摘要
分析了复杂目标高频散射雷达截面(RCS)计算理论,提出了一种有效的混合算法。改进了等效电磁流方法(IMEC),推导了几何光学/物理光学区域投影算法(GO/PO)。IMEC能有效地消除反射边界和阴影边界的奇异性,GO/PO法用于计算多重散射。通过AutoCAD软件,使用三角面元法构建目标三维模型。目标的高频雷达散射截面通过几何光学、物理光学、改进的等效电磁流和几何光学/物理光学区域投影等混合方法计算获得。同时,计算了某型号导弹的RCS,理论值同测量结果基本一致,说明该方法能满足复杂目标电磁散射分析的需要。
An efficient hybrid method （HM） for computing the high-frequency radar cross section （RCS） of complex radar targets is presented. An improved method of equivalent currents （IMEC） and an area projection/physical optics method （AP/ PO） are derived. The IMEC can effectively eliminate the infinities on the shadow and reflection boundaries. The AP/PO is used for the computation of multiple scattering. Targets are modeled with AutoCAD employing triangular facets. The highfrequency RCS is obtained by using the method geometrical optics （GO）, physical optics （PO）, the IMEC and the AP/PO （GO＋ PO＋ IMEC＋ AP/PO）. Furthermore, the monostatic RCS calculated of some type missile is compared with measured data. The results show that this hybrid method is efficient and can satisfy the analysis need for the electromagnetic scattering from complex radar targets.
出处
《电波科学学报》
EI
CSCD
北大核心
2007年第5期884-890,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金项目(60272022)
