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.

Abstract

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.

Citation

Parchin, N. O., Al-Yasir, Y. I. A., Ali, A. H., Elfergani, I., Noras, J. M., Rodriguez, J., & Abd-Alhameed, R. A. (2019). Eight-Element Dual-Polarized MIMO Slot Antenna System for 5G Smartphone Applications. IEEE Access, 7, 15612-15622. https://doi.org/10.1109/access.2019.2893112

• 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
• DOI: https://doi.org/10.1109/access.2019.2893112
• Keywords: 5G, dual-polarized antenna, MIMO system, mobile terminal, ring slot antenna
• Public URL: http://researchrepository.napier.ac.uk/Output/2840261