一类具有易实现本构参数的线变换斗篷
A class of line-transformed cloaks with easily-realizable constitutive parameters
摘要：
我们提出了一类线变换的圆柱形斗篷，它具有易于实现的本构参数。这种斗篷的散射特性进行了研究数值为横向电（TE）和横向磁（TM）的平面波入射。一件具有完美导电（PEC）内边界的线变换隐形斗篷实际上是一条PEC线的重塑，隐形物体被挤压到PEC线上。近场分布和远场散射特性的数值计算结果验证了上述结论。我们还研究了线变换斗篷的本构参数与相应线的长度之间的关系。直线较短时，本构参数的变化幅度较大;直线较长时，本构参数的变化幅度较小。上述结论为利用人工超材料实现隐身衣提供了一条有效途径。
英文摘要：
We propose a class of line-transformed cylindrical cloaks which have easily-realizable constitutive parameters. The scattering properties of such cloaks have been investigated numerically for both transverse-electric (TE) and transverse-magnetic (TM) incidences of plane waves. A line-transformed invisibility cloak with a perfectly electric conducting (PEC) inner boundary is actually a reshaping of a PEC line to which the cloaked object is crushed. The numerical results of near-field distributions and far-field scattering properties have verified the above conclusions. We also investigate the relationship between the constitutive parameters of a line-transformed cloak and the length of the corresponding line. The changing range of constitutive parameters is large when the line is short, while the changing range becomes small when the line is long. The above conclusion provides an efficient way to realize the invisibility cloaks using artificial metamaterials.
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