| 二维密集导体目标散射的数值模式匹配法 |
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| 引用本文： | 叶红霞,金亚秋.二维密集导体目标散射的数值模式匹配法[J].电波科学学报,2010(2). |
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| 作者姓名： | 叶红霞 金亚秋 |
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| 作者单位： | 复旦大学波散射与遥感信息教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(No.40637033) |
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| 摘 要： | 用数值模式匹配法(Numerical Mode Match,NMM)求解空间随机分布的二维任意形状导体柱目标的复合散射。每个目标的散射场在各自局部坐标系中用柱面波函数展开,外部空间的散射场由所有目标散射场的叠加共同贡献。在每个导体目标表面选取若干离散点数值匹配边界条件,得到关于展开系数的超定矩阵方程,用奇异值分解(Singular Value Decomposition,SVD)或最小二乘法获得其最佳逼近解。这样,空间的散射场可由级数展开解析计算。数值分析了展开级数的截断问题,与矩量法(Method of Moment,MoM)数值计算的结果比较和误差分析获得不同形状和不同尺寸目标的展开项数,并用多项式拟合了简单的函数式。最后,针对不同形状组合的多导体柱复合散射模型分析其双站散射计算,与MoM方法的结果比较表明:数值模式匹配法能快速准确地分析任意尺寸任意位置任意形状复合目标的散射计算。
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| 关 键 词： | 柱面波展开 边界条件 奇异值分解 |
Numerical mode match method for scattering computation of densely distributed 2D PEC targets |
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| YE Hong-xia JIN Ya-qiu,Fudan University,Shanghai ,China.Numerical mode match method for scattering computation of densely distributed 2D PEC targets[J].Chinese Journal of Radio Science,2010(2). |
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| Authors: | YE Hong-xia JIN Ya-qiu Fudan University Shanghai China |
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| Affiliation: | YE Hong-xia JIN Ya-qiu(Key Laboratory of Wave Scattering and Remote Sensing Information(MOE),Fudan University,Shanghai 200433,China) |
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| Abstract: | Numerical mode match method(NMM) for cylindrical wave function expansion is developed for fast computation of electromagnetic scattering from a composite model of 2D conductive targets with random positions,sizes and shapes.Firstly,the scattering field of each target is expanded in the series summation of Hankel functions in its local coordinate.The total scattering field in outside space is contributed by all targets including their interactions,and the field inside each target is zero.Finite sampling poin... |
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| Keywords: | cylindrical wave expansion boundary conduction singular value decomposition |
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