Coupled Array of Diverse Elements for Wideband High Spherical Coverage

Quangang Chen; Veli Pekka Kutinlahti; Jaakko Haarla; Anu Lehtovuori; Ville Viikari

doi:10.1109/OJAP.2023.3303929

Coupled Array of Diverse Elements for Wideband High Spherical Coverage

Quangang Chen, Veli Pekka Kutinlahti, Jaakko Haarla, Anu Lehtovuori, Ville Viikari

VTT Technical Research Centre of Finland

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

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Abstract

We propose a flexible cluster array concept utilizing diverse antenna elements and the mutual coupling among them to improve the spherical coverage. This innovative approach can not only enhance the impedance matching but also improve the beamforming performance across a wide frequency band by adjusting excitation amplitudes and phases. Equations are derived to achieve specific objectives such as minimizing the total active reflection coefficient or maximizing the realized gain of an antenna array. To validate the concept, we employ a cluster array consisting of eight non-identical patch antenna elements with strong mutual coupling. When compared to a conventional four-element patch antenna array of the same size, the cluster array exhibits high beamforming capability over a wider frequency band. Simulated and measured results confirm that the operational frequency band can be extended from 24.5-26.5 GHz to 24.5-29.5 GHz, while maintaining a spherical coverage of over 6 dBi at the 50%-tile cumulative distribution function (CDF) of maximum realized gain.

Original language	English
Pages (from-to)	815-823
Number of pages	9
Journal	IEEE Open Journal of Antennas and Propagation
Volume	4
Early online date	2023
DOIs	https://doi.org/10.1109/OJAP.2023.3303929
Publication status	Published - 2023
MoE publication type	A1 Journal article-refereed

Keywords

Antenna arrays
Antennas
Array signal processing
beamforming
Broadband antennas
CDF
mm-wave
Multiport antenna
Mutual coupling
mutual coupling
reconfigurable antenna
Reflection coefficient
Reflector antennas

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10.1109/OJAP.2023.3303929Licence: CC BY

Coupled_Array_of_Diverse_Elements_for_Wideband_High_Spherical_CoverageFinal published version, 1.2 MBLicence: CC BY

Cite this

@article{fe889bcc36c1405abcecee34b80e88a4,

title = "Coupled Array of Diverse Elements for Wideband High Spherical Coverage",

abstract = "We propose a flexible cluster array concept utilizing diverse antenna elements and the mutual coupling among them to improve the spherical coverage. This innovative approach can not only enhance the impedance matching but also improve the beamforming performance across a wide frequency band by adjusting excitation amplitudes and phases. Equations are derived to achieve specific objectives such as minimizing the total active reflection coefficient or maximizing the realized gain of an antenna array. To validate the concept, we employ a cluster array consisting of eight non-identical patch antenna elements with strong mutual coupling. When compared to a conventional four-element patch antenna array of the same size, the cluster array exhibits high beamforming capability over a wider frequency band. Simulated and measured results confirm that the operational frequency band can be extended from 24.5-26.5 GHz to 24.5-29.5 GHz, while maintaining a spherical coverage of over 6 dBi at the 50%-tile cumulative distribution function (CDF) of maximum realized gain.",

keywords = "Antenna arrays, Antennas, Array signal processing, beamforming, Broadband antennas, CDF, mm-wave, Multiport antenna, Mutual coupling, mutual coupling, reconfigurable antenna, Reflection coefficient, Reflector antennas",

author = "Quangang Chen and Kutinlahti, {Veli Pekka} and Jaakko Haarla and Anu Lehtovuori and Ville Viikari",

note = "Publisher Copyright: Author",

year = "2023",

doi = "10.1109/OJAP.2023.3303929",

language = "English",

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pages = "815--823",

journal = "IEEE Open Journal of Antennas and Propagation",

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T1 - Coupled Array of Diverse Elements for Wideband High Spherical Coverage

AU - Chen, Quangang

AU - Kutinlahti, Veli Pekka

AU - Haarla, Jaakko

AU - Lehtovuori, Anu

AU - Viikari, Ville

N1 - Publisher Copyright: Author

PY - 2023

Y1 - 2023

N2 - We propose a flexible cluster array concept utilizing diverse antenna elements and the mutual coupling among them to improve the spherical coverage. This innovative approach can not only enhance the impedance matching but also improve the beamforming performance across a wide frequency band by adjusting excitation amplitudes and phases. Equations are derived to achieve specific objectives such as minimizing the total active reflection coefficient or maximizing the realized gain of an antenna array. To validate the concept, we employ a cluster array consisting of eight non-identical patch antenna elements with strong mutual coupling. When compared to a conventional four-element patch antenna array of the same size, the cluster array exhibits high beamforming capability over a wider frequency band. Simulated and measured results confirm that the operational frequency band can be extended from 24.5-26.5 GHz to 24.5-29.5 GHz, while maintaining a spherical coverage of over 6 dBi at the 50%-tile cumulative distribution function (CDF) of maximum realized gain.

AB - We propose a flexible cluster array concept utilizing diverse antenna elements and the mutual coupling among them to improve the spherical coverage. This innovative approach can not only enhance the impedance matching but also improve the beamforming performance across a wide frequency band by adjusting excitation amplitudes and phases. Equations are derived to achieve specific objectives such as minimizing the total active reflection coefficient or maximizing the realized gain of an antenna array. To validate the concept, we employ a cluster array consisting of eight non-identical patch antenna elements with strong mutual coupling. When compared to a conventional four-element patch antenna array of the same size, the cluster array exhibits high beamforming capability over a wider frequency band. Simulated and measured results confirm that the operational frequency band can be extended from 24.5-26.5 GHz to 24.5-29.5 GHz, while maintaining a spherical coverage of over 6 dBi at the 50%-tile cumulative distribution function (CDF) of maximum realized gain.

KW - Antenna arrays

KW - Antennas

KW - Array signal processing

KW - beamforming

KW - Broadband antennas

KW - CDF

KW - mm-wave

KW - Multiport antenna

KW - Mutual coupling

KW - mutual coupling

KW - reconfigurable antenna

KW - Reflection coefficient

KW - Reflector antennas

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U2 - 10.1109/OJAP.2023.3303929

DO - 10.1109/OJAP.2023.3303929

M3 - Article

AN - SCOPUS:85167775462

SN - 2637-6431

VL - 4

SP - 815

EP - 823

JO - IEEE Open Journal of Antennas and Propagation

JF - IEEE Open Journal of Antennas and Propagation

ER -

Coupled Array of Diverse Elements for Wideband High Spherical Coverage

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Study Findings on Telecommunication Discussed by Researchers at Aalto University (Coupled Array of Diverse Elements for Wideband High Spherical Coverage)

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Coupled Array of Diverse Elements for Wideband High Spherical Coverage

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Study Findings on Telecommunication Discussed by Researchers at Aalto University (Coupled Array of Diverse Elements for Wideband High Spherical Coverage)

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RF Sampo: Kumppanuusmalli RF Sampo