Naslov
Metamaterial Based Cylinders Used for Invisible Cloak Realization

Autori
Šipuš, Zvonimir ; Bojanjac, Dario ; Ivšić, Branimir ; Komljenović, Tin

Izvornik
European Office of Aerospace Research and Development

Vrsta, podvrsta
Ostale vrste radova, elaborat/studija

Godina
2011

Ključne riječi
metamaterials; anisotropy; cloak

Sažetak
Uniaxial cylindrical cloaks have recently been proposed to prevent scattering of electromagnetic waves, i.e. to render objects invisible. The proposed cloaks with reduced variation of constitutive parameters suffer from nonzero reflectance, i.e. they are only partly invisible. Therefore, the purpose of a 12-month effort is to develop an analysis method and the corresponding software for analyzing cylinders made from metamaterial- based concentric layers with an application to invisible cloak realization. The main parameter of interest is the scattered field, i.e. if the considered structure really appears invisible to the incident wave. The considered structures are modeled as a multilayer anisotropic cylinder where both permittivity and permeability tensors are diagonal in the cylindrical coordinate system. The active cloaks can be also analyzed in this way since their homogeneous electromagnetic model is based on complex constitutive parameters. We have considered incident electromagnetic waves coming both from normal and oblique incident direction. The proposed analysis method is connected with a suitable global optimization routine, and the developed software package is used to help in cloak design. A possible application of the considered prototype is reduction of scattered field from mechanical structures that need to be placed in front of big antennas, such as radar antennas or reflector systems.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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