AWE在双负媒质宽频散射分析中的应用
doi: 10.3724/SP.J.1146.2010.00661
Application of AWE to Scattering Analysis of the Double-negative Medium over a Broad Frequency Band
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摘要: 该文旨在利用渐近波形估计(AWE)技术来研究双负媒质(DNG)的电磁散射特性。文章首先从双负媒质(DNG)的本构关系出发，推导出DNG的PMCHWT方程，从而解出单频率入射波下的电流和雷达散射截面(RCS)；通过对阻抗矩阵元素的处理，实现了阻抗元素高阶导数的求解，成功的将AWE技术应用于DNG宽频电磁计算领域。计算实例表明：AWE计算的结果能很好地逼近精确解，同时大大提高了计算效率。Abstract: In this paper, the Asymptotic Waveform Evaluation (AWE) technique is applied to study electromagnetic scattering analysis of Double-NeGative (DNG) medium. The PMCHWT equation of the DNG is deduced based on its constitutive relationship. And the surface currents and Radar Cross Section (RCS) at a single frequency point is computed; In order to achieve high-order derivation work, impedance matrix elements are managed. Then the AWE technique is applied to obtain broadband RCS frequency response of the DNG. A good agreement can be seen between AWE and the exact solution. The computational efficiency is improved significantly.
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Erdemli Y E, Gong J, and Reddy C J, et al.. Fast RCS pattern fill using AWE technique [J].IEEE Transaction on Antennas and Propagation.1998, 46(11):1752-1753[3]Veselago V G. The electrodynamics of substances with simultaneously negative values of and [J].Soviet Physics-Uspekhi.1968, 10(4):509-514[9]Karkkainen M K and Maslovski S I. Wave propagation, refraction, and focusing phenomena in Lorentzian double-negative materials:a theoretical and numerical study [J].Microwave and Optical Technology Letters.2003, 37(1):4-7 -
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