Scattering from silver metal cylinder due to L-nihility coated with conducting sheath helix embedded dielectric medium

N. Iqbal, P.K. Choudhury and P.S. Menon

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 10, 1354-1374

Abstract: In this article, scattering from silver metal cylinder due to L-nihility, coated with dielectric material that encapsulates perfectly electric conducting sheath helix structure, is presented. The orientation of helix can be altered, and the cases of both the parallel (TM) and the perpendicular (TE) polarizations of electromagnetic (EM) waves are analyzed. Co- and cross-polarized fields for different values of pitch angle are formulated under oblique angle of incidence. The bi-static echo width of the scatterer is investigated as a function of ϕ$ \phi $ at the L-nihility frequency which lies within the optical frequency range. The results are compared with those obtained for perfect electric conductor (PEC) at different values of the angle of incidence. It is observed that the considered guiding structure behaves identically with the simple PEC cylinder under the situation when the helix structure is oriented parallel to the axial direction of the guide. However, for the other forms of the helix orientation, the structure behaves differently – thereby confirming the validity of the analytical approach for the aforementioned complex structured guide presented in the article.

Date: 2015
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DOI: 10.1080/09205071.2015.1044128

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