DocumentCode :
859419
Title :
Novel BI-FDTD approach for the analysis of chiral cylinders and spheres
Author :
Semichaevsky, Andrey ; Akyurtlu, Alkim ; Kern, Douglas ; Werner, Douglas H. ; Bray, Matthew G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Lowell, MA
Volume :
54
Issue :
3
fYear :
2006
fDate :
3/1/2006 12:00:00 AM
Firstpage :
925
Lastpage :
932
Abstract :
A versatile time-domain technique, known as bi-isotropic finite difference time domain (BI-FDTD), has recently been introduced for the numerical analysis of electromagnetic wave interactions with complex bi-isotropic media. However, to date only one-dimensional BI-FDTD schemes have been successfully implemented. This paper presents novel two-dimensional (2-D) and three-dimensional (3-D) dispersive BI-FDTD formulations for the first time. The update equations for these new 2-D and 3-D BI-FDTD approaches are developed and applied to the analysis of electromagnetic wave scattering by chiral cylinders and spheres in free space. The distinctive feature of this technique is the use of two independent sets of wavefields representing the left- and right-polarized waves in the chiral medium. This wavefield decomposition approach allows dispersive models for the chirality parameter as well as the permittivity and permeability of the medium to be readily incorporated into an FDTD scheme. The 2-D and 3-D BI-FDTD simulation results are compared with available analytical solutions for the scattering from a circular chiral cylinder and a chiral sphere respectively
Keywords :
anisotropic media; chirowaveguides; circular waveguides; dispersion (wave); electromagnetic wave polarisation; electromagnetic wave scattering; finite difference time-domain analysis; magnetic permeability; permittivity; 3D dispersive BI-FDTD approach; biisotropic finite difference time domain; chiral medium; chiral sphere; circular chiral cylinder; electromagnetic wave interaction; electromagnetic wave polarization; electromagnetic wave scattering; permeability; permittivity; Dispersion; Electromagnetic analysis; Electromagnetic scattering; Equations; Finite difference methods; Numerical analysis; Permeability; Permittivity; Time domain analysis; Two dimensional displays; Bi-isotropic finite-difference time-domain (BI-FDTD); chiral cylinder; chiral media; chiral sphere; electromagnetic scattering; finite-difference time-domain (FDTD);
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2006.869898
Filename :
1603818
Link To Document :
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