Determination of dielectric permeability of substances by electromagnetic waveguide method

Автор(и)

  • Vikt. V. Ovsyanikov Oles Honchar Dnipro National University, Dnipro, Ukraine
  • E. R. Beznosova Oles Honchar Dnipro National University, Dnipro, Ukraine
  • L. Z. Tsypko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • L. A. Filins’kyy Oles Honchar Dnipro National University, Dnipro, Ukraine
  • Vl. V. Ovsyanikov Dnipro University of Technology, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332014

Ключові слова:

dielectric constant of a substance, electromagnetic waveguide method, VSWR, specific heat of combustion, coal, solid state foam, liquid foam

Анотація

A method for determining the complex permittivity of substances by the electromagnetic (EM) waveguide method in the microwave range using electrodynamics and the theory of multilayer dielectric structures is considered. The expression for the complex reflection coefficient of an EM wave in a waveguide with a substance sample is studied. Calculations of the dielectric constant of substances are carried out by analytical and numerical methods using computers. To obtain the desired complex permittivity of a substance, we use the relationship between the expression for the reflection coefficient modulus and the value of the standing wave coefficient over voltage measured in advance in the frequency range. The method is suitable for automation and application in enterprises producing and using fuels, construction and agricultural products. From the found value of the dielectric constant, the quality of substances can be determined. For example, the results of determining the dielectric constant several coals and solid-state foam are given.

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Опубліковано

2020-09-10

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