THE WAVE-ENVELOPE METHOD AND ABSORBING BOUNDARY-CONDITIONS

An absorbing boundary condition (ABC) is an effective way to truncate the domain of an unbounded electromagnetic scattering problem, to allo w it to be solved by the finite element method. However, the boundary on which the ABC is imposed must be separated from the scatterer by a thick layer of space, which can be expensive to model with conventiona l finite elements. The Wave-Envelope (WE) Method is here used to model the layer of space much more cheaply. Results demonstrate the accurac y and efficiency of this approach.