Optimization-based synthesis of a metamaterial electric cloak using nonhomogeneous composite materials

ABSTRACT

In the paper the synthesis of an electric cloak is discussed. The nonhomogeneous composite material was proposed as a realization of a stationary electric field metamaterial with anisotropic properties necessary for cloaking objects. The particle swarm optimization (PSO) method was applied for the synthesis of nonhomogeneous material composed of periodically arranged unit cells. Anisotropic properties of metamaterial were achieved by adjusting the internal geometry of a porous unit cell structure. Proposed elements have a wide range of effective electrical conductivities in orthogonal directions of an external static electric field. Optimization scheme was applied to design the required unit cell structure, defined by four geometrical parameters modified and adjusted by the PSO. The numerical models of the conductive background, non-conductive object and several types of cloaks were investigated. The results obtained by The Finite element method (FEM) were characterized with respect to theoretical values of the required conductivities and cloaking effectiveness.

KEYWORDS:

• Transformation Laplacian metamaterials
• particle swarm optimization
• anisotropic composite materials
• DC current cloaks

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Adam Steckiewicz http://orcid.org/0000-0001-9723-8602

Agnieszka Choroszucho http://orcid.org/0000-0001-7884-9264

Additional information

Funding

This work was supported by the Ministry of Science and Higher Education (Ministerstwo Nauki i Szkolnictwa Wyższego) in Poland under work No. S/WE/2/2018.

Notes on contributors

Adam Steckiewicz

Adam Steckiewicz: Research associate at Faculty of Electrical Engineering of Bialystok University of Technology. His interests are electromagnetism, metamaterials, laminar composites and circuit theory. Current work focuses on composite materials of quasi-stationary electric and magnetic fields.

Agnieszka Choroszucho

Agnieszka Choroszucho: Received PhD Eng degree in electrical engineering. Assistant professor at Faculty of Electrical Engineering of Bialystok University of Technology. Her research areas include computational electromagnetism, wireless communications and numerical computing analysis.