On the FEM Modal Approach for a Reverberation Chamber Analysis

Abstract : We review the difficulties of a modal approach when modeling a Reverberation Chamber (RC) by the Finite Element Method (FEM). The numerical challenge is due to the large scale problem involved by the over-dimensioned cavity. Moreover, the field singularity on the stirrer has to be captured by the FEM. First the following issues are discussed: existence of null-frequency solutions, convergence rate for h and p adaption, and formulation type in E or H field. Then the modal analysis is compared to the classical harmonic one. A focus is put on the field singularity at the source point.
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Gerard Orjubin, Elodie Richalot, Stéphanie Mengué, Wong Man-Fai, Odile Picon. On the FEM Modal Approach for a Reverberation Chamber Analysis. IEEE Transactions on Electromagnetic Compatibility, Institute of Electrical and Electronics Engineers, 2007, 49 (1), pp.76-84. ⟨http://ieeexplore.ieee.org/abstract/document/4106098/⟩. ⟨10.1109/TEMC.2006.888187⟩. ⟨hal-01441548⟩

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