A characteristic mode basis function method for solving wide-angle electromagnetic scattering problems

Pan Wang, Zhonggen Wang, Yufa Sun and Wenyan Nie

Journal of Electromagnetic Waves and Applications, 2022, vol. 36, issue 14, 1968-1979

Abstract: In the characteristic basis function method (CBFM) for the wide-angle electromagnetic scattering problems of electrically large objects, the low generation efficiency, and many characteristic basis functions exist due to the dependence on external excitation. This paper proposes a characteristic mode basis function method (CMBFM) with novel basis function construction to address this issue. In CMBFM, characteristic modes of each extended block obtained by dividing objects are calculated separately, and then the effective modes are selected as basis functions according to the modal significance. Compared with CBFM, the time performance of constructing basis functions is improved significantly. Furthermore, fewer basis functions are generated without a loss of accuracy. The corresponding numerical results demonstrate that significant efficiency and accuracy can be achieved by the proposed approach.

Date: 2022
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DOI: 10.1080/09205071.2022.2051211

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