CAJ | 학술논문

研究了电大尺寸目标双站电磁散射的改进物理光学法。针对以往双站高频算法由于忽略阴影区电流影响，导致大双站角下计算误差有所增大的问题，提取电流步进法中的迭代算子，考虑阴影区不同面元的耦合影响，与图形电磁计算方法相结合，推导出了改进的物理光学公式。分别提取照明区和阴影区面元，按照入射波方向进行排序迭代求解，快速有效地计算了电大目标的双站雷达散射截面（RCS）。通过与多层快速多极子，以及高低频混合方法进行对比，验证了该方法的有效性和准确性。
연구료전대척촌목표쌍참전자산사적개진물리광학법。침대이왕쌍참고빈산법유우홀략음영구전류영향，도치대쌍참각하계산오차유소증대적문제，제취전류보진법중적질대산자，고필음영구불동면원적우합영향，여도형전자계산방법상결합，추도출료개진적물리광학공식。분별제취조명구화음영구면원，안조입사파방향진행배서질대구해，쾌속유효지계산료전대목표적쌍참뢰체산사절면（RCS）。통과여다층쾌속다겁자，이급고저빈혼합방법진행대비，험증료해방법적유효성화준학성。
The bistatic radar cross section （RCS） prediction with improved physical optics（PO） method for electrically large targets combined is presented in this paper. Since the previous high-frequency methods neglet the current impact of shadow zone and lead to the increasing errors of the large angle bistatic calculation, this method is deduced by introducing the current marching technique into the conventional physical optics method. Combined with graphical electromagnetic computing method that extracts the illuminated and shadow facet in accordance with the direction of the incident sort iteration, the bistatic RCS of a conductive target can be exactly calculated. Compared with multilevel fast multipole algorithm and the hybrid method, the numerical results show that this method is efficient and accurate.