A Loaded Decoupling Surface Method for MIMO Antenna Arrays

Lun Cui; Yu Heng Wang; Shi Gang Zhou; Chow Yen Desmond Sim

doi:10.1109/LAWP.2025.3568173

A Loaded Decoupling Surface Method for MIMO Antenna Arrays

Lun Cui, Yu Heng Wang, Shi Gang Zhou, Chow Yen Desmond Sim

School of Electronics and Information

Research output: Contribution to journal › Article › peer-review

Abstract

A decoupling method using loaded decoupling surface (LDS) for multiple-input multiple-output (MIMO) antenna arrays is presented. To mitigate the direct electromagnetic coupling between array elements, an LDS is employed to generate a neutralizing wave that counteracts the original antenna coupling. A network model is developed to establish the relationship between antenna coupling and the LDS, enabling an accurate determination of the load impedance at the LDS for optimal isolation. To validate the proposed decoupling methodology, a 2×2 planar array with LDS centered at 4.85 GHz is proposed, and corresponding theoretical study is conducted as well. The simulated and measured results demonstrate that coupling levels are all effectively reduced to lower than -32.0 dB for both adjacent and non-adjacent units within the operation band, making the proposed LDS method suitable for MIMO applications.

Original language	English
Journal	IEEE Antennas and Wireless Propagation Letters
DOIs	https://doi.org/10.1109/LAWP.2025.3568173
State	Accepted/In press - 2025

Keywords

Decoupling
decoupling surface
MIMO
mutual coupling

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10.1109/LAWP.2025.3568173

Cite this

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title = "A Loaded Decoupling Surface Method for MIMO Antenna Arrays",

abstract = "A decoupling method using loaded decoupling surface (LDS) for multiple-input multiple-output (MIMO) antenna arrays is presented. To mitigate the direct electromagnetic coupling between array elements, an LDS is employed to generate a neutralizing wave that counteracts the original antenna coupling. A network model is developed to establish the relationship between antenna coupling and the LDS, enabling an accurate determination of the load impedance at the LDS for optimal isolation. To validate the proposed decoupling methodology, a 2×2 planar array with LDS centered at 4.85 GHz is proposed, and corresponding theoretical study is conducted as well. The simulated and measured results demonstrate that coupling levels are all effectively reduced to lower than -32.0 dB for both adjacent and non-adjacent units within the operation band, making the proposed LDS method suitable for MIMO applications.",

keywords = "Decoupling, decoupling surface, MIMO, mutual coupling",

author = "Lun Cui and Wang, {Yu Heng} and Zhou, {Shi Gang} and Sim, {Chow Yen Desmond}",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2025",

doi = "10.1109/LAWP.2025.3568173",

language = "英语",

journal = "IEEE Antennas and Wireless Propagation Letters",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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TY - JOUR

T1 - A Loaded Decoupling Surface Method for MIMO Antenna Arrays

AU - Cui, Lun

AU - Wang, Yu Heng

AU - Zhou, Shi Gang

AU - Sim, Chow Yen Desmond

PY - 2025

Y1 - 2025

N2 - A decoupling method using loaded decoupling surface (LDS) for multiple-input multiple-output (MIMO) antenna arrays is presented. To mitigate the direct electromagnetic coupling between array elements, an LDS is employed to generate a neutralizing wave that counteracts the original antenna coupling. A network model is developed to establish the relationship between antenna coupling and the LDS, enabling an accurate determination of the load impedance at the LDS for optimal isolation. To validate the proposed decoupling methodology, a 2×2 planar array with LDS centered at 4.85 GHz is proposed, and corresponding theoretical study is conducted as well. The simulated and measured results demonstrate that coupling levels are all effectively reduced to lower than -32.0 dB for both adjacent and non-adjacent units within the operation band, making the proposed LDS method suitable for MIMO applications.

AB - A decoupling method using loaded decoupling surface (LDS) for multiple-input multiple-output (MIMO) antenna arrays is presented. To mitigate the direct electromagnetic coupling between array elements, an LDS is employed to generate a neutralizing wave that counteracts the original antenna coupling. A network model is developed to establish the relationship between antenna coupling and the LDS, enabling an accurate determination of the load impedance at the LDS for optimal isolation. To validate the proposed decoupling methodology, a 2×2 planar array with LDS centered at 4.85 GHz is proposed, and corresponding theoretical study is conducted as well. The simulated and measured results demonstrate that coupling levels are all effectively reduced to lower than -32.0 dB for both adjacent and non-adjacent units within the operation band, making the proposed LDS method suitable for MIMO applications.

KW - Decoupling

KW - decoupling surface

KW - MIMO

KW - mutual coupling

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U2 - 10.1109/LAWP.2025.3568173

DO - 10.1109/LAWP.2025.3568173

M3 - 文章

AN - SCOPUS:105004803628

SN - 1536-1225

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

A Loaded Decoupling Surface Method for MIMO Antenna Arrays

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