A Novel Structure of Woven Continuous-Carbon Fiber Composites with High Electromagnetic Shielding

摘要

A novel structure employing the woven continuous-carbon fiber(CCF)epoxy composite with high electromagnetic(EM)shielding is presented experimentally and theoretically.The influences of weave type,number,and angle of overlapped plates upon the shielding effectiveness(SE)of the woven CCF-epoxy composite are investigated.The minimum SE of the single,double,and triple-plain or balanced-twill woven CCF-composite plates was measured to be as high as 50 dB,60 dB,and 70 dB,respectively.More than 100 dB in SE was obtained for the triple-overlapped,plain-weave CCF composite at a frequency of 0.9 GHz.The weight percentage of the single CCF-composite plate required for electronic application is 4.8% only,which is less than one quarter of the CF content,and the performance in SE is 10 dB higher in comparison with long,CF-filled,liquid-crystal polymer(LCP)composites.The SE calculated theoret-ically is consistent with that measured by the experiment.