Abstract
A numerical scheme, which hybridizes the element-level dual-field time-domain finite-element domain decomposition method (ELDDM) and the time-domain boundary integral (TDBI) method to accurately and efficiently analyze open-region transient electromagnetic scattering problems, is proposed. Element-level decomposition decouples Maxwell equations on a discretization element from those on its neighboring elements using equivalent currents defined on their faces. For any element inside the computation domain, the equivalent currents are obtained from fields in the neighboring elements. For any element on the boundary of the computation domain, the equivalent currents are obtained using the fields generated by TDBI. To generate these fields, TDBI 'radiates' equivalent currents on a Huygens surface enclosing the scatterer. This approach when combined with a leapfrog-type time updates results in a fully explicit numerical scheme that allows ELDDM and TDBI to use different time steps. Numerical results that demonstrate the applicability of the proposed method to concave and disconnected scatterers are presented.
Recommended Citation
M. Dong et al., "An Explicit Time-Domain Finite-Element Boundary Integral Method For Analysis Of Electromagnetic Scattering," IEEE Transactions on Antennas and Propagation, vol. 70, no. 7, pp. 6089 - 6094, Institute of Electrical and Electronics Engineers, Jul 2022.
The definitive version is available at https://doi.org/10.1109/TAP.2022.3142319
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Boundary integral (BI) method; domain decomposition; explicit method; time-domain finite-element method (TDFEM)
International Standard Serial Number (ISSN)
1558-2221; 0018-926X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jul 2022
