Patent ID: 8599576

Claim:
A shielding arrangement for an electronic device, the shielding arrangement comprising: a metallic enclosure having an interior volume, the interior volume defining a protected portion and an unprotected portion separated by an electromagnetically shielding barrier, the metallic enclosure having a portal providing access to at least the protective portion, the portal including an access opening, a shielding cover sized to cover the access opening, and an electromagnetically sealing gasket positioned around a perimeter of the access opening; an electrical filter positioned at least partially within the unprotected portion and along the electromagnetically shielding barrier, the electrical filter configured to dampen and diminish electromagnetic signals outside a predetermined acceptable range; a power filter positioned at least partially within the unprotected portion and along the electromagnetically shielding barrier, the power filter configured to receive an unfiltered power signal from external to the metallic enclosure and pass a filtered power signal through the electromagnetically shielding barrier to the protected portion; a waveguide beyond cutoff positioned along the barrier and configured to allow optical signals of a predetermined frequency pass from the unprotected portion to the protected portion; and one or more vents through the metallic enclosure and allowing airflow from external to the enclosure to pass into at least one of the protected portion and the unprotected portion, the vents each formed of a waveguide beyond cutoff having one or more apertures configured to shield the interior volume from exposure to electromagnetic signals exceeding a predetermined acceptable magnitude and frequency.