This paper presents a high-performance multiple-input multiple-output (MIMO) antenna with a compact size of 42 × 42 mm². The proposed antenna operates in the frequency range of 3.2–12 GHz for ultra wide band (UWB) wireless communication systems. The proposed MIMO antenna has four identical elements arranged to be orthogonal to each other to achieve a good performance. To achieve high isolation, stubs between the four radiating elements were used. Measured and simulated results were analyzed to obtain the antenna performance in the form of studying radiation pattern, Envelope Correlation Coefficient (ECC), diversity gain, and channel capacity loss. Additionally, simulated peak gain and total efficiency are acquired. Results indicate that the proposed antenna has UWB bandwidth, high isolation higher than 17 dB, and low correlation coefficient; therefore, this antenna is suitable for UWB wireless applications.

本文提出了一种紧凑型尺寸为42×42 mm ²的高性能多输入多输出（MIMO）天线。对于超宽带（UWB）无线通信系统，建议的天线工作在3.2–12 GHz的频率范围内。所提出的MIMO天线具有被布置为彼此正交的四个相同的元件以实现良好的性能。为了实现高度隔离，在四个辐射元件之间使用了短截线。分析测量结果和模拟结果，以研究辐射方向图，包络相关系数（ECC），分集增益和信道容量损耗的形式获得天线性能。此外，还可以获得模拟的峰值增益和总效率。结果表明，该天线具有UWB带宽，隔离度高于17 dB，相关系数低。因此，该天线适用于UWB无线应用。