Integral Equation Macromodel of a Cavity-Backed Aperture

In the paper the idea of integral-equation based macromodels is applied to account for cavity-backed slots made in an infinite metal screen. The problem is formulated using the method-of-moments (MoM) accelerated by the asymptotic waveform evaluation (AWE) technique, however instead of solving it for a given environment above the aperture, and for a given excitation, we combine the procedure with the domain decomposition technique (DDM) in order to get re-usable, versatile macromodels.