Shielding effectiveness studies of rectangular enclosures with apertures against EM fields with arbitrary angles of incidence and polarizations

This paper discusses the shielding effectiveness of metallic enclosures with rectangular apertures against arbitrarily polarized oblique incident plane waves using Modal MoM according to Deshpande et al.(1999). The results show that for a given angle of incidence and polarization, the SE values are different at different points inside the enclosure. The results also show that the polarization of the incidence waves as well as the angle of incidence have a profound effect on shielding effectiveness. Also the SE values for each component of E field has to be taken into account as the normal incidence for a particular component at a location inside the enclosure may not be the worst case. The study emphasizes the need for the statistical estimation of the shielding effectiveness of the rectangular enclosures.