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Curved parametric hexahedron with 20 geometric interpolation nodes is used as basic building block for modeling of 3-D electromagnetic structures of arbitrary shapes in the spectral-element time-domain (SETD) method. By mean of this curved parametric hexahedron, the mass matrix is block-diagonal and the dimension of each block is no more than six. When a central difference scheme is employed for time...
Anisotropic perfectly matched layer is introduced in spectral-element time-domain method (SETD) as an absorbing boundary condition. By the use of PML, the SETD keeps the diagonal characteristic in mass matrix. So the updating of electromagnetic field is fully explicit when a central difference scheme is employed for the time discretization. Several numerical results have been shown that the use of...
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