A Full Design Perspective of Port Decoupling for MIMO Antennas: Preservation of Radiation Pattern

Guang-Yao Liu; Nan Yang; Kwok Wa Leung; Kwai Man Luk

doi:10.1109/TAP.2024.3484680

A Full Design Perspective of Port Decoupling for MIMO Antennas: Preservation of Radiation Pattern

Guang-Yao Liu, Nan Yang^*, Kwok Wa Leung, Kwai Man Luk

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

5 Citations (Scopus)

Abstract

Whereas most studies of decoupling methods in antenna designs are limited to port isolation, this paper additionally investigates the radiation-pattern-decoupling (RPD) method to preserve the radiation pattern in a port-decoupling design. The RPD method introduce shorting vias to obtain a new current component for canceling the coupled current, leaving the original active current on the coupled antenna element. As a result, each element effectively has its own active current only, minimizing the coupling effects on the antenna port and radiation pattern. For demonstration, this RPD method is applied to a MIMO design using broadside microstrip antennas. Both 1×2 and 4×4 MIMO arrays are considered, with reasonable agreement between the measured and simulated results. Both of the arrays have an overlapping impedance and isolation bandwidth of more than 5%, with the portion isolation higher than 16.5 dB. © 2024 IEEE.

Original language	English
Pages (from-to)	9164-9176
Journal	IEEE Transactions on Antennas and Propagation
Volume	72
Issue number	12
Online published	28 Oct 2024
DOIs	https://doi.org/10.1109/TAP.2024.3484680
Publication status	Published - Dec 2024

Funding

This work was supported in part by the General Research Fund (GRF) Grant from the Research Grants Council of Hong Kong Special Administrative Region, China (Project no. CityU 11218020), in part by the Shenzhen-Hong Kong-Macau Science and Technology Project (Category C) (Project no. SGDX20210823104002018), and in part by 2022 Guangdong-Hong Kong-Macao Joint Innovation Funding Scheme under Grant 2022A0505030021

Research Keywords

Microstrip antennas
mutual coupling
radiation pattern
two-dimensional array

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10.1109/TAP.2024.3484680

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title = "A Full Design Perspective of Port Decoupling for MIMO Antennas: Preservation of Radiation Pattern",

abstract = "Whereas most studies of decoupling methods in antenna designs are limited to port isolation, this paper additionally investigates the radiation-pattern-decoupling (RPD) method to preserve the radiation pattern in a port-decoupling design. The RPD method introduce shorting vias to obtain a new current component for canceling the coupled current, leaving the original active current on the coupled antenna element. As a result, each element effectively has its own active current only, minimizing the coupling effects on the antenna port and radiation pattern. For demonstration, this RPD method is applied to a MIMO design using broadside microstrip antennas. Both 1×2 and 4×4 MIMO arrays are considered, with reasonable agreement between the measured and simulated results. Both of the arrays have an overlapping impedance and isolation bandwidth of more than 5%, with the portion isolation higher than 16.5 dB. {\textcopyright} 2024 IEEE.",

keywords = "Microstrip antennas, mutual coupling, radiation pattern, two-dimensional array",

author = "Guang-Yao Liu and Nan Yang and Leung, {Kwok Wa} and Luk, {Kwai Man}",

year = "2024",

month = dec,

doi = "10.1109/TAP.2024.3484680",

language = "English",

volume = "72",

pages = "9164--9176",

journal = "IEEE Transactions on Antennas and Propagation",

issn = "0018-926X",

publisher = "IEEE",

number = "12",

}

TY - JOUR

T1 - A Full Design Perspective of Port Decoupling for MIMO Antennas

T2 - Preservation of Radiation Pattern

AU - Liu, Guang-Yao

AU - Yang, Nan

AU - Leung, Kwok Wa

AU - Luk, Kwai Man

PY - 2024/12

Y1 - 2024/12

N2 - Whereas most studies of decoupling methods in antenna designs are limited to port isolation, this paper additionally investigates the radiation-pattern-decoupling (RPD) method to preserve the radiation pattern in a port-decoupling design. The RPD method introduce shorting vias to obtain a new current component for canceling the coupled current, leaving the original active current on the coupled antenna element. As a result, each element effectively has its own active current only, minimizing the coupling effects on the antenna port and radiation pattern. For demonstration, this RPD method is applied to a MIMO design using broadside microstrip antennas. Both 1×2 and 4×4 MIMO arrays are considered, with reasonable agreement between the measured and simulated results. Both of the arrays have an overlapping impedance and isolation bandwidth of more than 5%, with the portion isolation higher than 16.5 dB. © 2024 IEEE.

AB - Whereas most studies of decoupling methods in antenna designs are limited to port isolation, this paper additionally investigates the radiation-pattern-decoupling (RPD) method to preserve the radiation pattern in a port-decoupling design. The RPD method introduce shorting vias to obtain a new current component for canceling the coupled current, leaving the original active current on the coupled antenna element. As a result, each element effectively has its own active current only, minimizing the coupling effects on the antenna port and radiation pattern. For demonstration, this RPD method is applied to a MIMO design using broadside microstrip antennas. Both 1×2 and 4×4 MIMO arrays are considered, with reasonable agreement between the measured and simulated results. Both of the arrays have an overlapping impedance and isolation bandwidth of more than 5%, with the portion isolation higher than 16.5 dB. © 2024 IEEE.

KW - Microstrip antennas

KW - mutual coupling

KW - radiation pattern

KW - two-dimensional array

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DO - 10.1109/TAP.2024.3484680

M3 - RGC 21 - Publication in refereed journal

SN - 0018-926X

VL - 72

SP - 9164

EP - 9176

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

IS - 12

ER -

A Full Design Perspective of Port Decoupling for MIMO Antennas: Preservation of Radiation Pattern

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GRF: Investigation of Dielectric Resonator Antenna Arrays for Wireless Communications

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A Full Design Perspective of Port Decoupling for MIMO Antennas: Preservation of Radiation Pattern

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GRF: Investigation of Dielectric Resonator Antenna Arrays for Wireless Communications

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