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Mathematical Problems in Engineering
Volume 2011, Article ID 727605, 12 pages
Research Article

Effect of Dissipative and Dispersive DNG Material Coating on the Scattering Behavior of Parallel Nihility Circular Cylinders

1Department of Electronics, Quaid-i-Azam University, Islamabad 45320, Pakistan
2Department of Physics, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
3Department of Physics, University of Agriculture, Faisalabad, Pakistan

Received 12 November 2010; Revised 29 January 2011; Accepted 16 March 2011

Academic Editor: J. Jiang

Copyright © 2011 Shakeel Ahmed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Electromagnetic scattering from coated nihility circular cylinders, illuminated by E-polarized plane wave, is investigated using an iterative procedure. Cylinders are infinite in length. The boundary conditions are applied on the surface of each cylinder in an iterative procedure in order to solve for the field expansion coefficients. The effect of different types of the coating layers including double positive (DPS) and double negative (DNG) on the alteration of the forward and backward scattering has been observed. Specially, the effect of dispersive and dissipative DNG coating layer has been focused. Numerical verifications are presented to prove the validity of this formulation by comparison with the published literature.