A Study of Techniques for Measuring the Electromagnetic Shielding Effectiveness of Materials

摘要: Abstract: Shielding effectiveness relates to a material's ability reduce the transmission of propagating fields in order electromagnetically isolate one region from another. Because complex shielding capability is difficult predict, it often must be measured. A number measurement approaches are studied including use shielded room, coaxial line holders, time domain signals, dual TEM cell, and an apertured cell reverberation chamber. In each case, we consider system's frequency range, test sample requirements, field type, dynamic required, analytical background, present data taken on common set materials.