Download Advanced materials and design for electromagnetic by Xingcun Colin Tong PDF

By Xingcun Colin Tong

With electromagnetic compliance (EMC) now a significant component within the layout of all digital items, it's important to appreciate how electromagnetic interference (EMI) protecting items are utilized in numerous industries. targeting the practicalities of this quarter, Advanced fabrics and layout for Electromagnetic Interference Shielding comprehensively introduces the layout directions, fabrics choice, characterization method, production know-how, and destiny power of EMI shielding.

After an summary of EMI defensive thought and product layout guidance, the booklet widely reports the characterization technique of EMI fabrics. next chapters specialize in specific EMI protecting fabrics and part designs, together with enclosures, metal-formed gaskets, conductive elastomer and versatile graphite elements, conductive foam and air flow buildings, board-level protecting fabrics, composite fabrics and hybrid constructions, absorber fabrics, grounding and cable-level protective fabrics, and aerospace and nuclear defensive fabrics. The final bankruptcy offers a viewpoint on destiny developments in EMI protecting fabrics and design.

Offering specific insurance on many vital subject matters, this fundamental booklet illustrates the potency and reliability of quite a number fabrics and layout recommendations for EMI protecting.

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Extra resources for Advanced materials and design for electromagnetic interference shielding

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Here the calculated shielding effectiveness values basically indicate best-case shielding effectiveness since they do not include the effects of apertures or other discontinuities. These discontinuities account for most of the leakage in a shielding enclosure. As it is not practical to build an all-welded enclosure, most enclosures require various openings for controls, access panels, ventilation, viewing, and so forth. 2 EMI Gasket The function of an EMI gasket is to preserve continuity of current flow in the gap or slot of a shield.

Indd 20 10/10/08 10:56:36 AM Electromagnetic Interference Shielding Fundamentals and Design Guide 21 Conductive panel with apertures. 25) where w and h are slot width and height in mm; and t is the depth of slot, usually thickness of material in mm. 26) where w is length of slot (meters) and w > h and w >> t; l is wavelength in meters; and n is number of apertures within l/2. 28) where d is diameter in mm; t is the depth of hole, usually thickness of material in mm. 29 can be solved in terms of width (w) or diameter (d) to determine what size aperture is required for a given attenuation.

Montrose, M. I. 1999. EMC and the Printed Circuit Board. New York: Institute of Electrical and Electronics Engineers. Nave, M. J. 1991. Power Line Filter Design for Switched-mode Power Supplies. New York: Van Nostrand Reinhold. Ott, H. 1988. Noise Reduction Techniques in Electronic Systems, 2nd ed. New York: John Wiley & Sons. Pozar, D. M. 1988. Microwave Engineering, 2nd ed. New York: John Wiley & Sons.

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