Numerical analysis of near electromagnetic fields of a parabolic cylinder and a paraboloid of revolution

Autor: Yu. V. Pimenov, G. M. Tikhonov, E. V. Zakharov, A. G. Davydov
Rok vydání: 1991
Předmět:
Zdroj: Computational Mathematics and Modeling. 2:79-84
ISSN: 1573-837X
1046-283X
DOI: 10.1007/bf01128362
Popis: Diffraction of electromagnetic waves on open parabolic surfaces is of considerable importance for a number of physicotechnical applications. Such surfaces are often used as focusing elements or for wavefront transformation. For example, modern antenna engineering places stringent requirements on the electrodynamic characteristics of reflector antennas, which in turn demands more accurate solution of the corresponding diffraction problems. There is an acute need for reference calculations of the field structure radiated by standard reflector antennas, in particular antennas with parabolic reflectors. These results are needed for more accurate determination of the electrodynamic characteristics of such antennas and also ~or elucidating the possibilities and limits of application of various methods of reflector antenna analysis. In this paper, we present the results of numerical analysis of the diffraction of electromagnetic waves on a cylindrical surface with a finite parabolic directrix (the plane problem) and on a surface of revolution with a finite parabolic generator. The analysis is conducted by the method of integrodifferential equations, which was developed in [!-7] for numerical solution of electromagnetic wave diffraction problems on ideally conducting open surfaces. It ensures high accuracy of the calculated electromagnetic fields and may be applied for the analysis of reference models. The corresponding diffraction problems are formulated, the numerical solution procedure is briefly described, and some numerical results are reported.
Databáze: OpenAIRE
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