NDLI: Frequency dispersion in chiral and omega media: an approximate theoretical model

Content Provider	IEEE Xplore Digital Library
Author	Tretyakov, S.A. Kharina, T.G. Simovski, K.R. Pavlov, A.A.
Copyright Year	1994
Description	Author affiliation: Dept. of Radiophys., St. Petersburg State Tech. Univ., Russia (Tretyakov, S.A.; Kharina, T.G.)
Abstract	Addresses the problem of modeling constitutive parameters of artificial isotropic chiral and bianisotropic omega composites. Magnetoelectric interaction in these composites is provided by chiral electrically small helices or n-shaped inclusions distributed in a isotropic dielectric or magnetodielectric matrix. The goal is to find a way to predict macroscopic properties of whole composites from the sizes of particles and the inclusion concentration. The authors propose a simple analytical model which leads to explicit relations between scatterers' configuration and the constitutive parameters. The approach is based on the antenna model of single chiral end omega particles. Each particle is considered as a wire-and-loop structure of appropriate geometry, and antenna theory is used to calculate the polarizabilities. Based on the Maxwell-Garnett model (generalized for arbitrary dyadic polarizabilities in Weiglhofer et al., 1993) the authors study the permittivity, permeability and coupling parameters of composites with particles either randomly distributed or arranged in arrays. The model conforms to basic physical requirements such as the reciprocity theorem and gives proper limiting values at low or high frequencies. Computed curves demonstrate the most typical frequency behaviour of the constitutive parameters of isotropic chiral and bianisotropic omega composites.<>
Starting Page	722
Ending Page	725
File Size	160399
Page Count	4
File Format	PDF
ISBN	0780320093
DOI	10.1109/APS.1994.407989
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-20
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Polarization Dielectrics Analytical models Particle scattering Scattering parameters Geometry Antenna theory Permittivity Permeability
Content Type	Text
Resource Type	Article

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