The prevention of reflections from the edge of the computational domain is a challenge incomputational electromagnetics. Although ways exist to absorb/negate such reflections, we recently proposed an entirely different strategy. Based on a representation in the spectral domain, we analytically represent waves on the entirety of space, but with accuracy focused only on a certain region. Therefore, we can employ formulations without worrying about boundary conditions. We show several examples of this technique, including simulationsin layered media.
Dilz et al. (Fri,) studied this question.