A compact dual-element UWB-MIMO antenna with single band-notched characteristics

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Frequenz Pub Date : 2024-03-06 DOI:10.1515/freq-2023-0356

Neha Dalakoti, Priyanka Jain

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Abstract

In this paper, a UWB MIMO (multi-input multi-output) antenna working from 3.3 GHz to 10 GHz with a single band notch at 4.5 GHz has been proposed. The antenna comprises of two circular microstrip patches of radius 6.4 mm with tapered microstrip feed line of input impedance 50 Ω connected to them. 1.6 mm thick FR4 substrate (εr = 4.4, tanδ = 0.02) of length and width 38 mm × 38 mm has been used. Partial ground consisting staircase, T-shaped slot, and defected H-shape slot have been utilized to enhance bandwidth and improve isolation. Additionally, C-shaped slot has been created on radiating element to produce a notch at 4.5 GHz. The design achieves a maximum gain of 5.8 dBi at 8.5 GHz and minimum gain of 0.5 dBi at 4.5 GHz. Isolation between the ports is more than 20 dB in the major portion of band of operation. It goes greater than 25 dB in the notch band. Envelope correlation coefficient (ECC) and diversity gain (DG) of 0.0006 and approx. 9.99 dB respectively has been obtained. Channel capacity loss of <−10 dB has been achieved. The proposed antenna is acceptable candidate for UWB MIMO applications.

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具有单带缺口特性的紧凑型双元件 UWB-MIMO 天线

本文提出了一种工作频率为 3.3 GHz 至 10 GHz 的 UWB MIMO（多输入多输出）天线，在 4.5 GHz 处有一个单频带缺口。该天线由两个半径为 6.4 毫米的圆形微带贴片和与之相连的输入阻抗为 50 Ω 的锥形微带馈线组成。天线使用 1.6 mm 厚的 FR4 基板（εr = 4.4，tanδ = 0.02），长宽为 38 mm × 38 mm。利用部分接地组成的阶梯、T 形槽和有缺陷的 H 形槽来增强带宽和提高隔离度。此外，还在辐射元件上制作了 C 形槽，以在 4.5 GHz 频率上产生一个缺口。该设计在 8.5 GHz 频率下实现了 5.8 dBi 的最大增益，在 4.5 GHz 频率下实现了 0.5 dBi 的最小增益。在主要工作频段，端口之间的隔离度超过 20 dB。在陷波频段，隔离度大于 25 dB。包络相关系数 (ECC) 和分集增益 (DG) 分别为 0.0006 和约 9.99 dB。信道容量损失为 10 dB。所提出的天线是 UWB MIMO 应用的可接受候选天线。

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

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.