纳秒级脉冲照射下隐身飞行器的隐身效果分析

Analysis of Stealthy Effect for the Stealth Aircraft under ns Pulse Irradiation

为研究冲激雷达的反隐身潜力,首先用时域有限差分方法(FDTD)和解析方法计算了电磁波垂直入射时涂敷窄带雷达吸波材料(RAM)和涂敷等离子体的金属平板的反射率,然后用FDTD仿真了在纳秒级双高斯脉冲照射下某金属缩比隐身飞机模型,及其涂敷窄带RAM及涂敷等离子体的散射特性。结果表明,在低频区外形隐身的隐身效果不明显,RAM和等离子体的吸波效果较差。这证实了发射纳秒级脉冲信号的冲激雷达具有反隐身的潜力。

To study the anti-stealth ability of a pulse radar,firstly the reflectivities of a metal plate coated with a narrow-band radar absorbing material(RAM) and with the plasma,when an plane wave propagated in the normal direction of the plate,were calculated by the finite-difference time-domain(FDTD) method and the analytical method.Secondly the electromagnetic characteristics of one scale metal stealth airplane,the airplane coated with the narrow-band RAM and with the plasma,when incident wave was a double gaus...