FDTD Study on Back Scattering of Conducting Sphere Coated with Double-Negatibe Metamaterials
The shift operator method in finite-difference time-domain method for anisotropic double-negative (DNG) metamaterials is derived. The problem which incorporates both anisotropy and frequency dispersion at the same time is solved for the electromagnetic wave propagation in DNG media. By comparing with the mie series solution, the numerical verification of the method and program are confirmed by computing the back scattering of isotropic unmagnetized plasma sphere. The back scattering of conducting sphere coated with DNG media with different parameters is computed by using the shift operator method. One finds that the degree of DNG media’s match and isotropy plays important parts in the decrease of the back scattering of the conducting sphere.
KeywordsDouble-negative metamaterials Finite-difference time-domain method Back scattering Anisotropic plasma
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- 4.Anthony Lai, Christophe Caloz, and Tatsuo Itoh, “Composite right/left-handed transmission line metamterials,” IEEE Microw. Mag., 35–50 (2004).Google Scholar
- 10.Wei Bing, Debiao Ge, and Maoyan Wang, “Wide band scattering of perfectly conducting object coated with DNM,” Syst. Eng. Electron. 28 (6), 840–843 (2006).Google Scholar
- 11.Lixia Yang and Debiao Ge, “Pad é -finite-difference time-domain analysis of electromagnetic scattering in magnetic anisotropic medium,” Acta Phys. Sin. 54 (4), 1751–1758 (2006).Google Scholar