This article presents a high-performance fully metallic dual-polarized wideband Vivaldi array for the $Ka$ -band (26–40 GHz), which is going to be used, for example, in 5G millimeter-wave (mmWave) communication networks. Antenna-array elements are fed straight from a single printed circuit board (PCB) that allows integrating active components in the immediate proximity of antenna elements. A whole array can be placed on a PCB as a through-hole or surface-mount technology component. The antenna is simulated in a unit cell with periodic boundary conditions and in an $8\times8$ array configuration. The simulations show that the active reflection coefficient is below −10 dB across the entire $Ka$ -band and throughout most of the beam-steering angles up to ±60°. Lower than 3 dB scan loss is achieved in approximately ±60° range in the elementary planes and ±50° in the diagonal planes. The reflection coefficient and gain of each of the four elements in different parts of the manufactured dual-polarized $8\,\,\times8$ array were measured and simulated with the remaining elements terminated with a $50~\Omega $ load. The measured results follow closely the full-wave finite array simulation results; the reflection coefficient is low and the element pattern is wide over the entire frequency range.

中文翻译：

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双极化 Ka 波段 Vivaldi 天线阵列

本文介绍了一种高性能全金属双极化宽带 Vivaldi 阵列，用于 $K$ -band (26–40 GHz)，将用于例如 5G 毫米波 (mmWave) 通信网络。天线阵列元件直接从单个印刷电路板 (PCB) 馈电，该印刷电路板允许在天线元件附近集成有源元件。整个阵列可以作为通孔或表面贴装技术组件放置在 PCB 上。天线在具有周期性边界条件的单位单元中进行仿真，并在 $8\times8$ 阵列配置。仿真结果表明，整个区域的有源反射系数低于 -10 dB。 $K$ - 波段和整个大部分波束转向角高达 ±60°。在基本平面的大约 ±60° 范围内和对角平面内的 ±50° 范围内实现低于 3 dB 的扫描损耗。制造的双偏振片不同部位的四个元件的反射系数和增益 $8\,\,\times8$ 阵列被测量和模拟，其余元素终止于 $50~\Omega $ 加载。实测结果与全波有限阵列仿真结果密切相关；反射系数低，元件图案在整个频率范围内都很宽。