Abstract

In this paper, we consider a two-dimensional problem of determining the equivalent surface impedance of an infinite array of slot impedance loads with a dielectric layer. Each element of the array contains three regions: the first region occupies the entire half-space above the interface and the primary field is excited in this region by a plane wave; the second region does not contain excitation sources and is a dielectric layer; and the third region also does not contain exciting sources and is bounded by the walls of the cavity with a equilateral triangle cross section. The second and third regions are connected through one or several slots in a perfectly conducting screen located at their border. A strip conductor is located in the opening of each slot. The problem was solved by the method of integral equations, for the numerical implementation of which the Krylov–Bogolyubov method was used. Numerical results are presented as the dependences of the equivalent surface impedance on the geometric dimensions of the structure at fixed values ​​of the array period, the incidence angle of the electromagnetic wave, and the thickness of the dielectric layer. A comparative analysis of the obtained dependences with the characteristics of a similar array without a dielectric layer is performed.

中文翻译：

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基于带有介电涂层的等边三角形截面腔的槽阻抗负载的无限周期阵列的等效表面阻抗

摘要

在本文中，我们考虑一个二维问题，即确定带电介质层的无限大缝隙阻抗负载阵列的等效表面阻抗。阵列的每个元素都包含三个区域：第一个区域占据界面上方的整个半空间，并且在该区域中通过平面波激发主场；第二区域不包含激发源，是介电层。第三区域也不包含激发源，并且由具有等边三角形横截面的腔壁界定。第二和第三区域通过位于其边界处的完美导电屏中的一个或多个插槽连接。条形导体位于每个插槽的开口中。该问题通过积分方程法解决了，对于使用Krylov–Bogolyubov方法的数值实现。数值结果表示为等效表面阻抗对阵列周期固定值下结构几何尺寸，电磁波的入射角和介电层厚度的依赖性。对获得的相关性与没有电介质层的类似阵列的特性进行比较分析。