An efficient approach to simulate the multiple scales, occurring in metascreens, is introduced. Due to the fine discretization around apertures, the standard finite element (FE) method leads to a large number of unknowns. Therefore, the generalized FE method is applied with multiscale functions, which are supported locally at the apertures. The idea is to develop a technique that is able to cope with varying thicknesses of the metascreen and arbitrary shapes of apertures as well as lossy materials and frequencies in a wide range. The proposed method improves the accuracy in simulations for metascreens in 2-D.

中文翻译：

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使用广义有限元方法的元屏幕增强技术

介绍了一种有效的方法来模拟出现在元屏幕中的多个比例。由于孔周围的精细离散，标准有限元（FE）方法导致大量未知数。因此，广义FE方法应用于多尺度函数，这些函数在孔径处局部支持。这个想法是要开发一种技术，该技术能够应对宽范围的不同尺寸的超滤屏和任意形状的孔以及有损耗的材料和频率。所提出的方法提高了二维元屏幕模拟的准确性。