Doroshenko V. O.
Doctor of Physical and Mathematical Sciences, Professor, the Dean of Faculty of
Information and Analytical Technologies and Management, Kharkov National
University of Radio Electronics, Kharkov, Ukraine
Klimova N.P.
Cand. of Sc., Professor of the Department of Higher Mathematics, Kharkov
National University of Radio Electronics, Kharkov, Ukraine
SINGULAR INTEGRAL EQUATIONS IN MODEL BOUNDARY VALUE
PROBLEMS WITH CONICAL GEOMETRY
Introduction. Mathematical modeling plays an important role in the analysis of
various processes. Theoretical studying and development of mathematical models that
adequate to processes make possible not only to validate, but also often to predict
results of experimental investigations of these processes. Therefore development and
creation of mathematical approaches and methods of mathematical problems solution
for theoretical studying physics processes are topical. Interactions of electromagnetic
fields with objects of various nature can be described by Maxwell's equations [1,2].
Quite often mathematical modeling of problems of wave diffraction by structures is
reduced to problems of mathematical physics, which can be effectively solved by
applying methods of integral transforms and integral equations [3-5]. Researching
problems of wave diffraction by irregular shape bodies is of interest for practical
applications in acoustooptics, optical engineering, antenna and electronic engineering.
The research of model problems of electromagnetic waves excitation and diffraction
by surfaces with characteristic roughness is of interest not only for theoretical studying
of the considered physical process, but also for practical applications. So in case of
excitation of structures with inhomogeneous surface properties (e.g. with a variable
surface impedance) the surface waves, that are capable to transfer "useful" energy, can
appear on the surface of such structures. The presence of breaks, corner points, tips,
slots leads to arising of specific class of waves (gap, edge or scattered from the vertex),
that performs both positive mission, and give rather undesirable effect (e.g. energy
losses). Hence, it is necessary to consider the impact of such waves in designing of
devices and complexes. It is important both for ensuring electromagnetic compatibility
of operating systems [6] and protection of radio-engineering equipment service
personnel.
Literature review. Inhomogeneous and irregular structures that include
structures with characteristic angular and geometrical parameters (cones, bicones,
conical and plane angular sectors) occupy a special place among canonical surfaces.
Antennas which surfaces represent cones, bicones, conical and plane angular sectors
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