Isolation improvement in MIMO antenna with a simple hybrid technique of orthogonal and inverse currents

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Aeu-International Journal of Electronics and Communications Pub Date : 2024-11-09 DOI:10.1016/j.aeue.2024.155576

Manzoor Elahi , Slawomir Koziel , Leifur Leifsson

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Abstract

This paper presents a compact high-isolation multiple-input multiple-output (MIMO) antenna developed using a hybrid approach. The proposed technique combines induced orthogonal currents and self-inverse currents to enhance the antenna’s performance. Orthogonal currents are generated by strategically etching open slots on the antenna patches, while self-inverse currents are introduced by integration of annular vias. By carefully adjusting the radius and position of the annular vias and optimizing the patch geometry, the design achieves optimal resonance frequency alignment and significantly improved isolation. The fabricated prototype exhibits an exceptional isolation of 55 dB at 5.75 GHz, accompanied by a realized gain of 6.7 dB. Measured radiation patterns in the

ϕ = 0^{\circ}

and

ϕ = 9 0^{\circ}

planes show excellent agreement with simulated results. The proposed low-profile antenna design has a substantial potential for enhancing MIMO applications in contemporary wireless communication systems.

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利用正交和反向电流的简单混合技术改善多输入多输出天线的隔离性能

本文介绍了一种采用混合方法开发的紧凑型高隔离多输入多输出（MIMO）天线。所提出的技术结合了诱导正交电流和自反向电流，以增强天线的性能。正交电流是通过在天线贴片上战略性地蚀刻开槽产生的，而自反向电流则是通过整合环形通孔引入的。通过仔细调整环形通孔的半径和位置以及优化贴片的几何形状，该设计实现了最佳谐振频率排列，并显著提高了隔离度。制作的原型在 5.75 GHz 时的隔离度高达 55 dB，同时实现了 6.7 dB 的增益。在 ϕ=0∘ 和 ϕ=90∘ 平面上测量到的辐射模式与模拟结果非常吻合。所提出的低剖面天线设计在增强当代无线通信系统中的多输入多输出应用方面具有巨大潜力。

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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.