A compact two elements MIMO antenna for 5G communication

Ashfaq Ahmad; Dong-You Choi; Sadiq Ullah

doi:10.1038/s41598-022-07579-5

A compact two elements MIMO antenna for 5G communication

Sci Rep. 2022 Mar 4;12(1):3608. doi: 10.1038/s41598-022-07579-5.

Authors

Ashfaq Ahmad¹, Dong-You Choi², Sadiq Ullah³

Affiliations

¹ Communication and Wave Propagation Laboratory, Department of Information and Communication Engineering, Chosun University, Gwangju, 61452, South Korea.
² Communication and Wave Propagation Laboratory, Department of Information and Communication Engineering, Chosun University, Gwangju, 61452, South Korea. dychoi@chosun.ac.kr.
³ Department of Telecommunication Engineering, University of Engineering and Technology, Mardan, 23200, Pakistan.

Abstract

This study presents a simple, miniaturized, and low-profile multiple-input multiple-output (MIMO) antenna operating at 29 GHz with reduced mutual coupling between the antenna elements for futuristic 5G communication. The proposed design employs two radiating elements with slits in the radiators to produce high isolation among the antenna radiators. The MIMO antenna maintains a compact structure of 11.4 × 5.3 mm², which is the smallest size compared to previous 5G antennas. Roger's 4350B laminate was employed as a substrate material. At 29 GHz, low mutual coupling of - 36 dB, low envelope correlation coefficient (ECC < 0.001), and high diversity gain (DG > 9.8 dB) are achieved. The proposed design is examined in terms of the S-parameters, diversity gain, radiation pattern, and envelope correlation. Compared to the straight antenna element, an improvement of - 20 dB is observed in the isolation for both the simulated and measured results.