Electromagnetic interference waveguide shield with absorber layer
AssigneeIntel Corporation
InventorsSteve Y. Chang, Steven Y. Ji, Harry G. Skinner, Howard L. Heck
Life of this patent
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Abstract
A waveguide shield for containing electromagnetic interference (EMI) is disclosed. The waveguide shield includes an array of waveguide cells. Each waveguide cell has a contiguous inner surface coated with an absorber layer that absorbs EMI over a select frequency range. Each waveguide cell also has an aperture. The waveguide shield can be combined with a metallic chassis covering portions of a computer that generate the EMI and heat. The absorber layer allows the waveguide cells to have apertures of a size that can contain the EMI within the chassis while also allowing the heat trapped within the chassis to escape.
Claims26
An electromagnetic interference (EMI) shield comprising:
- a waveguide body including an array of waveguide cells each having a contiguous inner surface;
- and
- an absorber layer covering at least a portion of each contiguous inner surface and capable of absorbing electromagnetic radiation over a select frequency range.
An electromagnetic interference (EMI) shield, comprising:
- an array of waveguide cells each having a contiguous inner surface;
- an absorber layer covering at least a portion of each contiguous inner surface, the absorber layer capable of absorbing electromagnetic radiation over a select frequency range.
An electromagnetic interference (EMI) shield for a computer, comprising:
- a metal chassis having an aperture, the chassis adapted to enclose portions of the computer that generates heat and EMI over a select frequency range;
- and
- an EMI waveguide shield fixed to the chassis and covering the aperture, the EMI waveguide shield including an array of waveguide cells each having a contiguous inner surface, and an absorber layer covering at least a portion of each contiguous inner surface, the absorber layer capable of absorbing the EMI.
A method of reducing electromagnetic interference (EMI) from a computer, comprising:
- enclosing portions of the computer that generate heat and EMI over a select frequency range with a metal chassis having an interior;
- introducing the EMI and heat to an array of waveguide cells fixed to the chassis, each waveguide cell having an aperture leading from the interior and a contiguous inner surface at least partially coated with an absorber layer that absorbs the EMI over the select frequency range;
- and absorbing the EMI with the absorber layer to substantially contain the EMI within the interior, while allowing the heat to pass from the interior through each aperture.
Dependencies are inferred from the claim text.