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Analysis of losses in a double-negative metamaterial composed of magnetodielectric spheres embedded in a matrix

✍ Scribed by Jin Liu; Nicola Bowler

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
269 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A simple‐cubic lattice of identical, magnetodielectric spheres exhibiting double‐negative (DNG) behavior is analyzed.An analytic expression for the threshold loss angle δ~th~ of the spheres, above which DNG behavior is extinguished, is derived by utilizing the Möbius transformation. The formula is valid for either dielectric or magnetic loss exhibited by the particles, and is derived based on the dipole approximation of Mie's theory of scattering by a sphere. For spheres with equal real relative permittivity and permeability, it is shown that δ~th~ increases as particle volume fraction increases. It is also shown that the loss angle of the effective medium can be controlled by appropriate choice of frequency. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26081

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