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Conference Papers Year : 2011

Investigation on the accuracy of equivalent electric models for mushrooms strutures

Abstract

Planar distributed periodic structures more commonly known as mushroom structures which present a negative refractive index (NRI) in a very narrow frequency band, are usually studied using equivalent electric models under quasi-static approximation. The dispersion equations for different configurations can be established using Bloch theorem for 2D transmission lines (TL). This paper proposes a critical study concerning the validation of results obtained from these utilised dispersion equations through comparing them to those obtained using a full-wave method. An extraction method has been proposed to simulate the frequency dependent of each distributed element. These results show a frequency dependence different from that obtained from effective elements calculated using conventional analytical formulas for the effective material parameters of the unit cell.
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Dates and versions

hal-00598790 , version 1 (07-04-2014)

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Zine Eddine Djeffal, Hakeim Talleb, David Lautru, Victor Fouad Hanna. Investigation on the accuracy of equivalent electric models for mushrooms strutures. Conference IEEE AP-S /URSI 2011, Jul 2011, Spokane, Washinghton, United States. pp.2940 - 2943, ⟨10.1109/APS.2011.5997144⟩. ⟨hal-00598790⟩
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