Xingcun Colin Tong's Advanced materials and design for electromagnetic PDF

By Xingcun Colin Tong

ISBN-10: 1420073583

ISBN-13: 9781420073584

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 a number of industries. targeting the practicalities of this sector, Advanced fabrics and layout for Electromagnetic Interference Shielding comprehensively introduces the layout directions, fabrics choice, characterization technique, production expertise, and destiny power of EMI shielding.

After an outline of EMI protective thought and product layout guidance, the ebook commonly reports the characterization method of EMI fabrics. next chapters concentrate on specific EMI defensive fabrics and part designs, together with enclosures, metal-formed gaskets, conductive elastomer and versatile graphite parts, conductive foam and air flow constructions, board-level protecting fabrics, composite fabrics and hybrid constructions, absorber fabrics, grounding and cable-level protective fabrics, and aerospace and nuclear protective fabrics. The final bankruptcy provides a viewpoint on destiny traits in EMI defensive fabrics and design.

Offering exact insurance on many vital issues, this necessary publication illustrates the potency and reliability of a number fabrics and layout suggestions for EMI protecting.

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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. In general, however, apertures should be smaller than l/50 and never bigger than l/20. To achieve acceptable attenuation values at a frequency of 100 MHz, typical for high-speed digital devices, apertures should not exceed 10 mm. The type of shielding used and how it is applied are determined to a large extent by the function of the aperture.

A waveguide has a cutoff frequency below which it works as an attenuator. The attenuation is a function of the length h of the waveguide. 34) where d is the diameter in meter, c is the speed of light in vacuum, and ε is the relative perttivity. 35) where w is the largest dimension of the waveguide cross-section in meters. 36) 10/10/08 10:56:37 AM Electromagnetic Interference Shielding Fundamentals and Design Guide 23 where d is the diameter and h is the length of the waveguide. 37) where w is the largest linear dimension of the waveguide cross-section and h is the length.

1992. EMC Electromagnetic Theory to Practical Design. Chichester: John Wiley & Sons. Chomerics. 2000. EMI shielding theory. pdf Christopoulos, C. 1995. Principles and Techniques of Electromagnetic Compatibility. Boca Raton, FL: CRC Press. CISPR11. 2004. Industrial, scientific and medical (ISM) radio-frequency equipment electromagnetic disturbance characteristics: Limits and methods of measurement. International Special Committee on Radio Interference. Duffin, W. J. 1968. Advanced Electricity and Magnetism.

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Advanced materials and design for electromagnetic interference shielding by Xingcun Colin Tong

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