A Modular Approach To Assess Em Coupling Into Housings Through Small Apertures

Abstract

_—The coupling into cavities through apertures depends on several parameters as the size and shape of the cavity, position and size of the apertures, and the incident field. Amongst these, the position of the aperture on a cavity wall is of major importance for a given cavity. We present a modular method to efficiently compute the coupling even for various configurations by separating interior and exterior and using in each domain the most efficient method. Whereas the coupling is computed for small apertures, the method remains applicable to larger apertures. An exemplary computation of the coupling to strip type objects inside a cavity through an aperture at four characteristic locations shows the applicability of the method and the large influence of the aperture position on the electromagnetic field inside the cavity.