Exact, closed-form field expressions for traveling-wave current filaments in homogeneous space
作者:
M.M. Mechaik,
S.L. Dvorak,
期刊:
Journal of Electromagnetic Waves and Applications
(Taylor Available online 1994)
卷期:
Volume 8,
issue 12
页码: 1563-1584
ISSN:0920-5071
年代: 1994
DOI:10.1163/156939394X00407
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Exact, closed-form field expressions are derived for the canonical problem of electromagnetic radiation by a semi-infinite traveling-wave current filament in free space. In order to avoid time consuming numerical integration, the fields are represented in terms of complementary incomplete Lipschitz-Hankel integrals, whose series expansions allow for accurate and efficient computation of the field components everywhere in space. The field expressions are also shown to reduce to elementary functions in many special cases, e.g., in the far-zone, in the vicinity of the current filament, and when the propagation constant along the wire is that of free space. Representative plots for the electric field components are presented for values of the propagation constant corresponding to both fast and slow-wave propagation. Since a superposition of two semi-infinite current filaments yields a finite-length current filament, the method and the results obtained in this paper can be readily applied to a number of problems in electromagnetics.
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