PO+MEC计算目标近场电磁散射特性  

Computing Targets' Near-Field Electromagnetic Scattering Characteristics Using PO and MEC

作　　者：张京国[1] 金桂玉[1] 高宠[1] 

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《航空兵器》2015年第6期31-35,共5页Aero Weaponry

摘　　要：基于面元法思想,将目标表面近似为面元和棱边的组合,再用物理光学法(PO)、等效电磁流法(MEC)等高频近似解法分别计算面元散射场和边缘绕射场,经矢量叠加求得目标总体近场电磁散射特性。计算程序区分了凹凸棱边,并在比较了多种不同等效电磁流表达式之后,选择了一种既能很好地减少绕射场计算奇异点,又使计算结果更加符合实际情况的表达式。最后以某隐身飞机为例,计算了复杂目标近场RCS。The target could be represented as a combination of facets and edges based on faceting approach. Physical optics（ PO） method is adopted to calculate the facet＇s scattered field and the method of equivalent currents（ MEC） is used to calculate the edge diffraction. Taking facet contribution and edge diffraction into consideration,this paper gets the total scattering field by vector superposition. Besides,dihedral angle and raised edge are distinguished in the process. After comparing several different MEC expressions,an expression which can not only reduce the extreme point in edge diffraction calculation,but also make the results be more in line with the actual situation. At last,taking the stealth aircraft as an example,complex targets＇ near-field RCS are gotten.

关 键 词：雷达散射截面 物理光学法 等效电磁流法 

分 类 号：TN011[电子电信—物理电子学]