【摘要】 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.更多还原

【Abstract】 Based on the Y element, a novel element for the Frequency selective surface (FSS) is presented in this paper. The transmission characteristics of Y element FSS and the novel element FSS is calculated using Galerkin’s method in the spectral domain, and the optimum parameters of the FSS is obtained. The corresponding equivalent FSS sample plate was fabricated. It’s transmission characteristics were measured by microwave network analyzer at 8—12GHz. The agreement between the calculated and measured values was good. The results show that, the novel element FSS has excellent transmission characteristic at large-angle incidence, the transmission coefficient is -0.52dB at TE 66° incidence. From 0° to 66° TE incidence, the drift of the resonant frequency is 200MHz. Meanwhile the transmission coefficient of Y element FSS is -0.82dB at TE 66° incidence, and from 0° to 66° TE incidence, the drift of the resonant frequency is 400MHz. Therefore, the novel element FSS is more suitable than Y element FSS for the application in large-angle incidence curved streamlined radome.更多还原