Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure

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...

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Published in:Electronics (Basel) Vol. 9; no. 8; p. 1307
Main Authors: Arabi, Omer, See, Chan Hwang, Ullah, Atta, Ali, Nazar, Liu, Bo, Abd-Alhameed, Raed, McEwan, Neil J., Excell, Peter S.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.08.2020
Subjects:
Antenna design
Antennas
Applications programs
Bandwidths
Broadband
Computer simulation
Correlation coefficients
MIMO (control systems)
Mobile communication systems
Mobile computing
Multilayers
Mutual coupling
Optimization techniques
Orthogonal Frequency Division Multiplexing
Parameters
Ports
ISSN:2079-9292, 2079-9292
Online Access:Get full text
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Abstract 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.
AbstractList 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.
Author Ali, Nazar
McEwan, Neil J.
Liu, Bo
Arabi, Omer
See, Chan Hwang
Abd-Alhameed, Raed
Ullah, Atta
Excell, Peter S.
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Snippet 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...
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StartPage 1307
SubjectTerms Antenna design
Antennas
Applications programs
Bandwidths
Broadband
Computer simulation
Correlation coefficients
MIMO (control systems)
Mobile communication systems
Mobile computing
Multilayers
Mutual coupling
Optimization techniques
Orthogonal Frequency Division Multiplexing
Parameters
Ports
Title Compact Wideband MIMO Diversity Antenna for Mobile Applications Using Multi-Layered Structure
URI https://www.proquest.com/docview/2435329050
Volume 9
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