Screen efficiency is analysed
[introduction] screen efficiency behaved shield the attenuation degree to electromagnetic wave. Can go to the intensity attenuation of electromagnetic wave normally as a result of shield original 1% to extremely one of, because this connects commonly used decibel (DB) will state. The screen efficiency of general shield can amount to 40 DB, the screen efficiency of the shield of equipment of for military use can amount to 60 DB, the screen efficiency of the shield of TEMPEST equipment can amount…