基于方环形单元的新型频率选择表面设计

Design of New Structural Frequency Selective Surfaces Based on Square Ring

在传统方环形FSS结构基础上进行改进,设计出一种新型结构单元,并进行了实物加工与测试,结果表明,新型结构单元比传统结构拥有更好的频率选择特性。通过曲折线设计和加入垂直枝节,使整个新型单元结构尺寸降低为传统单元尺寸的28.6%左右,有效地实现了对FSS小型化设计。同时,新型单元在不同入射条件下,谐振频率漂移量维持在0.04 GHz左右,拥有较高的角度稳定性与极化稳定性。

A new structural unit was designed and manufactured based on the improvements to traditional frequency selective sur-face（FSS）of the square ring structure. Measured results and simulation results by Ansoft HFSS have shown that the frequency selectivi-ty of the new structure units is better than the traditional one. By zigzag line design and added vertical branches,the size of the entirestructure of the new unit reduced to 28.6%,which is very useful for miniaturization design of the FSS. Meanwhile,under different inci-dent conditions,the resonant frequency drift of the new unit is around 0.04 GHz,and a higher angular stability and polarization stabili-ty are accomplished.