Gain Enhancement of a Dual-Band Antenna with the FSS
Round 1
Reviewer 1 Report
The paper presents a dual-band antenna based on FSS for ISM applications. The authors used well know approaches (e.g., Frequency Selective Surface structure to improve the total gain and bandwidth of the proposed antenna.
· The review of the literature is not thorough. Not all related work is well supported by relevant references, so the reader is not given an adequate background about the topic. This is important as it increases the accessibility to readers without strong background in the relevant area. The following are examples of references that provide dual band operation (S-band) and good radiation performance. These should be included in Table 2 and compared with the proposed antenna design.
1) S. Liu et al. “Dual-Band Folded-End Dipole Antenna for Plastic CubeSats”, IEEE JMASS, Vol. 1, no. 1., 2020.
https://ieeexplore-ieee-org.ezproxy.uow.edu.au/stamp/stamp.jsp?tp=&arnumber=9187821
2) O. Khan et al. “Multiband High-Gain Printed Yagi Array Using Square Spiral Ring Metamaterial Structures for S-Band Applications”, IEEE Antennas and Wireless Propagation Letters, vol. 13, 2014. https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6832442
· The paper requires proofreading as it contains grammar errors.
· The paper is not will presented. Figures require improvement.
· The authors show only the effect of the “Bottom_L1” but they did not show the parametric analysis of other parameters.
· The paper lacks in depth analysis of the results.
· Some figures are poorly presented. For example, figures 7 is blurred. For more details, see my comments below:
Other comments
1. Introduction
· Line 25 and 28, avoid the use of run-on expression in academic writing “so on”.
· Line 26, change “its” to “their”.
· Line 35, change “its complex structures” to “its complex structures”
· Line 54, add “and” before “ 44 dB to 9.0 dB”
2. Antenna and FSS Design
· Line 61, change “lays” to “layers”
· In lines 63 and 66 you are talking about first layers, but you mentioned two different dielectric constants. I think the authors meant to say layer 2 in line 66. PLEASE proofread your paper. It has many grammar errors and typo.
· Figure 1. (c) and (d”) are not shown on the figure.
· The text on Figure 1 is too small to read. Also, some parameters are now shown (e.g., width of the feedline, dimensions if the frequency selective surface cell,…etc”
· The description and analysis of figure 2 is very limited and incomplete. Please provide more detailed analysis about the current distributions at two frequencies.
3. Simulated and Measured Results
· Lines 138 and 139, when analyzing Figure 6, it is mentioned that “but has little influence on the antenna impedance at 5.8 GHz.”, however, this is not shown in Figure 6 as the frequency ranging from 2.1 to 2.8 GHz. You need to support this claim.
· Figure 7 is blurred and needs to be improved. Why the generator and analyser are inside the chamber. Also, what measurements authors obtained using Spectrum analyzer?
· The title of Figure 8 is vague.
· Figure 9. Section (c) is not shown on the figure.
· Figure 10 does not show the gain over the whole frequency range 1-7 GHz. Authors need to show the gain over the whole frequency range as well as the 3dB gain bandwidth.
· Table 2, the authors should present the size of the antennas in terms of their operating wavelengths.
· What is the polarization of the antenna?
4. Conclusion
· It is not well structured. The obtained results should be mentioned again in the conclusion. Your conclusions should be supported by the obtained results.
Author Response
Dear reviewer,
How are you!
We are very grateful to receive a lot valuable comment from you. We have tried our best to improve the manuscript. Please kindly find our point-to-point replies in the following. Thank you very much!
Best regards,
Changjun Liu
Prof. & Ph.D.
Sichuan University
- The review of the literature is not thorough. Not all related work is well supported by relevant references, so the reader is not given an adequate background about the topic. This is important as it increases the accessibility to readers without strong background in the relevant area. The following are examples of references that provide dual band operation (S-band) and good radiation performance. These should be included in Table 2 and compared with the proposed antenna design.
