Data Acquisition Systems for Magnetic Shield Characterization

摘要: The purpose of an EM shield is to prevent undesired electromagnetic coupling between source and a susceptible device. mechanism by radiation, inductive capacitive coupling. radiation energy waves characterizes the in far field region, while (or lowimpedance) high-impedance) couplings are driving near region. In all cases, complete analysis shielding performances should require full-wave solution problem. This means solve classical eddy current problem presence magnetically permeable materials shall combine Maxwell’s equations with magnetic properties shield. Numerous studies problems can be found literature showing how this topic has been subject great interest scientific community for many years (Moser; 1988; Schelkunoff; 1943; Schulz et al.; 1988). Several analytical numerical techniques have developed during especially advent proliferation electronic devices. Different wide range electrical used applications. As matter fact, accurate knowledge material important task correct modeling design phase. Further, shields different shapes contain apertures these parameters influence effectiveness, thus susceptibility combined shieldelectronic equipment system. first part, chapter reports on basic aspects theory standard measurement methods effectiveness frequency time domain. Concepts discussed reference configurations following relevant standards (IEEE Std 299; 2006). A configuration experimental setup instrumentation chain measurements reported.