Improvements of Edges Diffraction Computing in GRECO  

GRECO中棱边绕射场计算的改进(英文)

作　　者：秦德华 王宝发 刘铁军 

机构地区：[1]DepartmentofElectronicEngineering,BeijingUniversityofAeronauticsandAstronautics,Beijing100083,China

出　　处：《Chinese Journal of Aeronautics》2004年第2期93-98,共6页中国航空学报（英文版）

基　　金：FoundationofNationalKeyLaboratoryofElectromagneticEnvironmentalResearch ( 0 0 js67.1.1.hk0 10 1)

摘　　要：Graphical Electromagnetic Computing (GRECO) is one of the valuable methods for computing the radar cross section (RCS) of complex radar target in high frequency region. But there are some shortages of wedge detecting method in the original GRECO literature. A new method for collecting the edge pixels and wedge parameters is presented in this paper. An expression of edge diffraction field in the original GRECO literature is in error, the error-corrected formulas are derived by using method of equivalent edge currents (MEC) and physical theory of diffraction (PTD). Finally, the total RCS expression is given by physical optics (PO) and PTD method. The computing results are in close agreement with the measured data.Graphical Electromagnetic Computing (GRECO) is one of the valuable methods for computing the radar cross section (RCS) of complex radar target in high frequency region. But there are some shortages of wedge detecting method in the original GRECO literature. A new method for collecting the edge pixels and wedge parameters is presented in this paper. An expression of edge diffraction field in the original GRECO literature is in error, the error-corrected formulas are derived by using method of equivalent edge currents (MEC) and physical theory of diffraction (PTD). Finally, the total RCS expression is given by physical optics (PO) and PTD method. The computing results are in close agreement with the measured data.

关 键 词：electromagnetic wave scattering GRECO radar cross section edge diffraction 

分 类 号：V243[航空宇航科学与技术—飞行器设计]