A class of line-transformed cloaks with easily-realizable constitutive parameters

TL;DR

This paper introduces a new class of line-transformed cylindrical cloaks with easily realizable parameters, demonstrating their scattering properties and relationship between parameters and line length through numerical analysis.

Contribution

It presents a novel line-transformed cloak design with practical constitutive parameters and analyzes their scattering behavior and parameter-line length relationship.

Findings

Numerical verification of scattering properties for TE and TM incidences.

The cloak reshapes a PEC line, effectively crushing the cloaked object.

The range of constitutive parameters varies significantly with line length.

Abstract

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.