CAJ | 학술논문

利用物理光学法(PO)与有限元法(FEM)混合方法,研究了有各向异性媒质局部涂覆的电大导体目标的电磁散射问题.在有复杂媒质涂覆的电小结构区域采用有限元法,在未涂覆媒质的电大导体区域采用物理光学法结合等效电磁流法.将两部分区域的边界进行消隐处理,考虑耦合效应,并利用共同的等相位面,将不同区域产生的散射场矢量叠加得到总散射场.文中的实例结果与传统的FEM很好的一致,说明了该方法的有效性和精确性.
이용물리광학법(PO)여유한원법(FEM)혼합방법,연구료유각향이성매질국부도복적전대도체목표적전자산사문제.재유복잡매질도복적전소결구구역채용유한원법,재미도복매질적전대도체구역채용물리광학법결합등효전자류법.장량부분구역적변계진행소은처리,고필우합효응,병이용공동적등상위면,장불동구역산생적산사장시량첩가득도총산사장.문중적실례결과여전통적FEM흔호적일치,설명료해방법적유효성화정학성.
The scattering by electrically large conducting targets with partially-coa-ted anisotropic medium is studied by the hybrid method of finite elements method (FEM)and physical optics(PO)method.FEM is applied in the region which is coated with complicated medium,while PO and equivalent edge currents method are used for those of electrically large conducting target.Considering the coupling of two regions,the shadow regions of the boundary surface are eliminated.The common constant phase front of scattered fields from two regions is chosen to unify their Dhases.Therefore,the vector scattered fields can be superposed to calculate the RCS of the target.The numerical results show that this method is efficient and accurate.