The applicability of the method for solving the problem of diffraction by resistive gratings, based on solving the problem of exciting the Floquet channel by current elements to the calculation of structures with planar ideal gratings, is shown. A quasi-static approximation formula is obtained for the effective dielectric constant of a flat single-layer grating based on perfectly conducting squares. Comparative calculations of the reflection coefficient by diffraction and quasi-static methods for single-layer and two-layer gratings with dielectric layers are carried out.

中文翻译：

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基于理想导电平方的周期结构计算

在解决由电流元件激发浮球通道的问题的基础上，示出了用于解决由电阻光栅引起的衍射问题的方法在平面理想光栅结构计算中的适用性。基于理想导电平方，获得了平面单层光栅有效介电常数的准静态近似公式。通过衍射和准静态方法对带介电层的单层和两层光栅的反射系数进行了比较计算。