Design and analysis of a compact four-port MIMO antenna with enhanced isolation for UWB application

Al Gburi, Ahmed Jamal Abdullah and Koteswara Rao Devana, Venkata Naga and Sarita, Vanka and Dhineshbabu, Nattanmai Raman and G. S.K., Gayatri Devi and Lavuri, Nageswara Rao and Praveenkumar, Seepana and Abduljaleel, Hala Kamal (2025) Design and analysis of a compact four-port MIMO antenna with enhanced isolation for UWB application. International Journal of Intelligent Engineering and Systems, 18 (4). pp. 210-218. ISSN 2185-310X

Text 0270205052025134646.pdf Download (932kB)

Abstract

A compact four-port self-isolated multiple-input multiple-output (MIMO) antenna with enhanced isolation for ultrawideband (UWB) and X-band applications is presented. The proposed antenna is printed on an FR-4 substrate with a size of 35 × 35 mm² and features embedded elliptical, circular, and rectangular structures as the radiating patch, along with a semi-elliptical defected ground structure (SE-DGS). The antenna operates over a frequency range of 3.91 GHz to beyond 15 GHz, achieving a peak gain of 5.41 dBi, a peak radiation efficiency of 92.84%, and an isolation of more than 30 dB across the operating band for UWB and X-band applications. The diversity characteristics include an envelope correlation coefficient (ECC) of less than 0.001, a diversity gain (DG) exceeding 9.99 dB, and a mean effective gain (MEG) lower than -3.01 dB, all achieved without the need for additional coupling elements among the antenna elements. The simulated results of the proposed antenna show a strong correlation with the measured results, making it a promising candidate for UWB-MIMO applications.

Item Type:	Article
Uncontrolled Keywords:	Defected ground structure (DGS), Diversity, Multiple-input-multiple-output (MIMO), Self-isolation, Ultrawideband (UWB).
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	23 Feb 2026 03:06
Last Modified:	23 Feb 2026 03:06
URI:	http://eprints.utem.edu.my/id/eprint/29514
Statistic Details:	View Download Statistic

Actions (login required)

View Item