Minimally Coupled Two-Element MIMO Antenna with Dual Band (28/38 GHz) for 5G Wireless Communications

• Published in: Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2022-03, Vol.43 (3-4), p.335-348
• Main Authors: Sabek, Ayman R., Ali, Wael A. E., Ibrahim, Ahmed A.
• Format: Article
• Language: English
• Subjects: 5G mobile communication; Antenna radiation patterns; Antennas; Banded structure; Classical Electrodynamics; Configurations; Electrical Engineering; Electronics and Microelectronics; Engineering; Frequencies; Ground plane; Instrumentation; MIMO communication; Wireless communications
• ISSN: 1866-6892; 1866-6906
• DOI: 10.1007/s10762-022-00857-3

This paper presents a dual-band 28/38 GHz two elements multiple-input multiple-output (MIMO) antenna with high isolation for 5G applications. The suggested antenna is a monopole with rectangular and triangle stubs added to the patch and a partial ground plane to achieve the dual band’s behavior. Two elements of the suggested antenna are combined and placed orthogonally to achieve the high isolation features of the MIMO configuration at 28/38 GHz. The MIMO configuration has a size of 27.65 × 12 × 0.273 mm 3 . The suggested MIMO prototype is fabricated and tested. The tested results achieved dual frequency bands with S 11 lower than − 10 dB within two frequency bands (26–30 GHz and 36–41.5 GHz) and S 21 lower than − 20 dB through the two operated bands. The suggested antenna has semi-omnidirectional radiation patterns in both planes. As well, its measured peak gain is 5.2 dBi and 5.3 dBi at the two operated frequency bands, respectively. Also, the MIMO parameters are extracted to validate the simulated results. The simulated and tested results have a good matching within the two operating bands which suggests the proposed structure be utilized in 5G communications.