Abstract-The total-field/scattered-field method, also called the Huygens surface method, is a common method to enforce an incident wave in a FDTD grid filled with a vacuum. In this paper it is shown that it can also be used in such dispersive media as the Debye media. The incident wave to be enforced on the Huygens surface is computed either by an analytical calculation in the general case or by means of the auxiliary grid technique in special cases. As in a vacuum, the leakage of energy outside the Huygens surface is lower than −40 dB with the analytical incident wave and it can be far lower with the auxiliary grid incident wave.
Abstract-An absorbing boundary condition is presented for the absorption of electromagnetic waves in dispersive media in problems where the frequency bandwidth of interest is limited. The condition relies on an operator designed to absorb the waves in the considered bandwidth. Numerical experiments demonstrate the effectiveness of the operator in Human Body media. Due to its simple implementation, the operator ABC may be an alternative to the PML in applications where the bandwidth does not exceed one or two decades of frequency.
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