Low-profile MIMO antenna for sub-6G smartphone applications with minimal footprint: an SVM-guided approach

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Computational Electronics Pub Date : 2024-10-11 DOI:10.1007/s10825-024-02236-8

Devisowjanya Potti, Sakthi Abirami Balakrishnan, Vijaiya Kesavan Kesavan Murugesan, Soundar Rajan Gomathinayagam

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Abstract

This paper investigates the performance of a low-profile 8 × 8 multi-input-multi-output (MIMO) antenna with zero ground clearance, designed using an intelligent antenna recommender system. A dissimilar antenna pair is employed to achieve multi-band resonance and enhance isolation for sub-6G mobile communication. The primary antenna is a loop antenna resonating at n77, n79, and n46 bands, designed with the aid of a model developed using a support vector machine (SVM). The auxiliary antenna is a modified monopole resonating at n78 and n79 bands to minimize the antenna footprint on mobile devices. An eight-antenna MIMO array is fabricated, and measured results demonstrate that the proposed antenna has a reflection coefficient of less than − 10 dB at 3.5, 3.7, 4.5, and 5.2 GHz, with diversity gain and isolation greater than 9 dBi and 15 dB, respectively. SAR analysis conducted on a human head model shows a maximum SAR value of less than 1.6 W/kg at all sub-6G bands, compliant with FCC standards. The proposed MIMO antenna offers a viable solution, even when integrated with a battery and display, without occupying internal space within a mobile phone.

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用于 6G 以下智能手机应用、占用空间最小的低剖面 MIMO 天线：SVM 引导方法

本文研究了利用智能天线推荐系统设计的具有零离地间隙的扁平 8 × 8 多输入多输出 (MIMO) 天线的性能。该系统采用了一对不同的天线，以实现多频带谐振并增强隔离度，从而实现 6G 以下移动通信。主天线是在 n77、n79 和 n46 波段共振的环形天线，借助使用支持向量机（SVM）开发的模型进行设计。辅助天线是在 n78 和 n79 波段产生共鸣的改进型单极天线，以尽量减少移动设备上的天线占地面积。测量结果表明，在 3.5、3.7、4.5 和 5.2 GHz 频段，拟议天线的反射系数小于 - 10 dB，分集增益和隔离度分别大于 9 dBi 和 15 dB。对人体头部模型进行的 SAR 分析表明，在所有 6G 以下频段，最大 SAR 值均小于 1.6 W/kg，符合 FCC 标准。提出的多输入多输出天线提供了一种可行的解决方案，即使与电池和显示屏集成在一起，也不会占用手机内部空间。

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来源期刊

Journal of Computational Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED

CiteScore

4.50

自引率

4.80%

发文量

142

审稿时长

>12 weeks

期刊介绍： he Journal of Computational Electronics brings together research on all aspects of modeling and simulation of modern electronics. This includes optical, electronic, mechanical, and quantum mechanical aspects, as well as research on the underlying mathematical algorithms and computational details. The related areas of energy conversion/storage and of molecular and biological systems, in which the thrust is on the charge transport, electronic, mechanical, and optical properties, are also covered. In particular, we encourage manuscripts dealing with device simulation; with optical and optoelectronic systems and photonics; with energy storage (e.g. batteries, fuel cells) and harvesting (e.g. photovoltaic), with simulation of circuits, VLSI layout, logic and architecture (based on, for example, CMOS devices, quantum-cellular automata, QBITs, or single-electron transistors); with electromagnetic simulations (such as microwave electronics and components); or with molecular and biological systems. However, in all these cases, the submitted manuscripts should explicitly address the electronic properties of the relevant systems, materials, or devices and/or present novel contributions to the physical models, computational strategies, or numerical algorithms.