In this article, dielectric loading is introduced as a method for miniaturizing dual‐polarized crossed dipole antenna. Specifically, the size, thickness, and relative permittivity of dielectric slab are considered as three critical parameters for antenna miniaturization. It is found that the three parameters have different loading effects on a crossed dipole, due to distinct modal current and field distributions. Furthermore, an antenna configuration loaded by 3‐layer dielectric slabs is proposed. Utilizing the slow‐wave property of dielectric loading, two miniaturized crossed dipole antennas with size of 40 mm × 40 mm (0.29 λ₀ × 0.29 λ₀) are devised, exhibiting an at least 21% size reduction over the previous dual‐linearly‐polarized crossed dipole antennas. Simulated and measured results demonstrate that the proposed antennas have wide bandwidth (1.71‐2.69 GHz), desirable impedance matching (VSWR <1.5), stable radiation pattern, and low gain loss.

中文翻译：

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利用介电负载使双极化交叉偶极天线小型化

在本文中，介电负载被介绍为一种使双极化交叉偶极天线小型化的方法。具体来说，电介质板的尺寸，厚度和相对介电常数被认为是天线小型化的三个关键参数。发现由于不同的模态电流和场分布，这三个参数对交叉偶极子具有不同的负载效应。此外，提出了一种由三层电介质平板加载的天线配置。利用电介质加载的慢波属性中，两个小型化的交叉偶极子天线，40毫米×40毫米（0.29λ尺寸₀  ×0.29λ ₀）的设计，与以前的双线性极化交叉偶极子天线相比，尺寸至少减小了21％。仿真和测量结果表明，所建议的天线具有较宽的带宽（1.71-2.69 GHz），理想的阻抗匹配（VSWR <1.5），稳定的辐射方向图和低增益损耗。