基于时域有限差分埋藏导体电磁波散射特性

目的为了探测和研究埋藏导体的物理性质。方法利用时域有限差分(FDTD)方法,计算了在脉冲电磁波入射的条件下,埋藏在沙土中导体球对入射电磁波散射的散射场。结果表明埋藏在沙土中的导体球面不仅仅存在一次和二次散射波,而且还存在多次波和爬行波。结论通过散射波的特征研究,可以进行埋藏导体埋藏深度和大小的预测。

Research on scattering characteristics of electromagnetic wave on buried conductor surface

Aim In order to survey and research the physical characters of buried conducter.Methods By using the method of finite difference at time domain and on the condition of incidence of pulse electromagnetic wave,scattered field was calculated by incident electromagnetic wave scattered on conductor sphere buried in sandy soil.Results The calculation result shows that spherical surface of the conductor buried in sandy soil presents not only primary and secondary scattered waves but also multiple wave and creeping wave,that is consistent with the result of theoretical analysis.Conclusion Analysis on characteristics of buried conductor can be implemented through research on features of scattered waves so that the depth and the size of buried conductor can be calculated.