In this article, a three‐port circularly polarized (CP) multiple‐input multiple‐output (MIMO) antenna for wireless local area network (WLAN) application with pattern and polarization diversity is proposed. The proposed MIMO antenna system comprises of a broadside CP antenna element with a T‐shaped slot and two endfire CP antenna elements. Good impedance bandwidth of 16.9% and 5.5% are achieved by the broadside CP antenna and endfire CP antenna, respectively, and their corresponding axial ratio (AR) bandwidth is 7% and 10.47%. The isolation between the different antenna elements is better than 20 dB, and the polarization purity for all CP antenna is more than 25 dB along with the maximum radiation.

中文翻译：

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具有模式和极化分集的WLAN应用的三端口圆极化MIMO天线

本文针对具有模式和极化分集的无线局域网（WLAN）应用，提出了一种三端口圆极化（CP）多输入多输出（MIMO）天线。拟议的MIMO天线系统包括具有T形缝隙的宽边CP天线元件和两个端射CP天线元件。宽边CP天线和端射CP天线分别实现了16.9％和5.5％的良好阻抗带宽，其相应的轴向比率（AR）带宽分别为7％和10.47％。不同天线元件之间的隔离度优于20 dB，所有CP天线的极化纯度以及最大辐射均大于25 dB。