Citation

Hasan, Md. Mhedi and Islam, Mohammad Tariqul and Alam, Touhidul and Rahman, Md. Mushfiqur and Alawad, Mohamad A. and Alenezi, Abdulmajeed M. and Islam, Md. Shabiul and Soliman, Mohamed S. (2026) Isolation enhancement of a dual-band compact MIMO antenna using parasitic split ring structures for sub-6 GHz applications. Materials Today Communications, 54. p. 115613. ISSN 23524928

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Abstract

A low-profile dual-band compact two-port multiple-input multiple-output (MIMO) antenna loaded with double circular split ring parasitic elements (DCSRPE) is proposed for 5 G n77, n78, and n79 bands in this paper. The MIMO configuration is comprised of DCSRPE-loaded circular rings connected inverse T-shaped rectangular two adjacent resonators with a very small interelement spacing of 5 mm. The antenna with only a partial ground plane shows single-band radiation characteristics. When five DCSRPEs are added above the partial ground plane with effective synchronization, an additional operating band is observed in the n79 band of 5 G, confirming the desired applications. Moreover, the incorporation of parasitic structures enhances the isolation to better than 17.26 dB and 20.4 dB for lower and higher bands, respectively. In addition, the proposed technique also improves the impedance bandwidth of the antenna. The very compact size of the antenna is 21 × 45 mm² with a very low profile of about 0.016λmin at 3 GHz. The antenna is developed in a low-loss Rogers RT5880 substrate and measured. The percentage impedance bandwidth for both bands of the antenna is about 3–3.85 GHz (24.8%) and 4.59–5.1 GHz (10.5%). The envelope correlation coefficient (ECC), diversity gain (DG), mean effective gain (MEG), and channel capacity loss (CCL) of the developed antenna are explored and lie within the acceptable range, which reveals the efficient MIMO operation. Also, stable omnidirectional and dumbbell-shaped radiation patterns are seen in the H-plane and E-plane for both bands, respectively. Thus, the proposed low-profile antenna performance enhancement technique and its effective dual-band performance can find huge applications in the sub-6 GHz bands.

Item Type:	Article
Uncontrolled Keywords:	5 G band
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	04 Aug 2026 06:36
Last Modified:	04 Aug 2026 06:36
URII:	http://shdl.mmu.edu.my/id/eprint/16493

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