多层频率选择表面复合吸波结构的研究

Research on Composite Absorber Structure of Multilayered Frequency Selective Surface

文中采用一种快速求解方法——半解析半数值法计算多层频率选择表面(Frequency Selective Surface,简称FSS)复合结构的反射系数,然后结合具体两层复合结构的实例通过测试验证了半解析半数值法的正确性,并基于复合结构吸波材料吸波频带窄的缺点,在此基础上,设计出一种新的圆形FSS复合结构吸波材料。计算和测试结果都表明,这种新的复合结构在较宽带宽内具有低反射系数。

In this paper, a fast semi-analytical and semi-numerical method was adopted to calculate the reflection coefficient of multilayer FSS-embedded composite structure. For a two-layer composite structure absorbing material, the reflection coefficient was calculated and measured, and the measuring result verified the correctness of fast method. Since the two-layer composite structure absorbing material has narrow absorbing bandwidth, a new FSS-embedded composite structure absorbing material based on the two layer composite structure was designed. The reflection coefficient of new structure was calculated and measured, and both results show that new structure has low reflection coefficient in wide bandwidth.