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Analysis of the coupling of an incident wave with a wire inside a cavity using an FEM in frequency and time domains

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3 Author(s)
Carpes, W.P., Jr. ; Departmento de Engenharia Eletrica, Univ. Fed. de Santa Catarina, Florianopolis, Brazil ; Pichon, L. ; Razek, A.

This paper presents a numerical method based on finite elements in both the frequency and time domains for modeling the coupling of an incident wave with a conducting wire placed inside a metallic cavity having a small aperture. The method uses edge elements on tetrahedra for the electric field representation. The formulation can take into account thin wires as well as lumped elements. In the time-domain approach, the time derivatives are discretized by the Newmark method, which allows obtaining an unconditionally-stable scheme with second-order accuracy. Numerical results are provided to validate the presented method.

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:44 ,  Issue: 3 )