Title :
A Radially-Dependent Dispersive Finite-Difference Time-Domain Method for the Evaluation of Electromagnetic Cloaks
Author :
Argyropoulos, Christos ; Zhao, Yan ; Hao, Yang
Author_Institution :
Dept. of Electron. Eng., Univ. of London, London
fDate :
5/1/2009 12:00:00 AM
Abstract :
A radially-dependent dispersive finite-difference time-domain (FDTD) method is proposed to simulate electromagnetic cloaking devices. The Drude dispersion model is applied to model the electromagnetic characteristics of the cloaking medium. Both lossless and lossy cloaking materials are examined and their operating bandwidth investigated. It is demonstrated that the perfect ldquoinvisibilityrdquo of electromagnetic cloaks is only available for lossless metamaterials and within an extremely narrow frequency band.
Keywords :
electromagnetic devices; finite difference time-domain analysis; metamaterials; Drude dispersion model; FDTD; cloaking materials; electromagnetic cloaks; lossless metamaterials; radially-dependent dispersive finite-difference time-domain method; Bandwidth; Dispersion; Electromagnetic devices; Electromagnetic modeling; Electromagnetic propagation; Finite difference methods; Frequency; Metamaterials; Optical sensors; Time domain analysis; Cloaking; finite-difference time-domain (FDTD); metamaterials;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2016704
