Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Malaysia.
Department of Information and Communication Technology (ICT), Faculty of Engineering, Comilla University, Cumilla, 3506, Bangladesh.
Sci Rep. 2022 Jun 8;12(1):9433. doi: 10.1038/s41598-022-13522-5.
This work proposes a compact metasurface (MS)-integrated wideband multiple-input multiple-output (MIMO) antenna for fifth generation (5G) sub-6 GHz wireless communication systems. The perceptible novelty of the proposed MIMO system is its wide operating bandwidth, high gain, lower interelement gap, and excellent isolation within the MIMO components. The radiating patch of the antenna is truncated diagonally with a partially ground plane, and a metasurface has been employed for enhancing the antenna performance. The suggested MS integrated single antenna prototype has a miniature dimension of 0.58λ × 0.58λ × 0.02λ. The simulated and measured findings demonstrate a wideband characteristic starting from 3.11 to 7.67 GHz including a high realized gain of 8 dBi. The four-element MIMO system has been designed by rendering each single antenna orthogonally to one another while retaining compact size and wideband properties between 3.2 and 7.6 GHz. The suggested MIMO prototype has been designed and fabricated on a low loss Rogers RT5880 substrate with a miniature dimension of 1.05λ × 1.05λ × 0.02λ and its performance is evaluated using a suggested 10 × 10 array of a square enclosed circular split ring resonators within the same substrate material. The inclusion of the proposed metasurface with a backplane significantly reduces antenna backward radiation and manipulates the electromagnetic field, thus improving the bandwidth, gain and isolation of MIMO components. The suggested 4-port MIMO antenna offers a high realized gain of 8.3 dBi compared to existing MIMO antennas with an excellent average total efficiency of 82% in the 5G sub-6 GHz spectrum and is in good accordance with measured results. Furthermore, the developed MIMO antenna exhibits outstanding diversity characteristics in respect of envelope correlation coefficient (ECC) less than 0.004, diversity gain (DG) close to 10 dB (> 9.98 dB) and high isolation between MIMO components (> 15.5 dB). Therefore, the proposed MS-inspired MIMO antenna substantiates its applicability for 5G sub-6 GHz communication networks.
本文提出了一种用于第五代 (5G) 低于 6GHz 无线通信系统的紧凑型基于超表面 (MS) 的宽带多输入多输出 (MIMO) 天线。所提出的 MIMO 系统的明显新颖之处在于其工作带宽宽、增益高、MIMO 元件之间的间隔小以及隔离度好。该天线的辐射贴片采用对角截断，并采用超表面来提高天线性能。所提出的 MS 集成单天线原型的尺寸较小，为 0.58λ×0.58λ×0.02λ。仿真和测量结果表明，该天线具有从 3.11GHz 到 7.67GHz 的宽带特性，包括 8dBi 的高实现增益。四元 MIMO 系统通过将每个单天线相互正交排列来设计，同时保持在 3.2GHz 至 7.6GHz 之间的紧凑尺寸和宽带特性。所提出的 MIMO 原型是在低损耗 Rogers RT5880 基板上设计和制造的，尺寸较小，为 1.05λ×1.05λ×0.02λ，并使用相同基板材料中的建议的 10×10 正方形封闭圆形分裂环谐振器阵列来评估其性能。在后板上加入所提出的超表面可以显著减少天线的后向辐射并操纵电磁场，从而提高 MIMO 元件的带宽、增益和隔离度。与现有的 MIMO 天线相比，所提出的 4 端口 MIMO 天线具有 8.3dBi 的高实现增益，在 5G 低于 6GHz 频谱中的平均总效率为 82%，与测量结果吻合较好。此外，所开发的 MIMO 天线在包络相关系数 (ECC) 小于 0.004、分集增益 (DG) 接近 10dB(>9.98dB)和 MIMO 元件之间的高隔离度方面表现出出色的分集特性(>15.5dB)。因此，所提出的基于 MS 的 MIMO 天线适用于 5G 低于 6GHz 通信网络。
