表面缝隙对透波材料RCS的影响分析

Analysis of Influence of Surface Gap on RCS of Wave-Transmitting Materials

将电磁场散射相干原理与矢量叠加原理相结合,从理论上分析了缝隙这类弱散射源对于透波材料雷达散射截面(RCS)的影响规律,并利用商业电磁软件FEKO进行数值仿真。研究结果表明:电磁波入射频率与极化方式的改变时,透波材料RCS受单缝隙的影响较小;存在多列平行缝隙时,透波载体的RCS受所有缝隙组合方式耦合效应的影响,且缝隙间距影响其波峰位置、缝隙长度影响其波峰幅值,等间距等长度的多列平行缝隙对目标载体RCS的影响最大。

Combining the principle of electromagnetic field scattering coherence with the principle of vector super-position,the influence of weak scattering sources such as gaps on radar cross section(RCS)of transparent materials is analyzed theoretically,and numerical simulation is carried out by using the commercial electromagnetic software FEKO.The results show that when the incident frequency and polarization mode of electromagnetic waves change,the RCS of wave-transparent materials is less affected by a single gap.When there are multiple rows of parallel slots,the RCS of the wave-transmitting carrier is affected by the coupling effect of all slot combinations,and the slot spacing affects its peak position and slot length affects its peak amplitude.Multiple rows of parallel slots with equal spacing and equal length have the greatest influence on the RCS of the target carrier.