左手介质覆盖导体圆柱对平面电磁波的散射特性研究

On Scattering Characteristic of Conductor Cylinder Covered by Left-handed Material to Plane Electromagnetic Wave

本文通过数值计算的结果,具体分析比较了左手介质覆盖导体圆柱与普通介质覆盖导体圆柱对平面波散射的近场和远场的电磁特性,发现这两种介质层在距离中心轴线约1.570λ￣1.80λ范围内的近场分布有明显不同,左手介质层内的场变化较后者缓慢;而二者对平面波的远场分布是完全一致的,几乎没有差别。

This paper compared the scattering characteristic of conductor cylinder covered by left-handed medium to plane electromagnetic wave, with that covered by conventional medium. The conclusion is that there are obviously differences near field distributions in the distance about 1.57λ0-1.Sλ0 to the central axis between this two kinds of medium, which is the field change in the left-handed medium is slower than that in conventional medium, while their far field distributions of plane electromagnetic are in full accord with each other.