Design of a multilayer composite absorber working in the P-band by NiZn ferrite and cross-shaped metamaterial

摘要

An optimized NiZn ferrite absorber for the whole P-band (230-1000MHz) is proposed by inserting cross-shaped metamaterial. Effective absorption bandwidth below -10dB for the composite absorber covers the frequency range 210MHz-1000MHz. Electromagnetic wave attenuation mechanisms are revealed by surface current distribution and power loss density distribution. The increased absorption bandwidth of the composite absorber is attributed to the overlap effect ofthree absorption peaks originated from the multilayer cross-shaped metamaterial absorbers. Results indicate that the proposed composite absorber can be utilized in the P-band with relatively less thickness compared to the traditional NiZn ferriteabsorber.