Four-Port 38 GHz MIMO Antenna with High Gain and Isolation for 5G Wireless Networks

Ibrahim, Ahmed A., Ali, Wael A. E., Alathbah, Moath Abdulrahman and Sabek, Ayman R. 2023. Four-Port 38 GHz MIMO Antenna with High Gain and Isolation for 5G Wireless Networks. MDPI sensors 23 (7) , 3557. 10.3390/s23073557

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Abstract

In this paper, a 38 GHz 4-port multiple-input multiple-output (MIMO) antenna with considerable isolation and gain enhancement for 5G applications is introduced. The suggested an- tenna element is a monopole antenna composed of a circular patch with a rectangular slot etched from it and a partial ground plane is used to extend the desired frequency to operate from 36.6 GHz to 39.5 GHz with a center frequency of 38 GHz. The high isolation is achieved by arranging the four elements orthogonally and adding four stubs to reduce mutual coupling between elements at the desired frequency bands. The gain improvement is also introduced by placing a frequency selective structure (FSS) which is designed at the same frequency bands of the antenna under the suggested MIMO antenna to act as a reflector. The proposed four-element MIMO with the FSS prototype is built and tested in order to confirm the simulated results. The suggested antenna operated from 37.2 GHz to 39.2 GHz with an isolation of less than 25 dB across the obtained frequency range. The peak gain of the antenna is enhanced from 5.5 dBi to around 10 dBi by utilizing the FSS structure; fur- thermore, the back radiation is enhanced. The MIMO performance is validated by extracting its pa- rameters and comparing with the simulated results. The results extracted from the simulation and the measurement show satisfactory matching along with the target band, indicating that the pro- posed structure could be used for 5G communications.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Engineering
Publisher:	MDPI
Date of First Compliant Deposit:	4 April 2023
Date of Acceptance:	27 March 2023
Last Modified:	10 Feb 2024 02:08
URI:	https://orca.cardiff.ac.uk/id/eprint/158151

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