Response: Considering the Reviewer’s suggestions, we have added five related references in the Introduction part. Meanwhile, we added a more detailed explanations about the references for readers without strong backgrounds. Moreover, these two related examples given by Reviewers are added in Table 2.
2. The paper requires proofreading as it contains grammar errors.
Response: We are very sorry for these grammar errors. As we are not native speaks, we have tried our best to improve the manuscript. Moreover, we have asked a professional company (Edanz Corp.) to help us correcting the errors.
3. The paper is not will presented. Figures require improvement.
Response: We are sorry for this. Figures have got improved in article. Figure 1b has been remade to make the text clear. Two graphs were added into Figure9.Figure 10 has been remade and the measurement devices were marked out. And we marked out the 3dB gain bandwidth in Figure 13.
4. The authors show only the effect of the “Bottom_L1” but they did not show the parametric analysis of other parameters
Response: It is really a great suggestion as Reviews pointed out that parametric analysis of parameters is too less. Thus, we added more parametric analysis about two important parameters of antenna performance. They are “amount of FSS unit cells” and distance “h” between antenna and FSS. More details are shown in the Line 177-204, and four graphs are given to display the two parameters’ effects on antenna.
- The paper lacks in depth analysis of the results.
Response: We agree that the paper needs more depth analysis of results. we have added more analysis about results of the current distribution, gain and so on.
The current distribution depth analysis was added in Line111-118 and Line125-128, what is more, three extra graphs about current distributions were given in Figure 15, and analysis was presented in Line270-278. More measurement of gain and efficiency was presented in Figure 14, and the analysis is in Line 252-266. Moreover, the simulation results analysis was also added in Line 177-203.
- Some figures are poorly presented. For example, figures 7 is blurred. For more details, see my comments below:
Other comments
I Introduction
· Line 25 and 28, avoid the use of run-on expression in academic writing “so on”.·Response: According to your suggestion, one of “so on” were replaced. ·Line 26, change “its” to “their”.
- Response: We are very sorry for our negligence of this, we have changed it.
·Line 35, change “its complex structures” to “its complex structures”
Response: We have changed “its” to “their”.
- Line 54, add “and” before “ 44 dB to 9.0 dB”
Response: We are sorry if we understand wrongly, there is already “and” before “4.4 to 9.0dB”.
II Antenna and FSS Design
· Line 61, change “lays” to “layers”
Response: We are very sorry for our English writing. They have been corrected. Thanks a lot!
7. In lines 63 and 66 you are talking about first layers, but you mentioned two different dielectric constants. I think the authors meant to say layer 2 in line 66. PLEASE proofread your paper. It has many grammar errors and typo.
Response: We are very sorry for these grammar errors and typos. It is layer 2 actually. We have revised it. And we have proofread our manuscript again.
8. Figure 1. (c) and (d”) are not shown on the figure
Response: We are sorry for our negligence of this. We have added them.
9. The text on Figure 1 is too small to read. Also, some parameters are now shown (e.g., width of the feedline, dimensions if the frequency selective surface cell,…etc”
Response: According to your suggestions, we have redrawn Figure 1 to make the text more clear.
10. The description and analysis of figure 2 is very limited and incomplete. Please provide more detailed analysis about the current distributions at two frequencies.
Response: As Reviewer suggested, more detailed analysis about current distributions were added in Line111-118 and Line125-128, what is more, three extra graphs about current distributions were given in Figure 15, and analysis is present in Line270-278.
