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Telecommunications and Radio Engineering
SJR: 0.203 SNIP: 0.44 CiteScore™: 1

ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v61.i1.20
pages 10-25

Numerical-Analytical Computation Method for Cutoff Wavenumbers of Waveguides with Complicated Cross-Section

N. G. Don
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
A. Ye. Poyedinchuk
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
Victor Ivanovich Tkachenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine

要約

The paper considers a new numerical-analytical technique for computing the cutoff wavenumbers of hollow regular waveguides having a continuous curvature of the cross-section contour or a curvature with a first kind singularity. The method is based on the boundary integral equations of the potential theory and a special parameterization of the cross-section contour. The details of the numerical implementation are illustrated by a circular waveguide and a rectangular one with rounded corners. The perturbation theory is employed to derive the analytical formulas for the cutoff wavenumbers of waveguides with piecewise linear boundaries and rounded corners. The application range of these formulas is determined.


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