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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimer: 0040-2508
ISSN En ligne: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v75.i3.50
pages 235-245

RADIATION Q-FACTOR OF DIFFERENTSHAPE DIELECTRIC RESONATORS WITH TESTED CONDUCTORS AND LIQUID DIELECTRICS

A. A. Barannik
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
S. A. Vitusevich
Peter Grünberg Institute Forschungszentrum Juelich, Juelich, Germany
I. А. Protsenko
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
М. S. Kharchenko
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Nikolay T. Cherpak
O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine

RÉSUMÉ

Whispering gallery mode dielectric resonators are used as measuring cells to determine the electrophysical characteristics of materials. It is necessary to choose the resonator structure possessing acceptable radiation Q-factor values. Calculation of the radiation Q-factor by analytical methods is possible for simple symmetric structures only. Numerical investigations of different-shape leucosapphire resonators with limiting conducting end plates and without them are carried out in the Ka-band. The disk resonators with one conducting end plate are studied experimentally as well. The effect of tested material sample introduction in the electromagnetic field on the resonator field distribution, frequency and radiation Q-factor is shown. The application opportunity of measurement cells based on such resonators for determination of the (super)conductor microwave impedance and permittivity of dielectric liquids is analyzed. The results obtained can be used for choosing the resonator measurement cell with a negligible radiation loss.


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