Compact wideband MIMO diversity antenna for mobile applications using multi-layered structure

Arabi, O., See, C. H., Ullah, A., Ali, N., Liu, B. , Abd-Alhameed, R., McEwan, N. J. and Excell, P. S. (2020) Compact wideband MIMO diversity antenna for mobile applications using multi-layered structure. Electronics, 9(8), 1307. (doi: 10.3390/electronics9081307)

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A closely packed wideband multiple-input multiple-output (MIMO)/diversity antenna (of two ports) with a small size of less than 18.5 mm by 18.5 mm is proposed for mobile communication applications. The antenna can be orthogonally configured for corner installation or by placing it on a back-to-back structure for compact modules. To enhance the isolation and widen the bandwidth, the antenna is structured with multiple layers having differing dielectric constants. The feeding through a via significantly reduces the ground waves. A multi-fidelity surrogate model-assisted design exploration method is employed to obtain the optimized antenna geometric parameters efficiently. The antenna design was investigated using electromagnetic simulation and a physical realization of the optimal design was then created and subjected to a range of tests. The specific parameters investigated included reflection coefficients, mutual coupling between the input ports, radiation patterns, efficiency and parameters specific to MIMO behavior: envelope correlation coefficient and pattern diversity multiplexing coefficient. It was found that the antenna has an impedance bandwidth of approximately 4 GHz, mutual coupling between input ports of better than −18 dB and an envelope correlation coefficient of less than 0.002 across the operating band. This makes it a good candidate design for many mobile MIMO applications.

Item Type:Articles
Additional Information:Invited paper. This work is partially supported by the innovation program under grant H2020-MSCAITN-2016 SECRET-722424 and financial support from the UK Engineering and Physical Sciences Research Council (EPSRC) under grant EP/E022936/1.
Glasgow Author(s) Enlighten ID:Liu, Dr Bo
Creator Roles:
Liu, B.Conceptualization, Methodology, Software, Investigation, Resources, Data curation, Supervision, Project administration, Funding acquisition
Authors: Arabi, O., See, C. H., Ullah, A., Ali, N., Liu, B., Abd-Alhameed, R., McEwan, N. J., and Excell, P. S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Electronics
ISSN (Online):2079-9292
Published Online:14 August 2020
Copyright Holders:Copyright © 2020 The Authors
First Published:First published in Electronics 9(8): 1307
Publisher Policy:Reproduced under a Creative Commons License

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