电大涂覆载体天线间宽频带干扰快速分析

分析电大尺寸涂层体天线间的宽带干扰,必须解决电大尺寸涂层体电磁快速计算问题和宽带参数计算问题。首先建立了天线间干扰分析模型,并提出了一种混合单元级矢量有限元/自适应多层快速多极子算法,算法中有限元部分的计算可在单元级上完成,无须生成总体系数矩阵,因此可大大节省内存及计算时间;将多层快速多极子算法中的基函数和权函数分别用不同空间位置上的点源函数展开,使各部分的积分计算得到大大简化,所有转移过程可由快速傅里叶变换计算完成。最后结合波形渐进估计技术实现了宽带干扰参数的快速计算。数值结果说明了方法的有效性。

Fast analysis of broad band interference coupling of antennae on electrically large coated targets

Electrically large electromagnetic fast computation and broad band parameter fast calculation are the core technique in the broad band interference analysis of antennae on electrically large coated targets.The analytic model of interantenna interference is introduced first,a novel hybrid algorithm based on the element level vector-finite element method(ELVFEM) and the adaptive multilevel fast multipole algorithm(AMLFMA) is introduced simultaneously.The calculation of the section of ELVFEM can be finished at elementary level and no need to form the global coefficient matrix,so the CPU time and memory capacity can be reduced significantly.By expanding the basis functions and testing functions with Dirac functions on different position,the integration calculation of the AMLFMA can be simplified and all the transformation calculation can be finished by FFT.Combining this algorithm with asymptotic wave form evaluation(AWE) techniques,the broad band interference parameter can be calculated fast.Numerical results show the effectiveness of the presented method.