中文摘要：

设计了圆环单元频率选择表面（FSS）,利用谱域法对包含有圆环单元FSS的吸波材料进行了仿真研究.结果发现圆环单元FSS极大拓展了吸波材料带宽,降低了共振频率的反射率;并且吸波材料带宽随单元半径增加而增大,共振频率向低频漂移,为FSS在吸波材料中应用提供理论依据.

英文摘要：

Frequency selective surface（FSS） is a two-dimensional array structure,which can be used to improve the performance of radar absorbing materials.We design circular unit of FSS,and give a simulation research on the circular unit of FSS with the spectral domain approach.The result shows that the circular unit of FSS greatly widens the bandwidth of radar absorbing materials,and decreases the reflectivity of resonance frequency;the bandwidth of radar absorbing materials increases with the increasing radius of the unit,and the resonance frequency drifts to low frequency,which provides theoretical support to the application of FSS in wave absorbing materials.