Broadband self-isolating MIMO antenna array for 6G IoT systems

IF 3.1 3区物理与天体物理 Q2 Engineering Optik Pub Date : 2024-09-17 DOI:10.1016/j.ijleo.2024.172042

S. Samson Geoffrey, Saravanan Krishnan

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Abstract

A novel antenna array with improved radiation characteristics using a series-feed technique is presented in this article. The antenna array has a size of 132 × 80 μm and is developed using Polytetrafluoroethylene (PTFE) with graphene as conductive material. The proposed antenna comprises a central microstrip line loaded with short slant radiating stubs. The bandwidth characteristics of the antenna are enhanced by loading the slant stubs with octagonal ring elements. The number of radiating stubs is increased to enhance the overall radiation characteristics. The proposed THz antenna operates from 3.8 THz to 5.3 THz offering a fractional bandwidth of 31 % with reference |S₁₁| ≤ −10 dB. In addition, a 1 × 2 antenna array with differential feeding is explored to improve the overall directionality of the antenna making it a viable solution for directional IoT systems. The estimated theoretical directivity is above 11 dBi and the total efficiency is greater than 75 % throughout the operating bandwidth. Furthermore, the multiple input and multiple output (MIMO) performance of the THz antenna is discussed. The proposed two-element has an intrinsic isolation of more than 40 dB. Owing to the enhanced bandwidth and radiation property, the proposed THz antenna is suitable for high data-rate 6 G Internet-of-things (IoT) communications.

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用于 6G 物联网系统的宽带自隔离 MIMO 天线阵列

本文介绍了一种利用串联馈电技术改善辐射特性的新型天线阵。天线阵列的尺寸为 132 × 80 μm，采用聚四氟乙烯（PTFE）和石墨烯作为导电材料。拟议的天线包括一条中央微带线，上面装有短斜辐射短路。天线的带宽特性可通过在斜向辐射存根上加载八角环元件而得到增强。增加辐射存根的数量可增强整体辐射特性。该太赫兹天线的工作频率为 3.8 THz 至 5.3 THz，参考带宽为 31%，|S11| ≤ -10 dB。此外，还探索了一种具有差分馈电功能的 1 × 2 天线阵列，以改善天线的整体指向性，使其成为定向物联网系统的可行解决方案。估计的理论指向性超过 11 dBi，整个工作带宽内的总效率超过 75%。此外，还讨论了太赫兹天线的多输入多输出（MIMO）性能。所提出的双元件内在隔离度超过 40 dB。由于带宽和辐射特性的增强，所提出的太赫兹天线适用于高数据速率的 6 G 物联网（IoT）通信。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.