FeCoNi-Coated Glass Fabric/Polycarbonate Composite Sheets for Electromagnetic Absorption and Shielding

In order to evaluate the electromagnetic (EM) absorption and shielding effects in near-field and far-field regions, the FeCoNi-coated glass fabric/polycarbonate composite sheets were fabricated. The composite sheets were composed of the laminated structure, which has one or two ply-FeCoNi-coated glass fabrics with or without Ni grid in polymer matrix. The evaluation of EM absorption and shielding behaviors was measured by using a microstrip line and a shielded loop antenna, which is based on IEC62333 in near field and rectangular waveguide at the X-band region in the far-field region. The power absorptions were up to about 86% at 10 GHz. The inter-decoupling effect for FeCoNi-coated glass fabric with Ni grid in composite exhibited about 45 dB at around 1.3 GHz, which is comparable to that of a conductive Cu foil. The shielding effectiveness was obtained over 70 dB at the X-band region for FeCoNi-coated glass fabric with Ni grid composite sheets.