Excitation by Scattering/Total Field Decomposition and Uniaxial PML in the Geometric Formulation

This paper presents a general technique to apply excitations in the framework of discrete geometric numerical methods using dual grids, such as discrete geometric approach and finite integration technique. The technique overcomes some limitations of the impedance boundary condition we proposed in a previous work, especially when dealing with waveguides, where specific excitation modes must be applied. The proposed approach is based on a scattering/total field decomposition, which, if needed, allows to study scatterings due to objects.