Title :
The dispersion characteristics of PBG with complex medium by using non-Yee grid higher order FDTD method
Author :
Xiu Long Bao ; Wen Xun Zhang
Author_Institution :
State Key Lab. Of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
Photonic band-gap (PBG) materials have recently attracted significant interest in the microwave region to suppress surface waves and to improve component performance. In this article, the NY-FDTD (nonYee grid higher order finite difference time-domain) formulation of a PBG structure in an anisotropic medium is derived, and then applied to compute the dispersion curves of 2D PBG structures. The numerical results for the isotropic medium are in good agreement with that from the traditional FDTD method. Then, the dispersion curves for anisotropic media are provided respectively. Which show that both the TM wave in the PBG structure with a magnetic-anisotropic medium and the TE wave in a PBG structure with an electric-anisotropic medium, possess an enhanced bandwidth of the first band-gap and also an increment of the number of bandgaps, compared to that of a PBG with isotropic medium.
Keywords :
anisotropic media; computational electromagnetics; dispersion (wave); finite difference time-domain analysis; photonic band gap; 2D PBG structures; NY-FDTD; PBG dispersion characteristics; TE wave; TM wave; complex medium; dispersion curves; electric-anisotropic medium; finite difference time-domain method; isotropic medium; magnetic-anisotropic medium; nonYee grid higher order FDTD; photonic band-gap materials; surface wave suppression; Anisotropic magnetoresistance; Bandwidth; Finite difference methods; Grid computing; Magnetic anisotropy; Perpendicular magnetic anisotropy; Photonic band gap; Surface waves; Tellurium; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219434
