Portal de Periódicos da CAPES

Improvement of absorption performance for Co2Z barium ferrite composite by increasing the reflected electromagnetic wave from air–absorber interface

2013; Elsevier BV; Volume: 354; Linguagem: Inglês

10.1016/j.jmmm.2013.10.045

1873-4766

Tao Wang, Canyu Pan, Ying Wang, Guoguo Tan, Haoda Wang, Rui Li, Fashen Li,

Metamaterials and Metasurfaces Applications

Co2Z barium ferrite composite with the added graphite powder was prepared to increase the permittivity. The calculated results showed that the stronger reflection loss (RL) peak and the smaller absorber thickness were simultaneously achieved compared with the pure Co2Z barium ferrite composite with the same permeability but lower permittivity. The origin of the absorption peaks was discussed by quarter-wavelength cancellation. By measuring the reflection coefficient of the composites without (S11-OPEN) and with (S11-SHORT) a backed metal plate, the separated electromagnetic wave energy reflected at the air–absorber interface and the absorber–metal plate interface was achieved, and they were used to deeply investigate the reason of the RL enhancement.