Patent ID: 6018125
Filing Date: 2000-01-25
Classification: G11B,H05K

Abstract:
An EMI shielded enclosure for shielding electrical equipment outside the enclosure from electromagnetic radiation originating from a source within the enclosure, said enclosure comprising:a plurality of electrically conductive walls, said walls being electrically connected so electromagnetic radiation from within the enclosure cannot radiate through the walls;at least one of the walls of the enclosure being electrically non-conductive plastic and having a thickness T;waveguide attenuating holes molded to extend through said non-conductive wall of the enclosure providing for air flow into and out of the enclosure, the waveguide attenuating holes; andsaid waveguide attenuating holes attenuating electromagnetic radiation passing from inside the enclosure through said holes to outside the enclosure, attenuation provided by the waveguide attenuating holes proportional to 32 times T/D.