一种探测二维电磁目标的新方法

A Novel Method for Detecting Two Dimensional Electromagnetic Targets

电磁目标的探测对通信而言有着十分重要的意义。本文描述一种收敛迅速、结果准确、抗强随机噪声的探测二维电磁目标的新方法。首先从体等效原理出发得到一个积分方程组，此方程组可求解散射问题。随后，对此方程组求变分，变形后得到散射场变化与介电参数变化之间关系的矩阵方程，即反演方程。文中列举了几个例子，通过数值实验结果证明本法收敛速度快、反演精度高、适应复杂目标的能力强。

The detection of electromagnetic targets is very important in communication. In this paper, a novel method for detecting two dimensional electromagnetic targets is presented. A system of integral equations is obtained by the principle of volumn equivalence. The scattering problem can be solved from it. After taking variation, the relation between the variation of the cylinder's permittivity and conductivity and the variation of the scattered field is derived. It is the inversion equation of this method. Several examples are given. From numerical results, we can see that this method converges to the true distribution rapidly and accurately and that it can adapt complex objects. What's more, it can endure the effect of strong random noise.