Micromachined mmWave 28.0/38.0 GHz MIMO Antenna Loaded with Novel Frequency Selective Surface for Gain Enhancement and SAR Analysis for Future Wireless Applications

PLOS One

Dear Dr. Ali,

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Neng Ye

Academic Editor

PLOS One

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Additional Editor Comments:

Thanks for your submitting. As mentioned by the reviewers ,there's still some problems needed to be fixed in your paper.I noticed that the main issues are the insufficient introduction to the current research status, as well as the inadequate explanation of technical details and advantages. Please make revisions to meet the publication standards.

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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?

Reviewer #1: Yes

Reviewer #2: Partly

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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

Reviewer #1: Yes

Reviewer #2: Yes

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

Reviewer #1: Yes

Reviewer #2: Yes

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Reviewer #1: The authors present the work titled "Micromachined mmWave 28.0/38.0 GHz MIMO Antenna Loaded with Frequency Selective Surface for Gain Enhancement and SAR Analysis for Future Wireless Applications." The concept is promising and relevant; however, I have the following suggestions for improvement:

Title Revision: Please remove the word "novel" from the title regarding the FSS, as these unit cells are already well-studied in the literature.

Introduction: The contributions listed in the introduction are currently too long. Please condense this section to a maximum of four key contributions.

Literature Review: The authors should expand the discussion on recently published works regarding mmWave antennas with FSS reflectors. The following articles are recommended to add value to the introduction:

a. https://doi.org/10.1016/j.hspr.2025.08.004

b. https://doi.org/10.1007/s10762-025-01079-z

c. https://doi.org/10.3390/math9243301

Technical Data: Please provide the reflection phase characteristics of the proposed FSS unit cell.

Reviewer #2: This paper proposes a dual-band four-port millimeter-wave MIMO antenna that achieves significant gain enhancement and systematically evaluates key MIMO performance metrics. The manuscript is well structured, the design procedure is clearly presented, and the parametric analysis is relatively comprehensive. However, the following issues should be addressed.

1. In the Introduction, the related literature is mainly classified based on research topics. It is recommended that the authors further compare these works by discussing their respective advantages and limitations, so as to more clearly highlight the novelty and contributions of this paper.

2. In Section 5, the description of the micro-machining process is rather vague. More details regarding the specific fabrication methods and key process parameters should be provided. In addition, please ensure consistency in the terminology, and clarify whether “micro-machined” should be written with or without a hyphen.

3. The SAR analysis is relatively brief. The authors should explicitly specify the input power level used in the SAR simulations and clarify whether the SAR results are normalized. Otherwise, the reported SAR values cannot be fairly compared with those in other studies.

4. This paper designs a high-isolation, high-gain MIMO antenna, which effectively reduces inter-user interference. It is suggested that the authors strengthen the theoretical foundation supporting this conclusion by citing relevant works, such as “Achieving Positive Rate of Covert Communications Covered by Randomly Activated Overt Users” and “Energy Efficiency of Massive Random Access in MIMO Quasi-Static Rayleigh Fading Channels With Finite Blocklength”, to make the claims more convincing.

5. Please pay more attention to writing conventions and consistency. For example, the reference citation format is inconsistent in the Introduction, where references [1] and [3] are used differently. In addition, some abbreviations (e.g., ECC) are not defined when they first appear in the text.

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what does this mean? ). If published, this will include your full peer review and any attached files.

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Reviewer #1: No

Reviewer #2: No

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Micromachined mmWave 28.0/38.0 GHz MIMO Antenna Loaded with Frequency Selective Surface for Gain Enhancement and SAR Analysis for Future Wireless Applications

PONE-D-25-52779R1

Dear Dr. Ali,

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,

Neng Ye

Academic Editor

PLOS One

Additional Editor Comments (optional):

The authors have addressed all the comments. I'm OK with this version.

Reviewers' comments:

Reviewer's Responses to Questions

Comments to the Author

Reviewer #1: All comments have been addressed

Reviewer #2: All comments have been addressed

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

Reviewer #1: Yes

Reviewer #2: Yes

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

Reviewer #1: Yes

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

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??>

Reviewer #1: Yes

Reviewer #2: Yes

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Reviewer #1: The authors have revised the comments carefully. The paper can be accepted in its current form…….…….

Reviewer #2: The authors have satisfactorily addressed all comments, and I am satisfied with this revised version.

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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: Yes: Ahmed Jamal Abdullah Al-Gburi

Reviewer #2: No

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