In this article, we propose a model to obtain negative electrical permittivity in metamaterials using a conductor wire of rectangular cross-sectional geometry. Plasma frequency in the GHz range is determined in terms of the wire geometry. This new composite dielectric, which has the property of negative electrical permittivity below the plasma frequency, opens new possibilities for GHz devices. Finally, we show a unitary metamaterial cell where the refractive index takes negative values over a wide frequency range.

中文翻译：

---

矩形截面导线超材料中的负介电常数：在天线设计中的应用

在本文中，我们提出了一个模型，用于使用矩形横截面几何形状的导线获得超材料中的负介电常数。GHz 范围内的等离子体频率是根据导线几何形状确定的。这种新的复合电介质在等离子体频率以下具有负介电常数的特性，为 GHz 设备开辟了新的可能性。最后，我们展示了一个单一的超材料单元，其中折射率在很宽的频率范围内取负值。