In this letter, a compact ±45° polarized base station antenna array fabricated using laser direct structuring (LDS) technique is presented. The proposed antenna array operates in fifth-generation (5G) NR band 41 (2496–2690 MHz). The simple antenna elements of the array consist of a modified patch radiator fed by Y-shaped probes realized by injection molding, which are amenable to efficient mass production. An antenna unit (AU) is investigated to meet the specification requirements in practical base-station applications. A prototype of the AU was manufactured and measured, and the results showed that it is able to fulfill the design requirements within the operating band. These features also show that this LDS-based antenna array would be a promising solution for 5G base station applications.

中文翻译：

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采用激光直接成型技术的紧凑型双极化基站天线阵列

在这封信中，介绍了使用激光直接成型 (LDS) 技术制造的紧凑型 ±45° 极化基站天线阵列。提议的天线阵列在第五代 (5G) NR 频段 41 (2496–2690 MHz) 中运行。该阵列的简单天线元件由一个改进的贴片辐射器组成，该辐射器由通过注塑成型实现的 Y 形探针馈送，适合高效的批量生产。研究天线单元 (AU) 以满足实际基站应用中的规范要求。制造并测量了 AU 的原型，结果表明它能够在工作频段内满足设计要求。这些特性还表明，这种基于 LDS 的天线阵列将成为 5G 基站应用的有前途的解决方案。