基于SBR的舰船目标多次散射RCS计算

摘要

The warship target has multiple scattering effect, the multiple scattering computation method for the warship targets has great influence on the radar cross section ( RCS) accurate prediction. In view of the warship target′s scattering feature, different simulation methodology had been discussed. The principle and application of the Shooting and Bouncing Ray( SBR) electromagnetic computing method was specific discussed and described in this paper. The three scattering radar cross section of warship targe was simulated by the method both of Shooting and Bouncing Ray and Physical Optics( PO) . By contrast with the radio cross section for all directional azimuth radio cross section, the typical angles were selected. By calculating the surface current results of the eligible typical angels, the hot-point results of the warship target were appeal to the inference that the Shooting and Bouncing Ray method having practical value for computation of multiple scattering RCS of warship targets simulation.%舰船目标存在多次散射效应,计算多次散射的方法与其雷达散射截面预估精确度密切相关。本文从舰船散射特点出发,分析不同散射特点的计算方法,详细分析射线追踪法( Shooting and Bouncing Ray,SBR)计算多次散射的原理,并分别采用射线追踪法与物理光学近视法( Physical Optics,PO)对假定舰船目标进行3次散射特性仿真计算,通过与典型角域表面电流定位的亮点部位进行对比,表明射线追踪法用于预估舰船目标多次散射上能够提高预估精度。