EMI/RFI Interference Analysis and Cable Shielding Selection BEST PRACTICES
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Electromagnetic compatibility in wire cabling and flex circuits results from appropriate material selection, coverage, and shielding performance Legacy QQ-B-575 Shield Braid is suitable for general-purpose aerospace applications and is manufactured from copper wire, conductively plated with tin, silver, or nickel. A high-strength tin-plated copper-clad steel braid is available, well- suited for H-field shielding. Stainless steel versions provide improved corrosion resistance and high temperature tolerance. 1 ArmorLite ™ is a weight-saving, flexible material with virtually no “windowing”, that delivers superb optical braid coverage—typically between 85 and 90%, shielding between 80 and 40 decibels in the 100Khz to 1Ghz range. ArmorLite offers complete 2 Aluminum wrapping and braided shielding are both used to effect a Faraday cage to enclose interconnect wires and cables. Elimination of apertures or gaps in shielding is critical, especially for high-frequency (short wavelength) EMI. Foil wrapping provides high-frequency protection with 100% optical coverage, while braided shielding offers 90-95% optical coverage with greater flexibility and ease-of-installation. 3 compatibility with aerospace lightning strike requirements as well as FAA abrasion and burn resistance standards, and is temperature-tolerant from -80˚ to 260˚C.
QwikConnect • April 2021
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