用于空域扫描的表面离散化边界方程法

表面离散化边界方程法可以独立计算物体表面任意点处的电流密度,而所需求逆的矩阵阶数远小于矩量法.文中将它与渐近波形估计相结合实现了空域内的快速扫描,从而避免了许多重复计算.与矩量法相比,新方法降低了所需求逆矩阵的阶数,减小了存储需求,缩短了计算时间,提高了计算效率且易于并行计算.文中还将该方法成功运用到电大尺寸物体的散射问题中.计算表明对于尺寸越大的物体,新方法的优势就越明显.

Application of the On-Surface Discretized Boundary Equation Method in the Spatial Sweep Calculation

The recently developed on-surface discretized boundary equation ( OS-DBE) method for scattering by a conducting cylinder allows an independent determination of the current density at any given point on the object surface with a matrix of smaller order than that in the method of moments. This paper incorporates the asymptotic waveform evaluation technique into the OS-DBE method to the fast spatial sweep calculation to generate the whole current distribution, reduces the number of current calculation points at which the utilization of the OS-DBE is necessary and improves the numerical efficiency. Besides, numerical results are presented to demonstrate the validity and efficiency of the proposed technique compared to the method of moment ( MoM).