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P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space
Joint Authors
Hu, Jun
Guo, Lan-Wei
Chen, Yongpin
Li, Joshua Le-Wei
Source
International Journal of Antennas and Propagation
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-12-22
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
A highly efficient and robust scheme is proposed for analyzing electromagnetic scattering from electrically large arbitrary shaped conductors in a half space.
This scheme is based on the electric field integral equation (EFIE) with a half-space Green’s function.
The precorrected fast Fourier transform (p-FFT) is first extended to a half space for general three-dimensional scattering problems.
A novel enhanced dual threshold incomplete LU factorization (ILUT) is then constructed as an effective preconditioner to improve the convergence of the half-space EFIE.
Inspired by the idea of the improved electric field integral operator (IEFIO), the geometrical-optics current/principle value term of the magnetic field integral equation is used as a physical perturbation to stabilize the traditional ILUT perconditioning matrix.
The high accuracy of EFIE is maintained, yet good calculating efficiency comparable to the combined field integral equation (CFIE) can be achieved.
Furthermore, this approach can be applied to arbitrary geometrical structures including open surfaces and requires no extra types of Sommerfeld integrals needed in the half-space CFIE.
Numerical examples are presented to demonstrate the high performance of the proposed solver among several other approaches in typical half-space problems.
American Psychological Association (APA)
Guo, Lan-Wei& Chen, Yongpin& Hu, Jun& Li, Joshua Le-Wei. 2015. P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space. International Journal of Antennas and Propagation،Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1065188
Modern Language Association (MLA)
Guo, Lan-Wei…[et al.]. P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space. International Journal of Antennas and Propagation No. 2015 (2015), pp.1-9.
https://search.emarefa.net/detail/BIM-1065188
American Medical Association (AMA)
Guo, Lan-Wei& Chen, Yongpin& Hu, Jun& Li, Joshua Le-Wei. P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space. International Journal of Antennas and Propagation. 2015. Vol. 2015, no. 2015, pp.1-9.
https://search.emarefa.net/detail/BIM-1065188
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1065188