平面分层媒质中浅层埋入体的脉冲电磁散射

应用稳定的双共轭梯度-快速傅立叶变换(BCGS-FFT)方法,分析了两媒质半空间和三分层媒质中浅层埋入体的脉冲电磁散射.由于FFT及快速迭代算法的运用,相对于传统的矩量法而言大大降低了计算时间和内存需求,使得算法能够用于解决平面分层背景下大尺度电磁散射问题.数值验算的结果反映了媒质的构造特征及目标的相对位置,显示出算法的有效性,为浅层埋入目标相控阵探地雷达的实现奠定了一定的理论基础.

Impulse Electromagnetic Scattering of Shallow Burried Objects in Planarly Layered Medium

The stabilized biconjugate gradient and fast Fourier transform method(BCGS-FFT) is deployed to analyze the transient EM characterization of the objects embedded in a half-space and a three-layer background .Due to application of the FFT and the fast iterative algorithm BCGS,the CPU time and memory cost of this BCGS-FFT methods are O(NlogN) and O( N ),respectively,significantly more efficient than that of moments(MoM).As a result,this method is capable of solving large-scale EM scattering problems in a planarly layered background.The numberical results reveal the structure characterization of the medium and the relative position of the object prove the validity of the algorithm, the theoretical foundation is provided for the design of the phased ground-penetrated radar to detect near objects.