Compact self-Isolated MIMO antenna system with low mutual coupling for 5G mobile applications

Ghawbar, Fayad; Jumadi, A.S; Majid, H. A.; Saparudin, Faiz Asraf; Ghafar, Aimi Syamimi Ab; Esmail, Bashar A. F.

doi:10.1109/scored50371.2020.9250998

Cited by 1 publication

(2 citation statements)

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“…Acceptable isolation was attained by asymmetrically arranging the two mirrored loop antennas. To reduce coupling, self-isolated antennas have been investigated [15][16][17]. In [17], the compact design structure was composed of inverted U-shaped and two circular-ring structures embedded across two vertical stubs, and the antenna achieved good isolation between the four-antenna elements without using any additional decoupling techniques at 3.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…To reduce coupling, self-isolated antennas have been investigated [15][16][17]. In [17], the compact design structure was composed of inverted U-shaped and two circular-ring structures embedded across two vertical stubs, and the antenna achieved good isolation between the four-antenna elements without using any additional decoupling techniques at 3.5 GHz. In [18] and [19], a mode cancellation method is also proposed to design shared-radiator antenna pairs across a wide bandwidth operating at sub-6 GHz.…”

Section: Introductionmentioning

confidence: 99%

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Eight-port Diagonal Antenna with High Isolation and High Efficiency for 5G Smartphone

Shao

Wang

et al. 2023

ACES Journal

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In this letter, an 8x8 multiple-input-multiple-output (MIMO) antenna that operates in the sub-6 GHz (4.7-5.1 GHz) spectrum for 5G MIMO smartphone applications is presented. The design consists of a fully grounded plane with closely orthogonal antenna pairs placed symmetrically on the corners of the smartphone and each antenna element consists of an F-type monopole with dimensions of 18x7.5mm2. Firstly, the diversity characteristics of orthogonally placed antennas are used to reduce the coupling between antennas. On the other hand, diagonal antennas are connected by a neutral line (NL) to further improve isolation and etched slots on the ground to reduce the coupling between antenna pairs. A good frequency bandwidth (S11 < -10 dB) of 4.7-5.1 GHz has been obtained for the MIMO antenna, and the isolation is lower than 16 dB. In addition, total efficiency (TE) is greater than 77.5%, and the envelope correlation coefficient (ECC) is lower than 0.025. The fabricated antenna prototype is tested and offers good performance.

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