An Overview of Design Techniques for Two-Dimensional Leaky-Wave Antennas

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

In this paper, the design techniques of leaky wave antennas are reviewed, the numerical techniques of leaky wave antennas are analyzed, and the effectiveness of leaky wave antennas can be verified by full wave simulation. An effective solution for low-profile radiation for broadband and frequency-scanning applications, covering frequencies from microwave to terahertz. In my opinion, this work falls within the scope of the MDPI and should be published after a major revision. Here are a few suggestions and clarifications that must be addressed before publication.

1. For the leakage wave number kρ=β−jα, β and α are only mentioned and their importance, and no definite determination method is given.

2. The position of Figure 2 is not very suitable, and it is placed after the end of the reference to the content of Figure 1, which can make the reader at a glance.

3. The definition of kz0 is not given in formula (10) and (11)

4. For leaky antenna in Category 3.1, some diagrams can be added to help readers more intuitively understand the structure and working principle of different types of leaky antenna.

5. The validity of the theoretical model is verified by full wave simulation in section 3.5, which provides strong support for the conclusion of the paper. It is possible to add some experimental verification parts to further verify the accuracy of the theoretical and numerical methods.

6. The technology proposed in this paper has the potential to be applied to programmable diffractive neural networks. Please discuss it in conjunction with the following work to expand the application of this paper (DOI: 10.1126/sciadv.ado3937; DOI: 10.1038/s41928-023-00951-x).

Author Response

Please refer to the attached Response Letter.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

 

The topic of this manuscript entitled: "An Overview of Design Techniques for Two-Dimensional Leaky-Wave Antennas" falls within the profile and scope of the Applied Sciences.

Recommendation – Consider after minor changes

Comment:

The article treats about leaky-wave antennas. It should be pointed out what was the idea (purpose) for publishing this material taking into account that the leaky-wave antennas were analyzed in many articles and books.

The first impression when reading the text is that there is no idea to what application this work is addressed. Especially, that the leaky-wave antennas were analyzed in many articles and books. From this point of view it could be misjudgment to review already published works.

However, taking into account the short explanation in Conclusions that presented material should be treated as a simple guideline when designing the leaky-wave antennas is satisfying. Authors have completed theoretical, numerical and simulative analyses for different antennas like uniform, quasi-uniform, and radially periodic two-dimensional leaky-wave antennas.

Authors verified presented investigation basing on full-wave simulations, but the question is if any experiment was realized in practice to confirm obtained data.

Have you verified experimentally any analytical attempt?

Author Response

Please refer to the attached Response Letter.

Author Response File: Author Response.pdf