FAFFA加速的PO-MM研究复杂金属载体上线天线电磁特性

本文提出了一种快速远场近似(FAFFA)加速的混合物理光学矩量法(POMM),利用FAFFA加速计算矩阵方程中的矩阵矢量积,明显提高了计算效率.对物体表面上的远场组之间的耦合作用推导出了一组简洁的计算公式,并分析了计算复杂度.复杂金属组合体上线天线输入导纳、互导纳和方向性图的计算结果与文献结果一致.利用该方法分析计算了一个舰船模型上线天线的电磁特性.数值结果表明了这种方法的正确性和工程应用中的有效性.

FAFFA Accelerated PO-MM for the Simulation of Electromagnetic Behavior of Wire Antennas Mounted on Complex PEC Objects

The fast far field approximation (FAFFA) technique is employed in the hybrid physical optics-moment method (PO-MM) to speed up the matrix-vector product in the solution of matrix equation.New formulas accounting for the electromagnetic interaction among far-field groups have been derived.The computational complexity of the proposed technique is analyzed.The calculated results of radiation pattern,input admittance and mutual admittance of wire antennas on a complex platform are in good agreement with those in literature.Numerical results of wire antennas mounted on a ship model are also presented,which illustrate the accuracy and efficiency of the proposed technique.