Electromagnetic interference attenuation device
AssigneeThe Curran Company
InventorsWilliam E. Curran, Sr., Michael T. Egan, Joseph C. Weibler
Life of this patent
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Abstract
An EMI attenuation device including at least two substrates such that the spacing between these substrates is selected to maximize shielding performance at a particular frequency. The device further includes additional substrates arranged at predetermined distances from the first two substrates to optimize shielding performance. A method also is provided for a multi-step, attenuation of impinging EMI, wherein the method also enables see-through and/or hear-through monitoring. Salient features of the method include relatively positioning a plurality of electrically conductive substrates, each of a particular topology, so as to maximize attenuation of the EMI at particular frequencies.
Claims25
An EMI attenuation device comprising:
- a.) a first electrically conductive planar member spatially positioned adjacent to and at a first distance from a second electrically conductive planar member;
- and
- b.) a third electrically conductive planar member spatially positioned adjacent to and at a second distance from said second member;
- with the first and second distances selected so that when the first distance induces resonance to impinging radiation, the second distance cancels the resonance.
A device for attenuating impinging electromagnetic interference radiation comprising:
- a.) a first defined space having a plurality of walls configured from first and second electrically conductive shielding means;
- b) a second defined space having a plurality of walls configured from said second electrically conductive shielding means and a third electrically conductive shielding means;
- and
- c) means for positioning said first, second and third shielding means whereby distances between adjacent walls of said first and second shielding means are dissimilar to corresponding collinear distances between adjacent walls of said second and third shielding means, with said spaces so selected that when the first defined space produces a resonance to the impinging radiation, the second defined space cancels the resonance.
Dependencies are inferred from the claim text.