Radar absorbing property in eight millimetre wave of MWCNTs/GF/epoxy composites

As a new kind of radar absorbing material, carbon nanotubes show an excellent wave absorbing property in a wide frequence range because of their special structures and electromagnetic properties. Moreover, they have other characteristics such as light weight and good stability, so they are considered to be promising. In this paper, the radar absorbing property was studied for MWCNTs/GF/epoxy composites in millimeter wave (from 26.5 to 40.0 GHz) with the same thickness and different contents of MWCNTs or different thickness and the same content of MWCNTs. The results show that the radar absorbing property of this kind of composites is improved with increasing the content of MWCNTs. The outstanding radar absorbing property of MWCNTs/GF/epoxy composites is due to not only the radar absorbing property of MWCNTs, but also the resonant absorbing property of composites. The test results calculated with electromagnetic parameters such as relative dielectric parameter and relative magnetic conductive ratio of this kind of composites are in agreement with the absorbing theory.