7Lee C Y,et al.Conductivity and EMI shielding eficiency of polypyrrole and metal compounds coated on (non)woven fabrics[ J].Synthetic Metals,2001 (119):429-430.
4Bouwkamp C J.On bethe 5 theory of diffraction by small holes[J].Philips Research Reports,1950,5(5):321-332.
5XU Yun-zhi. The effect of apertures on the electromag- netic shielding effectiveness of electronice case [ J ]. In- dustry and Mine Automation,2008 (1) :36 -37.