Patent ID: 7039361
Filing Date: 2006-05-02
Classification: H04B,Y10T

Abstract:
1. A low radio frequency emissions network device, comprising: a chassis; a network device component disposed within said chassis, said network device component emitting electromagnetic interference; a layer of foam having a predetermined insertion loss in the frequency range of electromagnetic interference disposed on at least a portion of a surface of said network device, said layer of foam substantially covering an inner surface of said chassis, wherein said layer of foam is disposed in proximity to said network device component, wherein said layer of foam is approximately 0.25 inches in thickness, absorbs electromagnetic interference, and prevents a predetermined amount of electromagnetic interference from exiting said chassis and interfering with said network device, wherein said layer of foam is doped to increase the insertion loss of said layer of foam in the 1–10 GHz range, said network device component comprising at least one integrated circuit emitting electromagnetic interference, said at least one integrated circuit having a heat sink, wherein said layer of foam is disposed directly on top of said heat sink; and a Faraday cage, wherein said layer of foam is provided outside of said Faraday cage.