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The phase of scattering fields by targets is studied using the computation accuracy results of finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) simulation, the high frequency method, and the analytical solution method. Series of numerical experiments proved that hybrid FE-BI-MLFMA technique is not only accurately computes the amplitude of scattering fields but also...
The hybrid finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) is applied to solve the challenge problem of scattering by a large body with deep cavities in this paper. The hierarchical higher order curvilinear vector finite element (HCVFE) is employed to reduce the numerical dispersion error in the FEM and to efficiently model the geometry of the cavity. The coupling...
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