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从传统的频率选择选择表面(frequency selective surface,简称FSS)Y孔单元出发,提出了一种新单元.经优化设计,给出了Y孔单元和新单元的FSS结构参数,运用谱域Galerkin法对两种单元FSS的传输特性进行了数值计算.采用镀膜和光刻技术制作出相应的等效平板样件,在微波暗室对两种FSS等效平板在8—12GHz频段内的传输特性进行了测试,测试值与计算值基本一致.结果表明:与Y孔单元相比,新单元FSS在电磁波大角度(66°)入射时具有高的透过率,在电磁波大扫描角范围内(0°—66°)新单元FSS中心频率的漂移量更小.因此,所提出的新单元更适合于电磁波大角度入射下的应用,为FSS在曲面雷达罩上的应用提供了一种新单元.
Based on the traditional frequency selective surface (FSS) Y-cell, a new element is proposed.After optimization design, the FSS structure parameters of Y-cell and new element are given. By using the Galerkin method The transmission characteristics of two FSS units were numerically calculated.The corresponding equivalent plate samples were fabricated by coating and photolithography technology and the transmission characteristics of the two FSS equivalent plates in the 8-12GHz band were tested in a microwave anechoic chamber The results show that the FSS of the new unit has a high transmittance at a large angle (66 °) of electromagnetic wave when compared with the Y-hole unit, and has a high transmittance in the range of 0 ° -66 °), the new unit has a smaller drift of FSS center frequency.Therefore, the proposed new unit is more suitable for the application of electromagnetic waves at high angle of incidence, which provides a new unit for FSS application in curved radomes.