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The 2.5D FDTD and Fourier PSTD methods and applications
Author(s) -
Tang Zibin,
Liu Qing Huo
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10783
Subject(s) - finite difference time domain method , perfectly matched layer , microwave , fourier transform , radar cross section , microwave imaging , algorithm , frequency domain , optics , computer science , mathematics , physics , radar , mathematical analysis , telecommunications
In this work, 2.5‐dimensional finite‐difference time‐domain (FDTD) and pseudospectral time‐domain (PSTD) algorithms are developed for electromagnetic waves in media that are invariant in one spatial dimension. Both algorithms use Berenger's perfect matched layer (PML) as an absorbing boundary condition. The FDTD method is an extension of Yee's 3D algorithm to 2.5D. The PSTD algorithm uses the fast Fourier transform to approximate spatial derivatives, and gives a much higher accuracy than the FDTD method. Numerical results have been validated by comparing them with analytical solutions. The methods have been applied to ground‐penetrating‐radar and dielectric‐waveguide problems. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 430–436, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10783