计算电大尺寸建筑物内电波场强的PSTD方法

本文采用一种新的时域数值方法－伪谱时域（ＰＳＴＤ）法来计算电大尺寸建筑物内电波场强。提出了由初始条件技术和一维ＰＳＴＤ方程对入射平面波脉冲进行模拟，并利用纯散射场法和线性插值把平面波引入求解问题空间，有效地解决了ＰＳＴＤ方法中入射波设置问题。数值结果表明这种新方法用于模拟电大尺寸建筑物内电波场强的精度和有效性。

The pseudospectral time-domain(PSTD) algorithm for calculating field strength in an electrically large building

In this paper,a new time domain numerical method,named as the pseudospectral time domain(PSTD)algorithm,is used to calculating radio wave field strength in an electrically large building To surmount the difficulty of the introduction of incident wave,we propose to use an initialcondition technique in connection with the one dimension PSTD equations to simulate incident plane wave pulse,then the pure scattered field formulation and the linear interpolation technique to introduce the incident pulse into the computational space Comparisons between results obtained using the PSTD algorithm and the FDTD method clearly illustrate the advantage of the PSTD algorithm in obtaining radio wave field strength in the electrically large building