Shielding Effectiveness of an Enclosure With Finite Wall Thickness and Perforated Opposing Walls at Oblique Incidence and Arbitrary Polarization by GMMoM

An efficient and accurate technique based on a modal method of moments (MoM) is introduced to evaluate shielding effectiveness (SE) of a rectangular enclosure with apertures at opposing walls. The perforated walls are obliquely illuminated by arbitrary polarized incident plane waves. This technique takes the effect of the perforated wall thickness into account as well. The method is validated by comparing the results with measurements and fully numerical methods for an enclosure with various apertures illuminated by an arbitrary incident plane wave. It is shown that wall thickness affects SE for different polarized incident waves.