Determining dispersion characteristics of rectangular waveguide with narrow impedance walls

Authors

DOI:

https://doi.org/10.15587/1729-4061.2026.359146

Keywords:

propagation constant, boundary conditions, surface waves, dispersion characteristics, surface impedance, filters of harmonics

Abstract

This study explores a rectangular metal waveguide with narrow impedance walls, described by equivalent impedance-type boundary conditions. The task addressed is to build an effective mathematical model for analyzing waveguides with non-ideally conducting and irregular boundary surfaces, by determining their dispersion characteristics and wave propagation constants.

An approach based on the Fourier method and Leontovych impedance boundary conditions has been proposed. This has made it possible to avoid the complications associated with the vector statement of the problem and obtain transcendental equations for determining the propagation constants of bulk and surface waves. The dispersion equation was analytically solved and the eigenwave parameters were calculated in a wide range of surface impedance values.

The analytical results made it possible to verify correctness of the approach from a physical point of view; they could facilitate the optimization of parameters for the basic structure to the requirements of a specific microwave device. This is due to the use of an impedance boundary condition model, which adequately takes into account the influence of losses and reactive properties of the surface on electromagnetic fields and wave propagation processes in the waveguide.

In practice, the proposed approach could be used for the analysis and design of complex periodic microwave structures, in particular, filters, directional couplers, as well as power distribution elements between phased array antenna elements. Through the generalization of research results in the form of normalization of the impedance and spectral characteristics of the basic waveguide structure, the obtained characteristics could be used to design microwave devices in the range from decimeter to millimeter wavelengths

Author Biographies

Ludmila Logacheva, Zaporizhzhia Polytechnic National University

Department of Radio Engineering and Telecommunications

Tetiana Bugrova, Zaporizhzhia Polytechnic National University

PhD

Department of Radio Engineering and Telecommunications

Mikhail Chornoborodov, Zaporizhzhia Polytechnic National University

PhD

Department of Radio Engineering and Telecommunications

Sergii Morshchavka, Zaporizhzhia Polytechnic National University

PhD

Department of Radio Engineering and Telecommunications

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Determining dispersion characteristics of rectangular waveguide with narrow impedance walls

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Published

2026-04-30

How to Cite

Logacheva, L., Bugrova, T., Chornoborodov, M., Morshchavka, S., & Chornoborodova, N. (2026). Determining dispersion characteristics of rectangular waveguide with narrow impedance walls. Eastern-European Journal of Enterprise Technologies, 2(5 (140), 14–24. https://doi.org/10.15587/1729-4061.2026.359146

Issue

Vol. 2 No. 5 (140) (2026): Applied physics

Section

Applied physics

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Copyright (c) 2026 Ludmila Logacheva, Tetiana Bugrova, Mikhail Chornoborodov, Sergii Morshchavka, Natalia Chornoborodova

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