一种快速计算目标宽带雷达截面的电磁算法  

Fast computation of the wide-band radar cross section of arbitrary objects

作　　者：马骥[1] 龚书喜[1] 王兴[1] 赵维江[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2012年第4期98-102,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61072020)

摘　　要：将自适应积分方法与最佳一致逼近结合分析了目标宽带的电磁散射特性.对于宽带目标,逐个频点计算其雷达截面是非常耗时的.为提高计算效率,通过求解给定频带内的切比雪夫节点和节点处的目标表面电流,可以快速预估频带内任意频点的表面电流,从而得到目标宽带雷达散射截面.由于采用自适应积分方法稀疏存储阻抗矩阵,并加速迭代求解矩阵与矢量相乘,大大减少了计算时间.最后,通过典型算例的数值结果验证了该方法的准确性与高效性.The adaptive integral method（AIM）combined with the best uniform approximation is applied to analyze the scattering of an arbitrarily shaped perfect electric conductor over a wide frequency band. It is time-consuming to obtain the wide-band radar cross section（RCS） by repeating the calculation at each single frequency point. To solve the problem more efficiently, the Chebyshev nodes within a given frequency range are determined firstly, and the surface electric currents at those nodes are computed with AIM. According to the best uniform approximation, the electric currents can be obtained at any frequency within the given frequency range. Thus the wide-band RCS of the objects can be acquired. Due to the fact that the AIM is employed to reduce matrix storage where full matrices are stored in a sparse form and to accelerate the matrix-vector multiplications, the algorithm reduces the solution time. Finally, numerical examples are presented to demonstrate the accuracy and efficiency of this technique.

关 键 词：自适应积分方法 最佳一致逼近 宽带雷达截面 

分 类 号：TN011[电子电信—物理电子学]