PONE-D-23-25130A large-scale MIMO antenna system for 5G IoT applicationsPLOS ONE

Dear Dr. Tran-Huy,

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PLOS ONE

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Additional Editor Comments:

Improve the English.

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Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: Yes

Reviewer #2: Yes

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: Yes

Reviewer #2: Yes

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3. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: Yes

Reviewer #2: Yes

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4. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: Yes

Reviewer #2: Yes

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5. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: The authors presented a closely spaced MIMO antenna and its mutual coupling reduction with the help of a half-wavelength microstrip line and a quarter-wavelength grounded stub. The manuscript is well-written and the data has been organized well. The presented results are quite interesting. However, the reviewer has some comments for the improvements.

(1) What is the log tangent value of the antenna substrate? Did authors use the same substrate and thickness for the all MIMO designs?

(2) Comment on the measurement setup of the antenna.

(3) Cite a proper reference for the equations used for the computation of the ECC/DG etc.

(4) What is the unit of antenna profile in Table 1? Is it mm or the wavelength ?

(5) The maximum isolation of the MIMO antenna is more than 25 dB as it is evident from the Figure 17. Why did the authors have stated maximum isolation as 20 dB in Table 1? Please explain.

(6) Which shortwave was used for the simulation?

Reviewer #2: The authors presented a low coupling MIMO antenna that can be easily extendable to a large-scale MIMO antenna system targeting 5G applications and IoT systems. The paper is well written, all the idea and concept is presented in professional way backed by strong mathematical explanation along with state-of-the-art.

There are few things that need to explain further:

1: Cite the reference from where the equations 1-3 are extracted.

2: Please comment on the bandwidth variation observed when the 2 x 2 MIMO array is extended to 2 X 3 MIMO array.

3: The decoupling is improved only at the desired bandwidth, what could be possible solution to improve the decoupling at the nearby frequency. Please comment.

4: The authors should cite the proper reference from where the equation 4 and 5 are extracted.

5: Since the work is focused on MIMO antenna, authors should add other MIMO performance parameters including Mean effective gain as explained in Highly selective multiple-notched UWB-MIMO antenna with low correlation using an innovative parasitic decoupling structure, 2023. Or the Channel capacity loss as explined in Self-decoupled tri band MIMO antenna operating over ISM, WLAN and C-band for 5G applications, 2023.

6: Explain the reason of discrepancy among simulated and measured results of s-parameters. How it can be minimise?

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Reviewer #1: No

Reviewer #2: Yes: Wahaj Abbas Awan

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A large-scale MIMO antenna system for 5G IoT applications

PONE-D-23-25130R1

Dear Dr. Tran-Huy,

We’re pleased to inform you that your manuscript has been judged scientifically suitable for publication and will be formally accepted for publication once it meets all outstanding technical requirements.

Within one week, you’ll receive an e-mail detailing the required amendments. When these have been addressed, you’ll receive a formal acceptance letter and your manuscript will be scheduled for publication.

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Kind regards,

Musa Hussain

Academic Editor

PLOS ONE

Additional Editor Comments (optional):

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

1. If the authors have adequately addressed your comments raised in a previous round of review and you feel that this manuscript is now acceptable for publication, you may indicate that here to bypass the “Comments to the Author” section, enter your conflict of interest statement in the “Confidential to Editor” section, and submit your "Accept" recommendation.

Reviewer #1: (No Response)

Reviewer #2: All comments have been addressed

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2. Is the manuscript technically sound, and do the data support the conclusions?

The manuscript must describe a technically sound piece of scientific research with data that supports the conclusions. Experiments must have been conducted rigorously, with appropriate controls, replication, and sample sizes. The conclusions must be drawn appropriately based on the data presented.

Reviewer #1: (No Response)

Reviewer #2: Yes

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3. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: (No Response)

Reviewer #2: Yes

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4. Have the authors made all data underlying the findings in their manuscript fully available?

The PLOS Data policy requires authors to make all data underlying the findings described in their manuscript fully available without restriction, with rare exception (please refer to the Data Availability Statement in the manuscript PDF file). The data should be provided as part of the manuscript or its supporting information, or deposited to a public repository. For example, in addition to summary statistics, the data points behind means, medians and variance measures should be available. If there are restrictions on publicly sharing data—e.g. participant privacy or use of data from a third party—those must be specified.

Reviewer #1: (No Response)

Reviewer #2: Yes

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5. Is the manuscript presented in an intelligible fashion and written in standard English?

PLOS ONE does not copyedit accepted manuscripts, so the language in submitted articles must be clear, correct, and unambiguous. Any typographical or grammatical errors should be corrected at revision, so please note any specific errors here.

Reviewer #1: (No Response)

Reviewer #2: Yes

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6. Review Comments to the Author

Please use the space provided to explain your answers to the questions above. You may also include additional comments for the author, including concerns about dual publication, research ethics, or publication ethics. (Please upload your review as an attachment if it exceeds 20,000 characters)

Reviewer #1: The authors have revised the manuscript well. All concerns of the reviewer have been addressed. The manuscript is up to date and can be accepted for publication in current form.

Reviewer #2: The authors carefully address all the concerns of the reviewer, thus, the paper is accepted and recommended for publication.

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7. PLOS authors have the option to publish the peer review history of their article (what does this mean?). If published, this will include your full peer review and any attached files.

If you choose “no”, your identity will remain anonymous but your review may still be made public.

Do you want your identity to be public for this peer review? For information about this choice, including consent withdrawal, please see our Privacy Policy.

Reviewer #1: No

Reviewer #2: No

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