III Simulated and Measured Results· Lines 138 and 139, when analyzing Figure 6, it is mentioned that “but has little influence on the antenna impedance at 5.8 GHz.”, however, this is not shown in Figure 6 as the frequency ranging from 2.1 to 2.8 GHz. You need to support this claim.·Response: It is a good suggestion that we need to support the claim. Two graphs that shows the impedance at 5.8GHz were added in Figure 9 (Fig. 6 in original version) and discussed. As shown in Figure 9, the impedance at 5.5GHz maintains 50 Ohm when “Botm_L1”and frequency changes, different with impedance at 2.45GHz. Although input impedance at 2.45GHz bands is close to 50Ohm, it is floating with frequency, which means the resonance frequency may not is 2.45GHz exactly, thus we could adjust the first resonance frequency point by turning “Botm_L1”. ·Figure 7 is blurred and needs to be improved. Why the generator and analyzer are inside the chamber. Also, what measurements authors obtained using Spectrum analyzer?·Response: We agree that Figure 7 and needs to be improved. However, our chamber is too big and dim, we have tried many times. It is still hard to take two antennas into photo clearly by our limited devices. Nevertheless, Figure 7 has been remade and marked out the transmitted horn antenna. Generator and analyzer are under the test platform and they are surrounded by wave-absorbing materials. They have little effects on measurement. The measurement method was added in Line220-228. The generator will produce a signal which would be transmitted by the standard horn antenna and received by the antenna under test (AUT). The spectrum analyzer will measure the magnitude of signals from AUT when AUT is rotating about two axes for measuring E and H plane pattern. Another standard horn antenna whose gain is known will repeat steps mentioned above as receiving antenna, Finally, all values will be normalized by the maximum value to draw patterns and gain of AUT is got from received signal magnitude difference between standard horn antenna and AUT. The gain can be calculated by this equation: Gain(AUT)=Gain(standard horn antennas) -Magnitudehorn(dB)+MagnitudeAUT(dB).It is based on the Friis formula. ·The title of Figure 8 is vague.·Response: It does lead to misunderstand. We have changed the title into “(a)Simulated and measured |S11| of antenna and (b)comparison of measured |S11| of antenna with and without FSS”. ·Figure 9. Section (c) is not shown on the figure
- Response: We are very sorry for our negligence of the figure missing. we have added it.
·Figure 9. Figure 10 does not show the gain over the whole frequency range 1-7 GHz. Authors need to show the gain over the whole frequency range as well as the 3dB gain bandwidth. Response: Figure 9 was remade. We have measured the gain over the frequency range 2-7GHz by step 0.1GHz and the data are displayed in Figure 13. The antenna without FSS was measured too for comparison. According to your suggestions, 3dB bandwidth are marked out in Figure 13 as well. ·Table 2, the authors should present the size of the antennas in terms of their operating wavelengths. Response: It is a good idea! We presented the size of the antennas by their operating wavelength. ·What is the polarization of the antenna?·Response: As mentioned in current distribution analysis, Line111-118.and Line 125-128, the current at 2.45GHz is mainly distributed on the two sides which are vertical to bottom side, they are equivalent to a monopole. The current at 5.8GHz, is mainly distributed on the stub. They all indicate that the antenna is linear polarized. What is more, as shown in Figure 15a, the current on FSS is mainly distributed on two parallel sides of square loop unit. It also reveals that the polarization of the antenna is linear polarization. IV Conclusion· It is not well structured. The obtained results should be mentioned again in the conclusion. Your conclusions should be supported by the obtained results.
- Response: As suggested by you, the obtained results of this article are mentioned again in the conclusion in Line297-303.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The authors presented a Gain Enhancement of a Dual-Band Antenna with the FSS. The novelty and the contribution are too low for this article. Besides, many papers have already proposed the same idea. The idea of this paper is simple: Antenna+FSS= High gain. The FSS unit cell is too basic, which is a square loop structure!!!!
I will give a chance to the authors to improve the paper, which may be accepted for publication after being carefully revised. My comments are as follows:
1. Introduction
- The introduction needs to be improved. The authors must explain some frequency selective surfaces (FSSs) reflectors and study their parameters, such as gain and bandwidth [1,2]. The gain enhancement techniques using FSS must also be clearly discussed when FSS acts as a reflector [3]. Please see these references, which may add value to the Introduction:
[1] A Wideband High-Gain Microstrip Array Antenna Integrated with Frequency-Selective Surface for Sub-6 GHz 5G Applications. Micromachines 2022, 13, 1215. https://doi.org/10.3390/mi13081215.
