Transcription of Engineering Aspects of Electromagnetic Shielding
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Engineering Aspects of Electromagnetic Shielding
Engineering Aspects of Electromagnetic ShieldingDr. Sergiu RaduPrincipal Engineer, EMC Design Sun Microsystems, Introduction: Electric, Magnetic and Electromagnetic Shielding Basics approaches to Shielding : field theory (Kaden) and circuit theory (Schelkunoff) Limits of the theoretical approaches: numerical simulations Practical Aspects of Shielding , typical requirements, grounding scheme Shield material: metal, plastic, typical coatings Shield construction: rivets, joints, seams, apertures Shielding and thermal issues: holes, perf patterns, honeycomb Shield integrity and gaskets Internal compartmentalization of a chassis, resonances Practical Aspects of source - aperture coupling Shielding for radiated emissions, radiated immunity and ESD - reciprocity Aspects and limits Evaluation of Shielding effectiveness3 Introduction In order to have an EMI problem we must have.
2 Outline Introduction: Electric, Magnetic and Electromagnetic shielding Basics approaches to shielding: field theory (Kaden) and circuit theory (Schelkunoff)
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