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。
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 materialstealth are not effective for ns or sub-ns pulse signals.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2006年第7期1149-1153,共5页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
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
Pulse
Finite-difference time-domain method
Shape-stealth
Material-stealth
Radar cross section
