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Four ports MIMO printed antenna with high isolation for UWB and X-band systems

Published online by Cambridge University Press:  21 April 2023

Ahmed A. Ibrahim Open the ORCID record for Ahmed A. Ibrahim [Opens in a new window] ,
Amira Eltokhy Open the ORCID record for Amira Eltokhy [Opens in a new window]  and
Ahmed Fawzy Daw Open the ORCID record for Ahmed Fawzy Daw [Opens in a new window]
Ahmed A. Ibrahim*
Affiliation:
Communications and Electronics Engineering Dep., Minia University, El-Minia, Egypt
Amira Eltokhy
Affiliation:
Rapid Bio-Labs, Tallinn, Estonia
Ahmed Fawzy Daw
Affiliation:
Faculty of Engineering, Modern Science and Arts (MSA) University, Cairo, Egypt
*
Author for correspondence: Ahmed A. Ibrahim, E-mail: ahmedabdel_monem@mu.edu.eg
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Abstract

In this work, a compact size 4 ports multiple input multiple output (MIMO) slot antenna with the connected ground for Ultra-Wide Band (UWB) and X band applications is introduced and discussed. The single antenna is a cross-shaped slot antenna in the ground plane and a 50 Ω microstrip line with a small L-stub is used to feed the antenna on the other side. The suggested MIMO antenna has four identical elements arranged to be orthogonal to each other to enhance the MIMO system performance. The antenna elements are connected with a small strip to compose the proposed connected ground antennas. The suggested MIMO antenna has an overall size of 47 mm × 47 mm. The antenna has tested and simulated bandwidth with S11 < −10 dB extended from 4– 14 GHz and has isolation greater than 20 dB between ports without utilizing the decoupling elements and with good consistency between results. The MIMO antenna has peak gain and efficiency, envelope correlation coefficient, diversity gain, and channel capacity loss of 5.6 dBi and 80%, <5 × 10–3, 10 dB, and <0.4 bit/s/Hz, respectively which prove that our antenna can be suggested for the UWB MIMO applications.

Keywords

Connected groundhigh isolationMIMO antennaslot antennaUWB technology
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 9 , November 2023 , pp. 1601 - 1609
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Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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