Journal of Radio Electronics. eISSN 1684-1719. 2025. ¹3
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2025.3.9
ENERGY LOSSES IN PASSIVE ELEMENTS
WITH COMPLEX DIELECTRIC PERMITTIVITY
G.F. Zargano1, T.S. Kharlanova2, A.V. Kharlanov2
1Southern federal university
344090, Russia, Rostov-on-Don, Zorge str., 52Volgograd state technical university
400005, Russia, Volgograd, Lenin ave., 28
The paper was received May 30, 2024.
Abstract. Electromagnetic energy losses in open waveguides and resonators are considered. Heating temperatures of passive elements depending on their thermophysical parameters are calculated. The electromagnetic energy absorbed by the material of a cylindrical open waveguide leads to its heating. In steady-state mode, the temperature does not change due to the heat flow through the side surface of the waveguide. The temperature of the waveguide predominantly drops as the wave passes, but for a certain thermophysical parameters, the maximum heating occurs not at the beginning of the waveguide. At intensities of the order of milliwatts per square centimeter, the temperature does not rise above 1 K. Considering the thermal heating of the resonator, the effective quality factor associated with the imaginary component of the relative dielectric permittivity of the medium is calculated. As this permittivity increases, the heating temperature also increases. The linear character of the dependence of the temperature of open waveguides and resonators on the intensity of the electromagnetic wave is shown. Materials of the article can be of practical use in radiophysical and biomedical researches.
Key words: open waveguide, open resonator, heating, effective quality factor, electromagnetic oscillations.
Corresponding author: Kharlanov Aleksandr Vladimirovich, harlanov_av@mail.ru
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For citation:
Zargano G.F., Kharlanova T.S., Kharlanov A.V. Energy losses in passive elements with complex dielectric permittivity. // Journal of Radio Electronics. – 2025. – ¹ 3. https://doi.org/10.30898/1684-1719.2025.3.9 (In Russian)