| 强电磁脉冲信号激励下复杂目标的散射 |
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| 引用本文： | 李毅, 梁步阁, 张光甫, 等. 强电磁脉冲信号激励下复杂目标的散射[J]. 强激光与粒子束, 2006, 18(07). |
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| 作者姓名： | 李毅 梁步阁 张光甫 袁乃昌 |
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| 作者单位： | 1.国防科学技术大学 电子科学与工程学院,长沙 41 0073 |
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| 摘 要： | 用时域有限差分法仿真了某飞行器缩比模型及该模型涂敷雷达吸波材料的散射特性，得到了鼻锥方向、侧向和后向ns级脉冲激励下模型的时域响应和频域雷达散射截面；并在外场用ns级脉冲源进行了该金属模型的探测实验。仿真与外场实验结果均得到了模型的鼻锥方向回波幅度最小，侧向最大；鼻锥方向回波脉宽最宽，侧向最窄的结论。研究结果表明：外形隐身和材料隐身对ns或亚ns级窄脉冲的隐身效果不明显，ns或亚ns级窄脉冲能发现和识别隐身目标。
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| 关 键 词： | 脉冲 时域有限差分方法 外形隐身 材料隐身 雷达散射截面 |
Simulation and experiment for scattering of complex objects stimulated by powerful electromagnetic pulse |
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| li yi, liang bu-ge, zhang guang-fu, et al. Simulation and experiment for scattering of complex objects stimulated by powerful electromagnetic pulse[J]. High Power Laser and Particle Beams, 2006, 18. |
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| Authors: | li yi liang bu-ge zhang guang-fu yuan nai-chang |
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| Affiliation: | 1. College of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | The scattering characteristics of an airplane model and the radar absorbing material covered on the model are simulated by the finite-difference time-domain (FDTD) method, and the time-domain echoes and frequency-domain radar cross section echoes of the model from nose-angle, side-angle and back-angle stimulated by an ns pulse are obtained. The results of the simulation and outdoor experiment show that the echo amplitude of the nose-angle is the lowest and that of the side-angle is the highest. The pulse-width of the nose-angle echo is the widest and that of the side-angle is the narrowest. The shape-stealth and material-stealth are not effective for ns or sub-ns pulse signals. |
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| Keywords: | pulse finite-difference time-domain method shape-stealth material-stealth radar cross section |
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