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Eight-Element Dual-Polarized MIMO Slot Antenna System for 5G Smartphone Applications

Parchin, Naser Ojaroudi; Al-Yasir, Yasir Ismael Abdulraheem; Ali, Ammar H.; Elfergani, Issa; Noras, James M.; Rodriguez, Jonathan; Abd-Alhameed, Raed A.


Yasir Ismael Abdulraheem Al-Yasir

Ammar H. Ali

Issa Elfergani

James M. Noras

Jonathan Rodriguez

Raed A. Abd-Alhameed


In this paper, we propose an eight-port/four-resonator slot antenna array with a dual-polarized function for multiple-input-multiple-output (MIMO) 5G mobile terminals. The design is composed of four dual-polarized square-ring slot radiators fed by pairs of microstrip-line structures. The radiation elements are designed to operate at 3.6 GHz and are located on the corners of the smartphone PCB. The square-ring slot radiators provide good dual-polarization characteristic with similar performances in terms of fundamental radiation characteristics. In order to improve the isolation and also reduce the mutual coupling characteristic between the adjunct microstrip-line feeding ports of the dual-polarized radiators, a pair of circular-ring/open-ended parasitic structures is embedded across each square-ring slot radiator. The -10-dB impedance bandwidth of each antenna-element is 3.4-3.8 GHz. However, for -6-dB impedance bandwidth, this value is 600 MHz (3.3-3.9 GHz). The proposed MIMO antenna offers good S-parameters, high-gain radiation patterns, and sufficient total efficiencies, even though it is arranged on a high-loss FR-4 dielectric. The SAR function and the radiation characteristics of the proposed design in the vicinity of user-hand/user-head are studied. A prototype of the proposed smartphone antenna is fabricated, and good measurements are provided. The antenna provides good features with a potential application for use in the 5G mobile terminals.

Journal Article Type Article
Acceptance Date Jan 2, 2019
Online Publication Date Jan 31, 2019
Publication Date 2019
Deposit Date Feb 21, 2022
Journal IEEE Access
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 7
Pages 15612-15622
Keywords 5G, dual-polarized antenna, MIMO system, mobile terminal, ring slot antenna
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