 13 Sep 2022 12:45 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/48498 |