A Fast Converging Resonance-Free Global Multi-Trace Method for Scattering by Partially Coated Composite Structures

Global and local multitrace formulations (MTFs) provide a flexible and efficient method for the modeling of scattering and transmission of time harmonic electromagnetic (EM) waves by composite structures. This contribution extends the domain of applicability of global MTFs to cases where penetrable...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-10, Vol.70 (10), p.9534-9543
Main Authors: Lasisi, Shakirudeen, Benson, Trevor M., Gradoni, Gabriele, Greenaway, Mark, Cools, Kristof
Format: Article
Language:English
Subjects:
Composite structures
Conductors
Discrete systems
Domain decomposition
Domains
electromagnetic (EM) scattering
Electromagnetic scattering
Integral equations
Junctions
Magnetic domains
Magnetic resonance
Magnetoacoustic effects
Mathematical models
multitrace formulation (MTF)
preconditioning
Resonance
Resonance scattering
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Description
Summary:Global and local multitrace formulations (MTFs) provide a flexible and efficient method for the modeling of scattering and transmission of time harmonic electromagnetic (EM) waves by composite structures. This contribution extends the domain of applicability of global MTFs to cases where penetrable domains, perfectly conducting domain, and perfectly conducting thin sheets are all part of the design. A novel and easy to implement resonance-free equation to model scattering by perfect conductors is introduced. A Calderón preconditioner designed to limit the number of iterations required for the solution of the discrete system is designed and studied. The accuracy, flexibility, and efficiency of the method are demonstrated on a representative range of examples.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3187606