A New SDIE Based on CFIE for Electromagnetic Scattering From IBC Objects

This article presents a new self-dual integral equation (SDIE) for electromagnetic scattering from arbitrarily impedance boundary condition (IBC) objects including partly coated objects. The proposed SDIE is constructed by using the combined field integral equation (CFIE) and IBC, shorted as C-SDIE....

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2020-01, Vol.68 (1), p.388-399
Main Authors: Gao, Hong-Wei, Yang, Ming-Lin, Sheng, Xin-Qing
Format: Article
Language:English
Subjects:
Boundary conditions
Current
Discontinuous Galerkin (DG) method
Domain decomposition methods
domain decomposition preconditioning (DDP)
electromagnetic (EM) scattering
Electromagnetic scattering
Galerkin method
Impedance
impedance boundary condition (IBC)
Integral equations
Magnetic domains
Magnetic resonance
Method of moments
Preconditioning
self-dual integral equation (SDIE)
Surface impedance
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Summary:This article presents a new self-dual integral equation (SDIE) for electromagnetic scattering from arbitrarily impedance boundary condition (IBC) objects including partly coated objects. The proposed SDIE is constructed by using the combined field integral equation (CFIE) and IBC, shorted as C-SDIE. To overcome the difficulty of discontinuous surface impedance from nonuniform IBC/partly coated objects, the discontinuous Galerkin (DG) method is applied to discretize the C-SDIE. Numerical experiments confirm that the DG-C-SDIE has promising numerical performance in terms of accuracy and efficiency. Furthermore, the domain decomposition preconditioning based on DG is employed to further enhance the proposed DG-C-SDIE for large-scale, multi-scale objects. The numerical results demonstrate the capability of the proposed DG-C-SDIE.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2019.2940609