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arXiv 0812.2169physics.class-ph
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手征媒质中球面电磁波的正、逆散射问题

Direct and inverse scattering problems for spherical Electromagnetic waves in chiral media

Nikolaos Berketis, Christodoulos Athanasiadis

摘要:

研究了入射电磁场为时谐点生波,散射体为理想导体球时的手征媒质的正散射和逆散射问题。构造了散射问题的精确格林函数和电场远场图。对于一个小球体,在入射球面波的源处的散射波场的封闭形式的近似。这些近场结果导致反问题的解决方案。我们也处理相同的反问题,使用远场的结果,通过领先的阶项的散射截面的低频渐近展开。

英文摘要:

We study the direct and inverse scattering problems when the incident electromagnetic field is a time harmonic point- generated wave in a chiral medium and the scatterer is a perfectly conducting sphere. The exact Green s function and the electric far-field patterns of the scattering problem are constructed. For a small sphere, a closed-form approximation of the scattered wave field at the source of the incident spherical wave is obtained. These near-field results lead to the solution of an inverse problem. We also treat the same inverse problem using far-field results via the leading order term in the low-frequency asymptotic expansion of the scattering cross-section.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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