Study on absorbing wave of Fe3O4/MWCNTs nanoparticles based on large-scale space

Research on electromagnetic stealth technology has always been one of the research hotspots. Combining the advantages of the coating absorbing model (millimeter thickness) and the structural absorbing model, the absorbing model of the nanoparticle distribution in the large-scale space (meter-scale thickness) is established. The smoke cloud clusters are applied by three different scales of 7 kg, 13 kg and 100 kg to produce space filled with Fe3O4/MWCNTs composite nanoparticles with dimensions of 3 m, 5 m and 11 m. The reflectivity R of the electromagnetic wave passing through the nano space is simulated by COMSOL software and compared with the reflectivity R ' calculated by the transmission line model. The results show that the reflectivity of the 3 m space generated by the 7 kg cloud explosion device is below - 10 dB in the 2-10 GHz frequency band, and the lowest value is - 73 dB. In the 5 m space produced by 13 kg cloud explosion device, the reflectivity value in the 2-6 GHz frequency band is below - 10 dB, and the lowest value is - 57 dB. The reflectivity of 11 m space produced by 100 kg cloud explosion device is between - 9.6 and 0 dB.