锯齿台阶目标电磁散射特性研究

Analysis on the electromagnetic scattering characteristic of serrated steps

通过系列雷达散射截面(RCS)测试,研究分析了锯齿台阶电磁散射特性与其锯齿齿数、锯齿角度、相对于电磁波入射方向的俯仰角之间的变化关系,并将锯齿台阶散射结果与单直台阶进行比较,分析了各参数对锯齿台阶散射的影响。实验结果表明:对于相同齿数的锯齿台阶,当锯齿角度为适当钝角时,可得到较好的散射特性;对于同一锯齿台阶,随其相对于电磁波照射方向的俯角增大,在一定角度范围内其RCS呈下降趋势,散射特性得到改善。

The variable relationships between the electromagnetic scattering characteristics of serrated steps and the number, serrate angle or the pitch angle against incoming direction of wave were studied in a series of radar cross section （RCS） testing. The effects of these factors were analyzed by comparing these results to the testing results of straight step. It is shown that a rational obtuse angle is better for its scattering characteristic of same serrate tip number; referring to the same serrated step, the BCS is reduced, the scattering performance is improved according with decreasing of pitch angle in certain angle range.