Patent Number: 048250902
Section: abstract

An EMI/RFI radiation and static electricity suppression device for shielding radiation from various electronic and electrical sources. The suppression device includes a shielding membrane having the waveguide barrier with a multiplicity of protrusions facing the radiation emitting source for minimizing reflection of electromagnetic radiation incident thereupon. A plurality of conductive layers are each separated by spacers formed of a radiation absorbing media. The conductive layers include an inner-mesh disposed adjacent to the waveguide barrier and adapted for blocking low frequency radiation. A deflection layer formed of a multiplicity of spaced apart metallic deflection pads is provided for deflecting incident radiation thereabout. An absorption funneling layer disposed behind the deflection layer includes a plurality of apertures designed to receive the deflected radiation. A reflecting plate disposed behind the absorption funneling layer works in combination with the absorption funneling layer to trap radiation and cause its ultimate absorption in an absorptive region therein. Each of the conductive layers is connected to a common electrical ground. Impinging electromagnetic radiation emanating from a device may be effectively shielded with such a construction and electrostatic field build-ups are eliminated.