Invisibility Cloaks Modeled by Anisotropic Metamaterials Based on Inductor-capacitor Networks

TL;DR

This paper presents a planar anisotropic metamaterial design for invisibility cloaks using inductor-capacitor networks, demonstrating broadband operation and full parameter realization based on transformation optics.

Contribution

It introduces a novel transmission-line approach with inhomogeneous anisotropic metamaterials for 2D cylindrical cloaks, enabling broadband and full parameter implementation.

Findings

Successfully modeled a VHF band cloak demonstrating invisibility.

The cloak exhibits broadband characteristics due to non-resonant L-C elements.

Full parameter realization achieved through spatially inhomogeneous anisotropic metamaterials.

Abstract

Based on the transformation optics, a novel transmission-line (TL) approach to realize invisibility cloaking using planar anisotropic metamaterials (MTMs) is proposed. The two-dimensional cylindrical cloaks are modeled based on inductor-capacitor (L-C) MTMs networks. The three elements of the constitutive parameters are all allowed to be spatially inhomogeneous which lead to the full parameter realization of a cylindrical cloak. As an example, a cloak working at VHF band is modeled and its invisibility behavior is demonstrated based on the solution of the node voltage distribution. Due to the non-resonant properties of the L-C elements, the broadband characteristic of the proposed cloaks is also evident.