Radiated fields from circuit components inside rectangular enclosures with apertures

The problems of predicting the radiated field coupling between circuit components inside nonideal shielded enclosures and the electromagnetic emissions radiated outside from circuit components inside such enclosures, are considered. The problems are formulated by representing the circuit components involved by one or more equivalent small antennas located inside the enclosure. The fields radiated by these unwanted antennas are coupled to the exterior via an aperture. The analytical model developed in this paper for predictions is based on dyadic Green's functions.