If not, microwave ovens, mobile phones are how to shield the electromagnetic wave of the phone?
When the interference of electromagnetic wave in low frequency, using high permeability material, so that the magnetic shielding limit in the internal space to prevent the spread of the shield.
When the frequency of interference electromagnetic field is higher, the eddy current generated by the low resistivity metal material is used to counteract the electromagnetic wave, so as to achieve the shielding effect
Of course, the conductive metal can produce electromagnetic wave reflection, absorption, and offset, and so on, so as to play a role in reducing electromagnetic radiationOf course, not just any metal can play a shielding:
