大型波导缝隙阵辐射特性的快速分析

Fast Analysis of Radiation of Large Slotted Waveguide Array

针对矩量法分析大型波导缝隙阵时矩阵填充和方程求解速度慢的问题,本文首先给出了负载均衡的并行计算方案,解决了阻抗矩阵填充非常慢这一困难,接着提出了一种新的—“缝隙邻居”预条件方法,因其具有从物理上将基函数之间的近场作用充分考虑到预条件矩阵中的优点,故可将典型共轭梯度法求解矩量法分析缝隙阵所得矩阵方程的收敛速度提高了约一个数量级,从而实现了大型缝隙阵列的快速仿真.数值实例表明本文方法的高效性和准确性.

When the method of moment is employed to analyze large slotted waveguide arrays,filling the impedance matrix and solving the matrix equation are very time consuming.In this paper,a load balancing parallel scheme is first presented to accelerate the filling process. Tnen, a novel preconditioner - SN （slot neighbour） preconditioner is introduced which boosts the advantage of giving adequate consideration to the near field interaction between basis functions when the preconditioning matrix is generated. Numerical resuits demonstrate the validity and efficiency of the proposed algorithms and show that the SN preconditioned CG （conjugate gradient） can significantly accelerate the solution by an order of magnitude for large slot arrays.