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爬行波与奇点展开法(SEM)极点间关系的建立说明了SEM 极点的物理含义,并可以推出每对极点所描述的电磁振荡的时间和空间图象.本文以此为出发点分析了二维凸光滑理想导电散射体的SEM 极点的近似解析式,揭示了极点的实、虚部随散射体尺度和平均曲率的变化规律,为利用SEM 极点的分布特性,识别散射体特征提供了判断依据.
The establishment of the relationship between the poles of the creep wave and the singular point expansion method (SEM) illustrates the physical meaning of the SEM pole and can introduce the time and space image of the electromagnetic oscillation described by each pair of poles.This paper analyzes the two- The approximate analytic formula of the SEM pole of the convex smooth ideal conductive scatterer reveals that the real and imaginary parts of the pole vary with the scatter body size and the mean curvature, which provides a basis for judging the distribution of the pole of the SEM and identifying the characteristics of the scatterer.