Design of an eight-port MIMO antenna for direct integration into the back cover of 5G mobile terminals

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-16 DOI:10.1016/j.aeue.2025.155950

Sandeep Rana , Vimal Kumar , Akhilesh Mohan

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引用次数: 0

Abstract

This paper introduces a planar wideband eight-port multiple input multiple output (MIMO) antenna characterized by an elevated inter-port isolation. The unit element is meticulously engineered utilizing a rectangular microstrip patch antenna (MPA) with two sides shorted by metallic vias. Consequently, two distinct modes of MPA, namely TM₀₁ and TM₁₁, are stimulated in close proximity to each other. This specially designed unit element offers wideband performance and eventually improves inter-port isolation when duplicated to create an eight-port MIMO antenna. Additionally, four bow tie-shaped stubs are positioned at the central plane to improve inter-port isolation. A prototype is implemented to verify the proposed concept, and the measured results indicate that the eight-port MIMO antenna demonstrates an impedance bandwidth (|S₁₁| ≤ −6dB) of ∼12 % (5.92–6.65 GHz) with a minimum inter-port isolation of 22 dB. The proposed MIMO antenna is a suitable candidate for installation on the metallic back cover as it does not require any ground clearance or internal space of the mobile phone.

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设计八端口MIMO天线，可直接集成到5G移动终端的后盖

本文介绍了一种平面宽带八端口多输入多输出（MIMO）天线，其特点是提高了端口间隔离。单元元件采用矩形微带贴片天线（MPA）精心设计，两侧由金属过孔短路。因此，两种不同的MPA模式，即TM01和TM11，彼此接近地受到刺激。这种专门设计的单元元件提供宽带性能，并最终提高端口间隔离，当重复创建一个八端口MIMO天线。此外，在中心平面上放置了四个弓形短桩，以提高端口间的隔离。为了验证提出的概念，实现了一个原型，测量结果表明，八端口MIMO天线的阻抗带宽（|S11|≤- 6dB）为~ 12% (5.92-6.65 GHz)，端口间隔离最小为22 dB。建议的MIMO天线是安装在金属后盖上的合适人选，因为它不需要任何离地间隙或手机内部空间。

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

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.