Device for attenuating propagation and reception of electromagnetic interference for a PCB-chassis structure
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United States of America Patent
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Jul 21, 2015
Grant Date -
Jan 29, 2015
app pub date -
Jul 23, 2013
filing date -
Jul 23, 2013
priority date (Note) -
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Abstract
A first substantially annular conductive material has a first central opening, the first central opening is sufficient to substantially surround a fastener and maintain an electrical connection between the printed circuit board and the chassis. A second substantially annular conductive material is concentric with the first conductive material and the second conductive material hays a second central opening which is sufficient to substantially surround the fastener and maintain the electric connection between the printed circuit board and the chassis. A substantially annular impedance material is between and adjacent to the first conductive material and the second conductive material, the impedance material is sufficient to attenuate the electromagnetic interference from the system.
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