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International Journal of Antennas and Propagation
Volume 2017, Article ID 2939702, 6 pages
Research Article

A Novel Scheme with FG-FFT for Analysis of Electromagnetic Scattering from Large Objects

1Industrial Center, Nanjing Institute of Technology, Nanjing 211167, China
2State Key Laboratory of Millimeter Waves, Nanjing 210096, China
3College of Information Engineering, Yancheng Institute of Technology, Yancheng 224051, China
4Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230601, China

Correspondence should be addressed to Jia-Ye Xie; nc.ude.tijn@eixeyaij

Received 27 April 2017; Accepted 17 August 2017; Published 28 September 2017

Academic Editor: Angelo Liseno

Copyright © 2017 Jia-Ye Xie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The replacement values to the singularity of fitting Green’s function are intensively researched in Fitting Green’s function Fast Fourier Transformation (FG-FFT). As is shown in the research, the accuracy of fitting Green’s function of near element is affected by different replacement values. The experiments show that an appropriate replacement value can improve the accuracy of fitting Green’s function of near element, and it is called the optimal replacement value in this paper. In the case of application of the proposed scheme to FG-FFT, the number of the near correction elements is significantly reduced. Therefore, the optimal replacement scheme can dramatically reduce the memory requirement and computing time in FG-FFT. The experiments show that, compared with traditional random replacement schemes, the optimal replacement scheme can reduce the number of the near correction elements by about 55%60% and greatly improve the computational efficiency of FG-FFT.