Eight-Port Modified E-Slot MIMO Antenna Array with Enhanced Isolation for 5G Mobile Phone

Abubakar, Hassan Sani; Zhao, Zhiqin; Wang, Boning; Kiani, Saad Hassan; Parchin, Naser Ojaroudi; Hakim, Bandar

Abstract

An eight-element antenna system operating at sub 6 GHz is presented in this work for a future multiple-input multiple-output (MIMO) system based on a modified E-slot on the ground. The modified E-slot significantly lowers the coupling among the antenna components by suppressing the ground current effect. The design concept is validated by accurately measuring and carefully fabricating an eight-element MIMO antenna. The experimentation yields higher element isolation greater than −21 dB in the 3.5 GHz band and the desired band is achieved at −6 dB impedance bandwidth. The E-shape slot occupies an area of 17.8 mm × 5.6 mm designed on an FR-4 substrate with dimensions of 150 mm × 75 mm × 0.8 mm. We fed the I-antenna element with an L-shape micro-strip feedline, the size of the I-antenna is 20.4 × 5.2 mm2, which operates in the (3.4–3.65 GHz) band. Moreover, our method obtained an envelope correlation coefficient (ECC) of <0.01 and an ergodic channel capacity of 43.50 bps/Hz. The ECC and ergodic channel capacity are important metrics for evaluating MIMO system performance. Results indicate that the proposed antenna system is a good option to be used in 5G mobile phone applications.

Citation

Abubakar, H. S., Zhao, Z., Wang, B., Kiani, S. H., Parchin, N. O., & Hakim, B. (2023). Eight-Port Modified E-Slot MIMO Antenna Array with Enhanced Isolation for 5G Mobile Phone. Electronics, 12(2), Article 316. https://doi.org/10.3390/electronics12020316

• Journal Article Type: Article
• Acceptance Date: Jan 4, 2023
• Online Publication Date: Jan 7, 2023
• Publication Date: 2023
• Deposit Date: Jan 16, 2023
• Publicly Available Date: Jan 16, 2023
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 12
• Issue: 2
• Article Number: 316
• DOI: https://doi.org/10.3390/electronics12020316
• Keywords: antenna systems, 5G, MIMO, ECC