Dual-port bi-directional CP metasurface-integrated MIMO antenna for Wi-Fi 7 full-duplex communications

IF 5.4 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Science and Technology-An International Journal-Jestech Pub Date : 2025-06-05 DOI:10.1016/j.jestch.2025.102103

Phakpoom Sritongnuan , Phatsakul Thitimahatthanakusol , Nathapat Supreeyatitikul , Jessada Konpang

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引用次数: 0

Abstract

This research proposes a dual-port bi-directional circularly polarized (CP) metasurface (MTS)-integrated multiple-input-multiple-output (MIMO) antenna scheme for Wi-Fi 7 full-duplex communications. The antenna dimensions in electrical and mechanical size were 0.87 × 0.61 × 0.053 λ³ and 52.3 × 36.6 × 3.2 mm³, respectively. The dual-port CP MTS-integrated MIMO antenna scheme contained two clusters of MTS-integrated antenna, and each single-port antenna consisted of 3 × 4 MTS-gridded elements, circular-shaped patch, and ground plane. The single-port antennas were positioned facing each other to generate both right- and left-hand circular polarization. The CP MTS-gridded element was designed using characteristic mode analysis, where the two-mode orthogonality (Modes 1 and 4) contributed to CP radiation. The isolation between the dual-port MIMO antennas was enhanced through coupling current suppression. The operating bandwidth based on simulated and measured return loss (|S₁₁|, |S₂₂| ≤ −10 dB) were 60 % (4.96–8.86 GHz) and 56.46 % (5–8.67 GHz), respectively. The simulated and measured isolation (|S₂₁|) was less than −20 dB and –22 dB. The operating bandwidth based on simulated axial ratio 18 % (6.27–7.44 GHz) for both ports. Meanwhile, the measured axial ratio was 18.46 % (6.25 – 7.45 GHz) and 18.15 % (6.26–7.44 GHz) and for Ports 1 and 2. respectively. The highest gain of the simulated results was 5.47 dBic at 6.43 GHz for both ports, while the measured results were 6.5 dBic at 6.6 GHz for Port 1 and 6.55 dBic at 6.54 GHz for Port 2. The dual-port CP MTS-integrated MIMO antenna exhibits a bidirectional circularly polarized radiation pattern. Additionally, the envelope correlation coefficient remains below 0.005, while the diversity gain exceeds 9.985 dB, ensuring optimal MIMO performance. The mean effective gain, total active reflection coefficient, channel capacity loss were ≤−3 dB, < −15 dB, and <0.5 bits/s/Hz, respectively. These characteristics confirm the antenna’s suitability for Wi-Fi 7 full-duplex communication systems. Notably, this study is the first to introduce a dual-port bi-directional CP MTS-integrated MIMO antenna design specifically for Wi-Fi 7 full-duplex applications.

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用于Wi-Fi 7全双工通信的双端口双向CP超表面集成MIMO天线

本研究提出一种用于Wi-Fi 7全双工通信的双端口双向圆极化（CP）超表面（MTS）集成多输入多输出（MIMO）天线方案。天线的电气尺寸为0.87 × 0.61 × 0.053 λ3，机械尺寸为52.3 × 36.6 × 3.2 mm3。双端口CP mts集成MIMO天线方案包含两组mts集成天线，每个单端口天线由3 × 4 mts网格单元、圆形贴片和接地面组成。单端口天线彼此相对放置，以产生左右圆偏振。利用特征模态分析设计了CP mts网格单元，其中两模态正交性（模态1和模态4）对CP辐射有贡献。通过耦合电流抑制，增强了双端口MIMO天线间的隔离性。基于模拟回波损耗和实测回波损耗（|S11|、|S22|≤- 10 dB）的工作带宽分别为60% （4.96 ~ 8.86 GHz）和56.46% （5 ~ 8.67 GHz）。模拟和测量的隔离度（|S21|）分别小于- 20 dB和-22 dB。两个端口的工作带宽基于模拟轴比18% （6.27-7.44 GHz）。同时，端口1和端口2的实测轴比分别为18.46% （6.25 ~ 7.45 GHz）和18.15% （6.26 ~ 7.44 GHz）。分别。模拟结果的最高增益为6.43 GHz时的5.47 dBic，而端口1的测量结果为6.6 GHz时的6.5 dBic，端口2的6.54 GHz时的6.55 dBic。双端口CP mts集成MIMO天线呈现双向圆极化辐射方向图。此外，包络相关系数保持在0.005以下，而分集增益超过9.985 dB，确保了最佳的MIMO性能。平均有效增益、总有源反射系数、信道容量损耗均≤- 3db， <；−15db, <0.5 bits/s/Hz。这些特性证实了该天线适用于Wi-Fi 7全双工通信系统。值得注意的是，这项研究首次引入了专门用于Wi-Fi 7全双工应用的双端口双向CP mts集成MIMO天线设计。

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

Engineering Science and Technology-An International Journal-Jestech Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

11.20

自引率

3.50%

发文量

153

审稿时长

22 days

期刊介绍： Engineering Science and Technology, an International Journal (JESTECH) (formerly Technology), a peer-reviewed quarterly engineering journal, publishes both theoretical and experimental high quality papers of permanent interest, not previously published in journals, in the field of engineering and applied science which aims to promote the theory and practice of technology and engineering. In addition to peer-reviewed original research papers, the Editorial Board welcomes original research reports, state-of-the-art reviews and communications in the broadly defined field of engineering science and technology. The scope of JESTECH includes a wide spectrum of subjects including: -Electrical/Electronics and Computer Engineering (Biomedical Engineering and Instrumentation; Coding, Cryptography, and Information Protection; Communications, Networks, Mobile Computing and Distributed Systems; Compilers and Operating Systems; Computer Architecture, Parallel Processing, and Dependability; Computer Vision and Robotics; Control Theory; Electromagnetic Waves, Microwave Techniques and Antennas; Embedded Systems; Integrated Circuits, VLSI Design, Testing, and CAD; Microelectromechanical Systems; Microelectronics, and Electronic Devices and Circuits; Power, Energy and Energy Conversion Systems; Signal, Image, and Speech Processing) -Mechanical and Civil Engineering (Automotive Technologies; Biomechanics; Construction Materials; Design and Manufacturing; Dynamics and Control; Energy Generation, Utilization, Conversion, and Storage; Fluid Mechanics and Hydraulics; Heat and Mass Transfer; Micro-Nano Sciences; Renewable and Sustainable Energy Technologies; Robotics and Mechatronics; Solid Mechanics and Structure; Thermal Sciences) -Metallurgical and Materials Engineering (Advanced Materials Science; Biomaterials; Ceramic and Inorgnanic Materials; Electronic-Magnetic Materials; Energy and Environment; Materials Characterizastion; Metallurgy; Polymers and Nanocomposites)