Title :
FDTD Modeling of electromagnetic cloaks
Author_Institution :
Dept. of Electron. Eng., Univ. of London, London
Abstract :
In this paper, a radial-dependent dispersive FDTD method is developed to model metamaterials based on coordinate transformation. Such artificial materials have been applied in developing electromagnetic cloaking devices, plane wave concentrators and wave polarization rotators. By using the time-domain numerical technique, the transient response and operational bandwidth of the proposed metamaterials is evaluated. It is demonstrated, for example, that the perfect "invisibility" from electromagnetic cloaks is only available for lossless metamaterials and within an extremely narrow frequency band.
Keywords :
electromagnetic devices; finite difference time-domain analysis; metamaterials; microwave materials; transient response; coordinate transformation; electromagnetic cloaking device; metamaterials; operational bandwidth; plane wave concentrator; radial-dependent dispersive FDTD method; time-domain numerical technique; transient response; wave polarization rotator; Bandwidth; Dispersion; Electromagnetic devices; Electromagnetic modeling; Electromagnetic scattering; Electromagnetic wave polarization; Finite difference methods; Metamaterials; Time domain analysis; Transient response;
Conference_Titel :
Metamaterials, 2008 International Workshop on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-2608-9
Electronic_ISBN :
978-1-4244-2609-6
DOI :
10.1109/META.2008.4723515
