Title :
A Novel Weakly Conditionally Stable FDTD Method for Periodic Structures
Author :
Mao, Yun-Fei ; Chen, Bin ; Xiong, Run ; Cai, Zhaoyang ; Chen, Qiang
Author_Institution :
Nat. Key Lab. on Electromagn. Environ. & Electro-Opt. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
fDate :
7/4/1905 12:00:00 AM
Abstract :
In this letter, a novel weakly conditionally stable finite-difference time-domain (FDTD) method for solving periodic structures is presented, which is extremely useful for periodic problem with thin slots in one or two directions. To verify the validity of the proposed formulations, a numerical example of electromagnetic band-gap (EBG) structure with thin slots is given. Compared to the alternating-direction implicit FDTD (ADI-FDTD) method, the presented method has higher accuracy and efficiency. Results show the running time can be reduced to about 2/3 of the periodic ADI-FDTD method in the same simulation. To reduce the numerical dispersion error, the optimized procedure is applied.
Keywords :
electromagnetic wave propagation; finite difference time-domain analysis; periodic structures; photonic band gap; alternating-direction implicit FDTD; electromagnetic band gap; numerical dispersion error; periodic structures; weakly conditionally stable finite-difference time-domain method; Finite-difference time-domain (FDTD) method; periodic structure; weakly conditionally stable;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2012.2186627
