G.P. Zhabko1, E.A. Popov2, A.G. Sidnev3, A.S. Cherepanov4

1-4 Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia)

1 g_zhabko@mail.ru; 2 popov@spbstu.ru; 3 alex2922@gmail.com; 4 ascherspb@mail.ru

Formulation of the problem. The processes of propagation of electromagnetic waves in conventional waveguide systems have been studied quite well. The literature provides attenuation coefficients and wave numbers for high-frequency signals. However, these parameters are approximate and lead to errors when used over a wide frequency range. In particular, their application to pulsed signals gives solutions that violate the principle of causality. Therefore, a more rigorous approach is needed. Here this approach is based on the study of the dispersion equation. In addition, the work considers a coaxial waveguide different from the standard one with an additional layer on the wall.

Target. Find a rigorous solution to the problem of propagation of pulsed signals in a coaxial waveguide with losses in the presence of additional layers.

Results. A dispersion equation describing electromagnetic waves in a waveguide is derived. Its solution made it possible to obtain accurate values of propagation and attenuation constants over a wide frequency range. The processes of propagation of current waves in vibrator antennas with a dielectric shell placed in an absorbing medium are also considered.

Practical significance. The presented results confirm the possibility of practical use of level gauges to determine the depth of oil in two-pipe well systems.

Zhabko G.P., Popov E.A., Sidnev A.G., Cherepanov A.S. Propagation of pulsed signals in a lossy waveguide line. Radiotekhnika. 2024. V. 88. № 3. P. 42−47. DOI: https://doi.org/10.18127/j00338486-202403-05 (In Russian)

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