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针对传统二维频率选择表面(FSS)滤波特性差、功率容量不高等局限,结合FSS设计方法及微波电路基础理论,提出了一种具有准椭圆滤波特性的波导型FSS结构。通过理论分析及全波仿真,详细分析了其工作机理。关于结构参数、结构形式、单元排布方式等对其特性影响的研究,有效地验证了理论分析,同时对其设计具有重要指导意义。结果表明,这种新型波导型FSS具有带宽宽、滤波特性好、结构简单、设计便捷、调节灵活等优点,对于FSS的设计及电磁脉冲防护等研究具有参考意义。
In view of the limitations of the traditional two-dimensional frequency selective surface (FSS) filtering performance and low power capacity, a FSS structure with quasi-elliptic filtering is proposed based on FSS design method and basic theory of microwave circuit. Through theoretical analysis and full-wave simulation, the working mechanism is analyzed in detail. The research on the influence of structure parameters, structure forms and arrangement of units has validated the theoretical analysis and has an important guiding significance for the design. The results show that this new waveguide FSS has the advantages of wide bandwidth, good filtering characteristics, simple structure, convenient design and flexible adjustment. It has reference significance for the design of FSS and electromagnetic pulse protection.