基于SBR方法的矩形腔体散射特性分析

本文从电大腔体散射出发，研究分析了射线弹跳法的原理及性质．基于对典型矩形腔体的几何特性及射线追踪特性的研究，推导了该类腔体入射口面与出射口面间的关系，得到了能够解析描述入射位置与出射位置的数学公式。在此基础上，通过对射线弹跳法的分析和简化，推导得到适用于电大矩形腔体的散射的计算公式，极大地提高了原有算法在此类问题上的计算效率。计算结果验证了该公式的有效性，也总结出了矩形腔体散射与入射角度之间的关系。

Analysis of scattering from rectangular cavity with SBR method

This paper studied the scattering from cavity. The mechanism and characterizes of Shooting and Bouncing Ray method is discussed. Based on the research of geometry of cavity and ray path in cavity, relation of incident location and exit location is deduced. Finally, a concise formula is got, which can reduce computation time and memory for the RCS analysis of large cavity. Simulation results shows the validity of method and the relationship between RCS of cavity and incident angle of radar wave.