Home > Application Highlights: Shielding Effectiveness of RFI/EMI Fingerstock Minimizing the Effects of Openings

The shielding effectiveness of an enclosure is a function of the involved frequency wavelength versus the longest dimension of the opening. A common example is the seam gap between door and sash of an electronic cabinet.

Shielding Effectiveness vs. Frequency

As a function of aperture length

Based on the above information, shielding effectiveness is determined more by openings rather than the shield materials. The opening around the perimeter of larger components, such as doors, vents, access panels and viewing apertures, present the greatest effect on the shielding and are the most difficult to seal. There are basically two ways to electrically connect the mating surfaces; first, by reducing the slot length through the use of conductive fasteners or welding at close intervals, second, through the use of RF gaskets to seal the opening. For additional information, please contact our Customer Service Department.

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Inches Millimeters

Gap: The space between mounting and mating surfaces when in the compressed position.

Gap Size:

Mount Size: The amount of available space for mounting the part, including space for expansion of product when compressed.

Mount Size:

Mount Method: The desired method of attachment (i.e. clip-on, transfer adhesive, conductive transfer adhesive, solder, weld, or the use of hardware)

Mount Method: -- Mount Method --

Resources

• Conductive Adhesive Transfer Tape
• Pressure Sensitive Adhesive Transfer Tape
• Copper Beryllium
• Copper Nickel Tin
• Kimmel Gerke Associates, Ltd.
• IEEE
• RoHS

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