Electromagnetic scattering and absorption by finite wires
作者:
P. C. Waterman,
J. C. Pedersen,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 78,
issue 2
页码: 656-667
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.360324
出版商: AIP
数据来源: AIP
摘要:
The scattering from a thin conducting wire is computed by representing the induced current as a sum of driven and resonant terms, the latter with complex propagation constantmkperturbed from its free space valuek. Using Galerkin’s method, the central problem of determiningmreduces to a minimization problem. For the limiting cases of highly conducting or highly absorbing wires simplifications are found. For short wires the Rayleigh cross sections are obtained; for longer wires with high absorption, accurate cross section formulas are constructed based on the unperturbed infinite wire currents. For general wire lengths and conductivities the method is computationally very simple and results are in excellent agreement with independent computations of both current and far field quantities, as well as experimental measurements. ©1995 American Institute of Physics.
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