A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays

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Abstract

A decoupling method using wavetrap technique for large-scale multiple-input multiple-output (MIMO) antenna arrays consisting of 45°-polarized patch antennas is presented and studied in this paper. To achieve high isolation responses among the array elements, simple wavetrap structures are proposed and positioned around each patch elements. With the presented decoupling scheme, the strong mutual coupling between both adjacent and non-adjacent patch elements are suppressed to a low level. Theoretical and numerical studies are carried out to verify the decoupling performance of the proposed architecture. For demonstration purposes, two practical examples of 1×8 and 4×2 45°-polarized arrays centered at 4.9 GHz are developed, fabricated and measured. Results indicate that the mutual coupling among the arrays is significantly suppressed to less than ‒25 dB from 4.8 to 5.0 GHz, with a small insertion loss of around 0.7 dB, making the proposed decoupling scheme attractive and valuable for massive MIMO systems.
Original languageEnglish
JournalIEEE Transactions on Antennas and Propagation
ISSN0018-926X
DOIs
Publication statusE-pub ahead of print - 25 Oct 2019

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Microstrip antennas
Insertion losses
Antenna arrays
Demonstrations

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@article{9bd1e241465b40f1a7e690d1d1c791dc,
title = "A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays",
abstract = "A decoupling method using wavetrap technique for large-scale multiple-input multiple-output (MIMO) antenna arrays consisting of 45°-polarized patch antennas is presented and studied in this paper. To achieve high isolation responses among the array elements, simple wavetrap structures are proposed and positioned around each patch elements. With the presented decoupling scheme, the strong mutual coupling between both adjacent and non-adjacent patch elements are suppressed to a low level. Theoretical and numerical studies are carried out to verify the decoupling performance of the proposed architecture. For demonstration purposes, two practical examples of 1×8 and 4×2 45°-polarized arrays centered at 4.9 GHz are developed, fabricated and measured. Results indicate that the mutual coupling among the arrays is significantly suppressed to less than ‒25 dB from 4.8 to 5.0 GHz, with a small insertion loss of around 0.7 dB, making the proposed decoupling scheme attractive and valuable for massive MIMO systems.",
author = "Yiming Zhang and Shuai Zhang and Jia-Lin Li and Pedersen, {Gert Fr{\o}lund}",
year = "2019",
month = "10",
day = "25",
doi = "10.1109/TAP.2019.2948531",
language = "English",
journal = "I E E E Transactions on Antennas and Propagation",
issn = "0018-926X",
publisher = "IEEE",

}

A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays. / Zhang, Yiming; Zhang, Shuai; Li, Jia-Lin; Pedersen, Gert Frølund.

In: IEEE Transactions on Antennas and Propagation, 25.10.2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays

AU - Zhang, Yiming

AU - Zhang, Shuai

AU - Li, Jia-Lin

AU - Pedersen, Gert Frølund

PY - 2019/10/25

Y1 - 2019/10/25

N2 - A decoupling method using wavetrap technique for large-scale multiple-input multiple-output (MIMO) antenna arrays consisting of 45°-polarized patch antennas is presented and studied in this paper. To achieve high isolation responses among the array elements, simple wavetrap structures are proposed and positioned around each patch elements. With the presented decoupling scheme, the strong mutual coupling between both adjacent and non-adjacent patch elements are suppressed to a low level. Theoretical and numerical studies are carried out to verify the decoupling performance of the proposed architecture. For demonstration purposes, two practical examples of 1×8 and 4×2 45°-polarized arrays centered at 4.9 GHz are developed, fabricated and measured. Results indicate that the mutual coupling among the arrays is significantly suppressed to less than ‒25 dB from 4.8 to 5.0 GHz, with a small insertion loss of around 0.7 dB, making the proposed decoupling scheme attractive and valuable for massive MIMO systems.

AB - A decoupling method using wavetrap technique for large-scale multiple-input multiple-output (MIMO) antenna arrays consisting of 45°-polarized patch antennas is presented and studied in this paper. To achieve high isolation responses among the array elements, simple wavetrap structures are proposed and positioned around each patch elements. With the presented decoupling scheme, the strong mutual coupling between both adjacent and non-adjacent patch elements are suppressed to a low level. Theoretical and numerical studies are carried out to verify the decoupling performance of the proposed architecture. For demonstration purposes, two practical examples of 1×8 and 4×2 45°-polarized arrays centered at 4.9 GHz are developed, fabricated and measured. Results indicate that the mutual coupling among the arrays is significantly suppressed to less than ‒25 dB from 4.8 to 5.0 GHz, with a small insertion loss of around 0.7 dB, making the proposed decoupling scheme attractive and valuable for massive MIMO systems.

U2 - 10.1109/TAP.2019.2948531

DO - 10.1109/TAP.2019.2948531

M3 - Journal article

JO - I E E E Transactions on Antennas and Propagation

JF - I E E E Transactions on Antennas and Propagation

SN - 0018-926X

ER -