%0 Journal Article
%T Approximate Electromagnetic Cloaking of a Dielectric Sphere Using Homogeneous Isotropic Multi-Layered Materials
%A Hany M. Zamel
%A Essam El Diwany
%A Hadia El Hennawy
%J Journal of Electromagnetic Analysis and Applications
%P 379-387
%@ 1942-0749
%D 2013
%I Scientific Research Publishing
%R 10.4236/jemaa.2013.510060
%X <p class=\"MsoNormal\">
	<span style=\"font-family:Verdana;\" lang=\"EN-US\">In cloaking,</span><span lang=\"EN-US\"> </span><span style=\"font-family:Verdana;\" lang=\"EN-US\">a body is hidden from detection by surrounding it by a coating consisting of an unusual anisotropic nonhomogeneous material. The permittivity and permeability of such a cloak are determined by the coordinate transformation of compressing a hidden body into a point or a line. The radially-dependent spherical cloaking shell can be approximately discretized into many homogeneous anisotropic layers; each anisotropic layer can be replaced by a pair of equivalent isotropic sub-layers, where the effective medium approximation is used to find the parameters of these two equivalent sub-layers. In this work, the scattering properties of cloaked dielectric sphere is investigated using a combination of approximate cloaking, where the dielectric sphere is transformed into a small sphere rather than to a point, together with discretizing the cloaking material using pairs of homogeneous isotropic sub-layers. The back-scattering normalized radar cross section, the scattering pattern</span><span style=\"font-family:Verdana;\" lang=\"EN-US\">s</span><span style=\"font-family:Verdana;\" lang=\"EN-US\"> are studied and the total scattering cross section against the frequency for different number of layers and transformed radius.</span> 
</p>
%K Approximate Cloaking
%K Dielectric Sphere
%K Cloaking by Layered Isotropic Materials
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=38530