Physics of Wave Processes and Radio SystemsPhysics of Wave Processes and Radio Systems1810-31892782-294XPovolzhskiy State University of Telecommunications and Informatics1065310.18469/1810-3189.2022.25.3.43-57Research ArticleEquivalent circuit of a dielectric in a wide frequency range (0 Hz – 500 MHz)DmitrikovVladimir F.<p>Doctor of Technical Sciences, Professor of the Department of Theory of Electrical Circuits and Communication, the Bonch-Bruevich Saint Petersburg State University of Telecommunications, Honored Scientist of the Russian Federation, Laureate of the Gazprom Prize, Academician of the Russian Academy of Natural Sciences, Corresponding Member AEN, corresponding member MAN VSH, Member of the Bureau of the Council «Scientific Problems of Power Supply Systems» at the Department of the Russian Academy of Sciences «Electrophysics, Power Engineering, Electrical Engineering» </p>dmitrikov_vf@mail.ruShushpanovDmitry V.<p>Candidate of Technical Sciences, Associate Professor of the Department of Theory of Electrical Circuits and Communication</p>dimasf@inbox.ruThe Bonch-Bruevich Saint Petersburg State University of Telecommunications29092022253435729092022Copyright © 2022, Dmitrikov V.F., Shushpanov D.V.2022<p>Based on the measured impedance of the dielectrics an equivalent high frequency (0 Hz - 500 MHz) circuit model was built. The equivalent circuit model was built taking into account the physical processes occurring in the dielectric. The attempt explaining why the frequency characteristics (modulus and phase) of the dielectric complex impedance have such a character in a wide frequency band (up to 500 MHz) was made. It was shown that for constructing an equivalent circuit model (structure and parameters), measuring only the dielectric's resistance modulus is not enough. It is also necessary to measure the phase of the dielectric complex resistance, which is ignored in many works on the synthesis of an e dielectric equivalent circuit.</p>конденсатордиэлектриксхема замещениякомплексное сопротивлениекомплексная диэлектрическая проницаемостьcapacitordielectricequivalent circuitimpedancecomplex permittivity[Meleshin V.I. Transistor Converter Technology. Moscow: Tekhnosfera, 2005, 632 p. (In Russ.)][Dmitrikov V.F., Sergeev V.V., Samylin I.N. 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