基于超材料设计的钡铁氧体吸波涂层研究

Barium ferrite microwave absorbing coating based on metamaterial design

本工作设计了一种基于超材料结构的钡铁氧体吸波涂层,分析了超材料的结构设计对钡铁氧体涂层吸波性能的影响,并对涂层的吸波机理进行了研究和讨论。通过仿真发现,钡铁氧体涂层经超材料设计改进后,吸波性能得到大幅增强,改进后的钡铁氧体涂层存在最佳的匹配厚度2.5mm和电阻膜方块电阻值70Ω/,此时涂层的吸收带宽最大,并存在两个吸收峰,在8～18GHz频段内反射损耗都小于-10dB。钡铁氧体通过超材料设计改进后,吸波性能得到极大改善。

A barium ferrite microwave absorbing coating based on metamaterial structure was designed.The influence of metamaterial structure on the absorbing properties of this coating was analyzed,and the absorbing mechanism of coating was studied and discussed.Through simulation,it is found that the absorbing properties of barium ferrite have been greatly enhanced with metamaterial structure.The optimum value of the coating thickness(2.5mm) and sheet resistance(70Ω/□) are unique,meanwhile,the widest absorbing bandwidth of the coating is achieved.There exist two absorption peaks and the reflection loss can reach -10dB within the frequency range of 8-18GHz.The results show that the absorbing properties of barium ferrite are improved immensely with metamaterial structure design.