[2] Dual-Band Single-Layer Fractal Frequency Selective Surface for 5G Applications. Electronics 2021, 10, 2880. https://doi.org/10.3390/electronics10222880.
[3] Enhancing Gain for UWB Antennas Using FSS: A Systematic Review. Mathematics 2021, 9, 3301. https://doi.org/10.3390/math9243301.
-Please list the contributions of this work as in point at the end of the introduction.
2. Antenna and FSS Design
-If possible, Please provide the equivalent circuit model (ECM) of the proposed dual-band antenna.
- Please provide the magnitude of "h." parameter in mm.
-As I said, the FSS unit cell is too basic, a square loop. We should support the contributions of this paper by studying the parametric study of the proposed FSS square loop. In other words, the gap between the dual-band antenna and the FSS reflector should be denoted as an "Air-gap." However, this parameter plays a crucial role in antenna engineering gain enhancement. Please create a parametric study based on the "Air-gap" parameter and show its effect on the S-parameter and Gain, respectively.
The Gap parameter "Air-gap" values should be as follows:
1- Air-gap= 5mm.
2-Air-gap=10mm.
3-Air-gap=15mm.
4-Air-gap=20mm.
5-Air-gap=25mm.
6-Air-gap=30.
To make it straightforward, please add two graphs as a parametric study of the "Air-gap" parameter, as mentioned above.
-Moreover, as presented in the article, the number of FSS unit cells to structure the reflector is 5*5. Another parametric study should be conducted and named "Amount of FSS cells." parameter and show its effect on the S-parameter and Gain, respectively.
The "Amount of FSS cells" parameter values should be as follows:
1- 2*2.
2-3*3.
3-4*4.
4-5*5.
To make it again clear, please add two graphs as a parametric study of the "Amount of FSS cells" parameter, as mentioned earlier.
3. Simulated and Measured Results
-Please propose the simulated and measured gain graph (with and without FSS).
-Please propose the simulated and measured radiation efficiency graph(with and without FSS).
-Please illustrate the current antenna distribution with and without FSS to see the current saturated on FSS and without FSS.
-Table 2. Comparison of the proposed antenna with other works, please add two columns for "gain" and "efficiency" and compare it with the existing works of literature.
4. Conclusions
The Conclusions should be rewritten with the updated results above.
-That's all for me at this moment. However, the authors are required to revise the comments above carefully!
Author Response
Dear reviewer,
How are you!
We are very grateful to receive a lot valuable comment from you. We have tried our best to improve the manuscript. Please kindly find our point-to-point replies in the following. Thank you very much!
Best regards,
Changjun Liu
Prof. & Ph.D.
Sichuan University
1. Introduction - The introduction needs to be improved. The authors must explain some frequency selective surfaces (FSSs) reflectors and study their parameters, such as gain and bandwidth [1,2]. The gain enhancement techniques using FSS must also be clearly discussed when FSS acts as a reflector [3]. Please see these references, which may add value to the Introduction:
- Response: According to your suggestion, we added more detailed description about FSS parameters. Three references were added and discussed in Line50-67. A more comprehensive statement about FSS reflectors was added through reading the reference. References suggested by Reviewers are added into Table 2 as well.
-Please list the contributions of this work as in point at the end of the introduction.
- Response: It is really a great suggestion as Reviewer pointed out to list the contributions. The main contributions of this work are added at the end of the introduction in Line 85-91.
2. Antenna and FSS Design -If possible, Please provide the equivalent circuit model (ECM) of the proposed dual-band antenna.
- Response: Considering the Reviewer’s suggestion, we have added the ECM in Figure 2, and related analysis are presented in Line111-118,
- Please provide the magnitude of "h." parameter in mm.
- Response: We added value of “h” in mm in Line 164 and it was also given in Table 1.
