Using fictitious domain method with a time domain discontinuous galerkin formulation. application to antenna modelisation.

In this paper, we present a fictitious domain method based on a discontinuous Galerkin Time-Domain (DGTD) formulation for time dependent Maxwell's equations applied to electromagnetic scattering by a perfect conductor. This method allows to take into account the geometry of metallic structures with structured Cartesian grid and without staircasing effects. Moreover, a DGTD method is perfectly adapted to the use of local subgridding and to calculate the main characteristics of antennas, such as impedances, electric and magnetic currents at the same time and localisation, radiation patterns.... [3].