Title :
The CFS-PML for Periodic Laguerre-Based FDTD Method
Author :
Cai, Zhao-Yang ; Chen, Bin ; Liu, Kai ; Duan, Yantao ; Mao, Yunfei
Author_Institution :
Dept. of Lightning & Electromagn. Pulse, PLA Univ. of Sci. & Technol., Nanjing, China
fDate :
4/1/2012 12:00:00 AM
Abstract :
In this letter, the complex frequency shifted (CFS) perfectly matched layer (PML) is developed for the unconditionally stable finite-difference time-domain method based on weighted Laguerre polynomials for periodic structures. To verify the validity of the presented method, a numerical example of scattering from periodic structures is given. Numerical results show that, compared with the traditional PML, the CFS-PML is more effective in absorbing the evanescent waves, and has about 32 dB improvement in terms of the maximum relative error and much lower reflection error for the late-time.
Keywords :
electromagnetic wave absorption; electromagnetic wave scattering; finite difference time-domain analysis; periodic structures; polynomials; CFS-PML; complex frequency shifted perfectly matched layer; electromagnetic scattering; evanescent waves; finite-difference time-domain method; maximum relative error; periodic Laguerre-based FDTD method; periodic structures; reflection error; weighted Laguerre polynomials; Educational institutions; Finite difference methods; Lattices; Perfectly matched layers; Periodic structures; Polynomials; Time domain analysis; Complex frequency shifted (CFS); finite-difference time-domain (FDTD); perfectly matched layer (PML); periodic structures; unconditionally stable method; weighted Laguerre polynomials;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2188786
