解决电磁散射问题的现代高频技术

电大尺寸散射体的高频散射高效算法问题是一个重要而具有挑战性的问题.本文首先对解决电磁散射问题的现代高频方法的研究进展进行了综述.其次，对高频散射场的高振荡特性，提出了数值最速下降路径法来计算高频散射场.最后，综合讨论了高频驻相点贡献凯勒锥以及爬行波场.

The modern high frequency methods for solving electromagnetic scattering problems

The high frequency scattering problems of electromagnetic fields scattered from electrically large scatterers are important and challenging.On the calculation of the reflected and diffracted wave fields,the high frequency methods could be classified into the current based method and the ray based method.In this paper,first,the author gives a review on the progress of the modern high frequency methods for solving the electromagnetic scattering problems.Next,due to the highly oscillatory property of the high frequency electromagnetic scattered fields,the author proposes the numerical steepest descent path method.Finally,the author comprehensively addresses the high frequency wave physics,including the high frequency critical point contributions,the Keller’s cone,the shadow and reflection boundaries and the creeping wave fields.