基于光束追踪的SBR方法中棱边绕射计算的改进

Improvements of Edge Diffraction Computing in SBR Method Based on Beam Tracing

基于光束追踪的SBR方法是一种改进的SBR方法,它是高频条件下计算复杂目标雷达散射截面RCS的有效方法之一。分析了基于改进SBR方法查找可见棱边的不足之处,并提出了改进措施;在棱边绕射计算中重点探讨了基于TW-ILDC的截断长度计算,找到了一种比较高效的计算方法。计算实例证明,探讨的这种方法确实修正了SBR方法的计算结果,提高了其计算的精度。

The SBR method based on beam tracing is an improved SBR which is one of the valuable methods for computing the radar cross section (RCS) of complex radar target in high frequency region. There are some shortages of detecting visible edges in the traditional method based on the improved SBR, and a new method is presented in this paper. Furthermore, one effective way to calculate truncated length which is needed in edge diffraction based on TW-ILDC is investigated detailedly and found finally in this paper. In the end, the RCS picture shows that our computing results are in close agreement with the data given by FEKO, so this new method correct practicably the PO results.