| 波束入射时一维动态粗糙海面的电磁散射 |
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| 引用本文： | 郭立新,官秀国.波束入射时一维动态粗糙海面的电磁散射[J].科学技术与工程,2003,3(1):15-19. |
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| 作者姓名： | 郭立新 官秀国 |
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| 作者单位： | 西安电子科技大学理学院,西安,710071 |
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| 基金项目： | 国家自然科学基金(60101001)，国防科技预研基金(51403020401DZ0155)，高等学校优秀青年教师教学和科研奖励基金 |
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| 摘 要： | 基于粗糙面散射场积分方程，采用目前较为普遍的前、后向加速迭代法来求解具有Pierson-Moskowitz谱的动态导体粗糙海面的波束散射问题，数值计算后向散射截面的角分布，讨论了波束和平面波入射时动态海面在不同尺度、采样间隔及不同风速下的散射截面的变化，尤其对掠入射散射做了讨论，得到了平面波和波束入射时后向散射截面随掠入射角近四次方的变化关系。
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| 关 键 词： | 波束入射 一维动态粗糙海面 电磁散射 MonteCarlo模拟 散射截面 入射角 |
| 修稿时间： | 2002年10月8日 |
Electromagnetic Scattering from a One-dimensional Time-varying Sea Surface with Gaussian-like Beam Incidence |
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| GUO Lixin,GUAN Xiuguo School of Science,Xidian University,Xi''an.Electromagnetic Scattering from a One-dimensional Time-varying Sea Surface with Gaussian-like Beam Incidence[J].Science Technology and Engineering,2003,3(1):15-19. |
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| Authors: | GUO Lixin GUAN Xiuguo School of Science Xidian University Xi'an |
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| Institution: | GUO Lixin,GUAN Xiuguo School of Science,Xidian University,Xi'an 710071 |
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| Abstract: | The new widely used iterative method named forward-backwardmethod is given to calculate finite beam scattering from the conducting time-varying sea surface with Pierson-Moskowitz spectrum by solving the electricfield integral equation. Numerical results for the angular distributions of thebackscattering cross sections with different surface length, sample interval anddifferent velocity of the wind are discussed, respectively. Emphasis is put onwith the electromagnetic backscattering at low grazing angle incidence, it isshown that the backscattering cross section is proportional to the nearly fourthpower of the grazing angle for the plane and beam incidence. |
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| Keywords: | one-dimensional time-varying sea surfaces electromagnetic scattering beam incidence |
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