平面分层媒质中电大尺寸埋人体的电磁散射研究

对基于稳定的双共轭梯度一快速傅里叶变换（BCGs_FFT）和改进的离散复镜像方法的平面分层媒质电大尺寸埋入体的电磁散射计算进行了研究。给出了理论推导过程。数值计算结果表明：改进的离散复镜像法在不提取准静态项和表面波项的条件下，可拟合获得准确的近区和远区空域格林函数结果，并加快了分层媒质中电大尺寸埋入体空域格林函数的计算速度。

Study on Electromagnetic Scattering by Electrically Large Objects Embedded in Planarly Multilayered Media

The calculating algorithm of the electromagnetic scattering for electrically large objects embedded in the planarly multilayered media based on the stabilized biconjugate gradient fast Fourier transform （BCGS-FFT） method and an improved discrete complex image method （DCIM） was studied in this paper. The theory derivation was given out. The numerical computation results showed that the correct Green function of the spatial area in the near-field and far-field could be simulated by the DCM under the conditions of the static item and surface beam item not extracted, and the computation speed was accelerated.