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电信和无线电工程
SJR: 0.203 SNIP: 0.44 CiteScore™: 1

ISSN 打印: 0040-2508
ISSN 在线: 1943-6009

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电信和无线电工程

DOI: 10.1615/TelecomRadEng.v71.i12.60
pages 1125-1140

MEASUREMENT OF COMPLEX PERMITTIVITY OF LIQUIDS USING OPEN-ENDED COAXIAL-LINE AND METAMATERIAL SUBSTRATE

V. K. Ivanov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
A. O. Silin
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
O. M. Stadnyk
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura Str., Kharkiv 61085, Ukraine

ABSTRACT

The authors suggest a modified technique, based on using metamaterial substrates with known characteristics, which enables one to employ coaxial probes for determining the complex dielectric permittivity of liquids. As it is proven below, by a certain relations between the electric parameters and the thickness of the medium layer to be tested and that of the substrate, there is a resonance decrease of reflections from the probe end, loaded on such a double-layered structure. Knowing this relation, one can determine the complex dielectric permittivity of the tested medium in a wide variation range, using only the measurements of the probe reflection factor amplitudes in a limited frequency range and matching the optimal layer thickness of the medium under investigation.


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