Purpose

This paper aims to present the design of a compact vertically polarized four-element UWB antenna suitable for MIMO communications.

Design/methodology/approach

The unit cell antenna is constructed using a square ring radiator excited through a stepped impedance feed. The proposed antenna covers the Ultra-wideband (UWB) spectrum ranging from 2.2 to 12.3 GHz. The isolation between the unit cell antennas in the array is enhanced using a simple microstrip line resonator. The decoupling element is connected to the ground through a via.

Findings

The proposed scheme offers at least 16 dB improvement in the port-to-port coupling. Furthermore, the four-element antenna array is constructed using a specific interlocking scheme. The proposed antenna array’s Multiple Input Multiple Output (MIMO) performance metrics are analyzed.

Originality/value

By suitably selecting the excitation port, directional radiation patterns can be realized. The combined radiation pattern covers 360 degrees. A prototype antenna array is fabricated, and the simulation results are verified using real-time experiments. The proposed antenna is a suitable candidate for shark fin housing in automotive communications.

中文翻译：

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用于 MIMO 通信的紧凑型四端口垂直极化 UWB 单极天线

目的

本文旨在介绍适用于 MIMO 通信的紧凑型垂直极化四元件 UWB 天线的设计。

设计/方法/方法

单元天线是使用方形环形辐射器构建的，该辐射器通过阶梯阻抗馈电激发。提议的天线覆盖了 2.2 至 12.3 GHz 的超宽带 (UWB) 频谱。使用简单的微带线谐振器增强了阵列中单元天线之间的隔离。去耦元件通过通孔接地。

发现

提议的方案在端口到端口耦合方面提供了至少 16 dB 的改进。此外，四单元天线阵列是使用特定的互锁方案构建的。分析了建议的天线阵列的多输入多输出 (MIMO) 性能指标。

原创性/价值

通过适当地选择激励端口，可以实现定向辐射图案。组合辐射模式覆盖 360 度。制作了原型天线阵列，并使用实时实验验证了仿真结果。提议的天线是汽车通信中鲨鱼鳍外壳的合适候选者。