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设计了一种基于Y型的带阻型小型化频率选择表面,其单元的等面积正方形尺寸仅为0.057λ0×0.057λ0,厚度仅为0.021λ0。新型单元通过对传统Y型结构的分支向内进行规则的弯折来增大Y型单元的臂长,增加单元的谐振长度,从而增大了单元的等效电感与电容,提升了空间利用率。单元面积的减少,提高了单元的小型化效果,同时减小了单元间的距离,使频率选择表面具有较好的角度稳定性。仿真和测试结果表明,这种小型化单元对于不同角度入射的TE和TM波都具有很好的稳定性,其单元面积比谐振频率相同的传统Y形单元的面积减小了约96.3%,具有良好的带阻特性。
A Y-based band-stop miniaturized frequency selective surface is designed. The square of the unit area is only 0.057λ0 × 0.057λ0 and the thickness is only 0.021λ0. The new unit increases the arm length of the Y-shaped unit by inwardly bending the branches of the conventional Y-shaped structure, increases the resonance length of the unit, thereby increasing the equivalent inductance and capacitance of the unit and improving the space utilization . The reduction of the cell area improves the miniaturization of the cell and at the same time reduces the distance between the cells so that the frequency selective surface has better angular stability. Simulation and test results show that the miniaturization unit has good stability for both TE and TM waves incident at different angles and has an area of about 96.3% smaller than that of a conventional Y-shaped unit with the same resonance frequency. Good barrier characteristics.