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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


Hassan Sani Abubakar

Zhiqin Zhao

Boning Wang

Saad Hassan Kiani

Bandar Hakim


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.

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
Keywords antenna systems, 5G, MIMO, ECC


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