A new approach for determination of the attenuation bandwidth of a resonating metamaterial

Banerjee, A, Das, R and Calius, E 2015, 'A new approach for determination of the attenuation bandwidth of a resonating metamaterial', in Yuantong Gu, Hong Guan, Emilie Sauret, Suvash Saha, Haifei Zhan, Rodney Persky (ed.) Proceedings of the 2nd Australasian Conference on Computational Mechanics Advances of Computational Mechanics in Australia Volume 846 (ACCM 2015), Brisbane, Australia, 30 November-1 December 2015, pp. 264-269.


Document type: Conference Paper
Collection: Conference Papers

Title A new approach for determination of the attenuation bandwidth of a resonating metamaterial
Author(s) Banerjee, A
Das, R
Calius, E
Year 2015
Conference name ACCM 2015: Applied Mechanics and Materials
Conference location Brisbane, Australia
Conference dates 30 November-1 December 2015
Proceedings title Proceedings of the 2nd Australasian Conference on Computational Mechanics Advances of Computational Mechanics in Australia Volume 846 (ACCM 2015)
Editor(s) Yuantong Gu, Hong Guan, Emilie Sauret, Suvash Saha, Haifei Zhan, Rodney Persky
Publisher Applied Mechanics and Materials
Place of publication Brisbane, Australia
Start page 264
End page 269
Total pages 6
Abstract Due to the presence of internal structures, metamaterials, a new class of artificial materials, can be engineered to have various unconventional properties during wave interaction. They can be rationally designed to offer controlled mechanical, acoustic or electromagnetic properties through resonant electromagnetic, acoustic or mechanical structures inside the metamaterial. Due to these properties, metamaterials have been effectively used for cloaking, wave guiding and designing filters in the field of optics, electromagnetics, acoustics and elastodynamics. In this paper, a Fourier transfer based methodology is proposed to determine the attenuation bandwidth of a metamaterial instead of using conventional Bloch's theorem. The applicability of this method is wider than that of Bloch's theorem, because this method allows analysis beyond the necessary periodicity of the metamaterial. All the governing equations are non-dimensionalised to effectively quantify the attenuation bandwidth at the lower and higher frequency range of the resonating frequency of the internal structures present in the matrix of the material. The attenuation bandwidth is characterized into low and high frequency parts to determine the effect of the variation of the mass ratio and the number of the repeating units on the attenuation bandwidth of the 1D metamaterial chain.
Subjects Materials Engineering not elsewhere classified
Keyword(s) Attenuation Bandwidth
Bloch's Theorem
Fourier Transform
Metamaterial
Transmission Loss
Wave Transmission
DOI - identifier 10.4028/www.scientific.net/AMM.846.264
Copyright notice © 2016 Trans Tech Publications, Switzerland
ISBN 9783038355281
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