Citation

Sheriff, Nathirulla and Vallappil, Arshad Karimbu and Rahim, Sharul Kamal A. and Khawaja, Bilal A. and Geok, Tan Kim and Iftikhar, Adnan and Uzair, Muhammad (2025) Compact low-profile multiple-input multiple-output (MIMO) antenna for portable devices in next-generation 5G wireless networks. Wireless Networks. ISSN 1022-0038

Text s11276-025-03991-7.pdf - Published Version Restricted to Repository staff only Download (6MB)

Abstract

This paper proposes a compact, low-profile, two-port MIMO antenna for portable devices operating in next-generation 5G wireless networks. The proposed design consists of two semi-circular radiating elements on FR4 substrate (εr = 4.4 and h = 1.6 mm). The overall antenna size is 0.40λ × 0.32λ (50 mm × 20 mm) at a center frequency of 4.85 GHz. A key innovation is the incorporation of complementary split-ring resonators (CSRR) in the ground plane, which significantly enhances isolation between the antenna elements. The CSRR technique effectively mitigates mutual coupling, achieving an isolation level below − 15dB, which is critical for MIMO systems to maintain signal integrity and reduce inter-port interference. The proposed antenna offers a broad 47% impedance bandwidth, covering 3.7–6 GHz. This wide bandwidth enables support for various communication standards, including the 5G N79 band, WLAN 4.9–5.0 GHz, and Wi-Fi 5 GHz. Experimental results closely match the simulated data, demonstrating good return-loss performance, high diversity gain over 9.9dB, and a low envelope correlation coefficient below 0.005, ensuring efficient MIMO operation by minimizing inter-port interference. The omnidirectional radiation patterns across the XZ- and YZ-planes further validate the antenna’s ability to provide stable and uniform coverage.

Item Type:	Article
Uncontrolled Keywords:	5G · MIMO · Portable device · WLAN · CSRR · Wi-Fi
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	26 Jun 2025 08:11
Last Modified:	26 Jun 2025 08:11
URII:	http://shdl.mmu.edu.my/id/eprint/14125

Downloads

Edit (login required)