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本文用随机分布的有限长多层介质圆柱模拟树干层 ,用互易原理得到了位于粗糙地面上有限长多层介质圆柱与球目标的二阶散射场近似解析表达式 .在L、C、X波段下 ,研究了位于此环境中金属球目标与周围树干相互作用的电磁散射 ,计算结果表明 ,在低频段时树干对目标影响大 ,低频段可以穿透植被层并应用于目标探测和识别 .
In this paper, a stochastic distribution of a finite length multi-layered media cylindrical simulation tree trunk layer, using the reciprocity principle to obtain the approximate analytical expression of second-order scattering field of a finite length multi-layer dielectric cylinder and a ball target on a rough surface.L, C, X In the band, the electromagnetic scattering interaction between the metal ball target and the surrounding tree trunk in this environment was studied. The results show that the tree trunk has a great influence on the target in the low frequency band, and the low frequency band can penetrate the vegetation layer and be used for target detection and recognition.