【摘要】 频率选择表面结构在平面电磁波照射下,来自阵列的辐射电磁场以Floquet模形式存在,从电磁波传播的角度对Floquet传播模和衰减模进行了物理解释。详细分析了频率选择表面结构中,Floquet模传播时的频率变化特性,给出两个重要结论。通过一些具体阵列,研究了介质加载、栅格外形以及入射角对栅瓣出现和表面波频率的影响,得到一些有意义的规律,为频率选择表面结构电性能设计提供了依据。更多还原

【Abstract】 Electromagnetic radiation field emanating form array can be expressed with Floquet modes when frequency selective surface (FSS) configuration is exposed to an incident planar wave. Physical interpretation of Floquetpropagating and evanescent modes is made from view of propagation, frequency characteristics of Floquet modes in FSS configuration is analyzed in detail, and two significant conclusions are drawn. The effects of loaded dielectrics, lattice shape and angle of incidence on onset of grating lobes and surface wave frequency are researched through numerical examples, some meaning rules are gained, and foundation for electrical performance design of FSS configuration is provided.更多还原