Frequency Selective Surface Structure Miniaturization Using Interconnected Array Elements on Orthogonal Layers
Frequency Selective Surface Structure Miniaturization Using Interconnected Array Elements on Orthogonal Layers
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DOI：
10.1109/tap.2017.2684199
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发表时间：
2017-03
影响因子：
5.7
通讯作者：
M. Hussein;Jiafeng Zhou;Yi Huang;M. Kod;A. P. Sohrab
中科院分区：
文献类型：
--
作者：
M. Hussein;Jiafeng Zhou;Yi Huang;M. Kod;A. P. Sohrab
传统上，频率选择表面（FSS）的元件是旋转对称的，并且多层FSS中的元件阵列彼此对齐。本文提出了一种小型化 FSS 阵列单元尺寸的新方法，即在两层 FSS 结构中仅在一个方向上互连阵列单元。一层充当增强型电感器，而另一层则提供电容。相邻阵列单元之间的互连改变了等效电路并产生强大的跨层电容，从而显着降低了谐振频率。小型化 FSS 元件的尺寸远小于谐振频率下的波长（周期性 $\ll \lambda ）$ 。该元件还可以具有低轮廓，因为跨层电容在更薄的基板上更强。该结构对入射角的敏感性与传统结构相当。基于对FSS结构的几何配置及其电场分布的分析，建立了理论等效电路模型来表征该结构。实验结果验证了该理论。
Traditionally, the element of a frequency selective surface (FSS) is rotationally symmetrical and the element arrays in a multilayer FSS are aligned with each other. A new approach to miniaturize the size of the FSS array element is proposed in this paper by interconnecting the array elements only in one direction in a two-layer FSS structure. One layer acts as an enhanced inductor while the other layer provides capacitance. The interconnection between the adjacent array elements changes the equivalent circuit and produces a strong cross-layer capacitance, which lowers the resonant frequency significantly. The dimensions of the miniaturized FSS element are much smaller than the wavelength at the resonant frequency (periodicity $\ll \lambda )$ . The element can also have a low profile since the cross-layer capacitance is stronger with a thinner substrate. The sensitivity to the incident angle of the proposed structure is comparable with traditional ones. A theoretical equivalent circuit model is developed to characterize the structure, based on the analysis of the geometrical configuration of the FSS structure and the electric field distribution on it. The theory was verified by the experimental results.