飞行器变尺度缝隙结构RCS计算分析

The RCS Analysis of the Variable-Dimension Gap on Aircraft

飞行器缝隙结构特征在其整机结构中的数量众多,会形成较弱的散射源,在雷达隐身探测时不可忽略.在不同极化方式下,对变尺度缝隙结构进行建模,并运用FEKO软件计算X波段时的雷达反射截面(RCS),分别与无缝金属平板和等宽度尺寸金属平板进行对比,计算结果证明变尺度缝隙结构的电磁散射强度随着其宽度尺寸的增大而增强,与缝隙的深度成正比.

There are a large number of gaps in the whole structure of the aircraft, which will form a weak scattering source. The model of variable-dimension gap structure is established. Under different polarization modes, we use FEKO to calculate the radar cross section （RCS） in X-band, compared with the metal plate with same width-dimension gap.The results show that the electromagnetic scattering intensity of the variable- dimension gap structure is enhanced with the increase of the width and the depth of the gap.