New PDF release: Advanced materials and design for electromagnetic

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 will be significant to appreciate how electromagnetic interference (EMI) protective items are utilized in a number of industries. targeting the practicalities of this region, Advanced fabrics and layout for Electromagnetic Interference Shielding comprehensively introduces the layout instructions, fabrics choice, characterization technique, production expertise, and destiny power of EMI shielding.

After an outline of EMI protecting idea and product layout guidance, the e-book widely experiences the characterization technique of EMI fabrics. next chapters concentrate on specific EMI protecting fabrics and part designs, together with enclosures, metal-formed gaskets, conductive elastomer and versatile graphite elements, conductive foam and air flow constructions, board-level defensive fabrics, composite fabrics and hybrid buildings, absorber fabrics, grounding and cable-level defensive fabrics, and aerospace and nuclear defensive fabrics. The final bankruptcy provides a point of view on destiny developments in EMI defensive fabrics and design.

Offering certain assurance on many very important themes, this crucial publication illustrates the potency and reliability of quite a number fabrics and layout strategies for EMI defensive.

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Extra info for Advanced materials and design for electromagnetic interference shielding

Example text

The most common fillers are carbon fibers, nickel-coated graphite (NCG) fibers, stainless steel fibers, and aluminum fibers and flakes. The amount of fiber in the resin is usually between 7% and 20% of the total volume depending upon the level of shielding required. The conductive fibers offer good EMI shielding performance (20–60 dB). In plastics, the most efficient use of conductive fibers in the finished molded part is achieved through maintaining fiber length during processing. The longer the fibers in the resin matrix, the better the fibers overlap or network electrically.

3 Environmental Compliance Environmental compliance must be evaluated during EMI shielding design because it has become a key advantage of competitive shielding products. The requirements are regulated by the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) and Waste Electrical and Electronic Equipment (WEEE) Directives promulgated by the European Union (EU). The directives make selections of shielding materials critical. These environmental compliance regulations, together with existing requirements for EMC, provide forceful guidelines for designing products with EMC and environmentally compliant.

3 Multiple Reflection Correction Factor The factor B can be mathematically positive or negative (in practice it is always negative), and becomes insignificant when the absorption loss A > 6 dB. , below approximately 20 kHz). 3(μ/fr s) ; Zs is the shield impedance; and ZH is the impedance of the incident magnetic field. 15 with a combination of the related equations of absorption and reflection losses, as well as correction factor B. 10. These illustrations give a good physical representation of the behavior of the component parts of an electromagnetic wave.

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

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