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IE‐FFT for the combined field integral equation applied to electrically large objects
Author(s) -
Xie JiaYe,
Zhou HouXing,
Li WeiDong,
Hong Wei
Publication year - 2012
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.26697
Subject(s) - fast fourier transform , interpolation (computer graphics) , lagrange polynomial , integral equation , microwave , function (biology) , mathematics , scheme (mathematics) , operator (biology) , field (mathematics) , cartesian coordinate system , mathematical analysis , fourier transform , algorithm , computer science , geometry , telecommunications , pure mathematics , image (mathematics) , computer vision , biochemistry , chemistry , repressor , evolutionary biology , transcription factor , polynomial , gene , biology
A new scheme of the integral equation fast Fourier transform for the combined field integral equation applied to electrically large objects is presented in this article. Lagrange interpolation is applied to the gradient of the Green's function on regular Cartesian grids, which is similar to the method of interpolating the Green's function. Compared with the gradient operator acting on the interpolated Green's function, the present method can provide higher accuracy with slightly more storage. The error analysis and some numerical examples are provided to demonstrate the accuracy and efficiency of the proposed scheme. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:891–896, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26697