| Abstract:In order to develop a lightweight thin layer wideband absorbing material, an ultra-thin carbon glass paper was prepared by
paper making method. The carbon glass paper containing conductive carbon fiber was used as the electric loss layer and the
Polymethacrylimide (PMI) foam medium layer was used as the matching layer, the above two layers were alternately bonded into a
multilayer composite absorbing material. The reflectivity performance of the material was explored through dielectric constant testing,
reflectance simulation calculation, reflectance measurement, and anisotropy study of the material reflectance. The results show that the
reflectance simulated by the free space method is basically consistent with the measured reflectance. The multilayer carbon-based materi?
als with impedance matching design all show excellent radar wave absorbing performance. The reflectance of the materials is less than
-10dB at 8 to 18GHz, and the wave absorbing efficiency is greater than 90%. The best absorption performance is achieved when the thick?
ness of PMI foam is 2mm and carbon fiber content is 0.01%, 0.15 %, and 0.2%, respectively. The maximum reflectance is -28.03dB@
15.73GHz. The short carbon fiber is evenly dispersed in carbon glass paper, and the material reflectance anisotropy is small. |
