Copper frequency-selective surfaces with cross-shaped apertures fabricated by using laser ablation technology are investigated numerically and experimentally. Simulations and measurements are carried out for the $W$ -band range and the central frequency 90 GHz. It is shown that a single Fano resonance (FR) is excited when the symmetry of the aperture elements is violated. This resonance is highly sensitive to the polarization of the incident electromagnetic (EM) wave and geometrical parameters of periodic elements, in particular, the asymmetry of apertures. The EM effect found can be utilized to develop new functional devices of the mm-wave range.

中文翻译：

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具有十字形孔径的风扇共振频率选择表面

通过数值和实验研究了使用激光烧蚀技术制造的具有十字形孔的铜选频表面。对 $W$ 波段范围和中心频率 90 GHz 进行了模拟和测量。结果表明，当孔径元件的对称性被破坏时，会激发单个 Fano 共振 (FR)。这种共振对入射电磁 (EM) 波的极化和周期性元素的几何参数非常敏感，特别是孔径的不对称性。发现的电磁效应可用于开发毫米波范围的新功能器件。