-As I said, the FSS unit cell is too basic, a square loop. We should support the contributions of this paper by studying the parametric study of the proposed FSS square loop. In other words, the gap between the dual-band antenna and the FSS reflector should be denoted as an "Air-gap." However, this parameter plays a crucial role in antenna engineering gain enhancement. Please create a parametric study based on the "Air-gap" parameter and show its effect on the S-parameter and Gain, respectively. The Gap parameter "Air-gap" values should be as follows:1- Air-gap= 5mm.2-Air-gap=10mm.3-Air-gap=15mm.4-Air-gap=20mm.5-Air-gap=25mm.6-Air-gap=30.To make it straightforward, please add two graphs as a parametric study of the "Air-gap" parameter, as mentioned above.
- Response: It is really a great suggestion, we have added two graphs in Figure 8 as a parametric study, and the parametric analysis of air-gap is presented between Line192 and 202.
-Moreover, as presented in the article, the number of FSS unit cells to structure the reflector is 5*5. Another parametric study should be conducted and named "Amount of FSS cells." parameter and show its effect on the S-parameter and Gain, respectively. The "Amount of FSS cells" parameter values should be as follows:- 2*2.2-3*3.3-4*4.4-5*5. To make it again clear, please add two graphs as a parametric study of the "Amount of FSS cells" parameter, as mentioned earlier.
- Response: The parametric analysis of amount of FSS cells is done and displayed in Figure 7, and in line 176-190.
3. Simulated and Measured Results -Please propose the simulated and measured gain graph (with and without FSS).·Response: We have measured the gain over the frequency range 2-7GHz by step 0.1GHz and the data are displayed in Figure 13. The antenna without the FSS was measured for comparison as well. Meanwhile, the simulated results are also displayed in Figure 13. -Please propose the simulated and measured radiation efficiency graph(with and without FSS).·Response: As reviewer suggested that it important to offer the measured radiation efficiency. However, because our laboratory facilities are limited, we are unable to measure the radiation efficiency. Noticing that in [1] and [4], the radiation efficiency is only performed as simulation values, we proposed the simulated radiation efficiency with and without FSS in Figure 14.[1] A Wideband High-Gain Microstrip Array Antenna Integrated with Frequency-Selective Surface for Sub-6 GHz 5G Applications. Micromachines 2022, 13, 1215. https://doi.org/10.3390/mi13081215.[4] Przesmycki, R.; Bugaj, M.Crescent Microstrip Antenna for LTE-U and 5G Systems. Electronics 2022, 11, 1201. https://doi.org/10.3390/electronics11081201 -Please illustrate the current antenna distribution with and without FSS to see the current saturated on FSS and without FSS.· Response: Current distributions on the FSS and antenna with and without the FSS are added as Figure 15, and related analysis is between Line272 and 280. -Table 2. Comparison of the proposed antenna with other works, please add two columns for "gain" and "efficiency" and compare it with the existing works of literature.· Response: Considering the Reviewer’s suggestions, we added the two columns for “gain” and “efficiency” in Table 2. 4. Conclusions The Conclusions should be rewritten with the updated results above.· Response: The new measurement results were written into the conclusion. Thank you for your comments!
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Thanks for addressing the comments and improving the paper.
* Figure 10 " Antenna measurement environment in the anechoic chamber" still not clear (blurred).
* You also need to provide very clear photo of the fabricated antenna.
Author Response
Dear Reviewer,
How are you!
We are very grateful to receive a lot valuable comments from Reviewers. We have tried our best to improve the manuscript. Please kindly find our point-to-point replies in the following.
Thank you very much!
Best regards,
Changjun Liu
Prof. & Ph.D.
Sichuan University
---------------------------------------
1. Figure 10 " Antenna measurement environment in the anechoic chamber" still not clear (blurred).
Response: Considering the Reviewer’s suggestions, we improved our camera device and took photos again. Figure 10 is clear now. The measurement environment is well displayed.
2. You also need to provide very clear photo of the fabricated antenna.
Response: We added the photograph (Figure 11) of the fabricated antenna into the article. Figure 11 contains the prototype antenna (Figure 11a), the prototype of the 5×5 FSS (Figure 11b) and integration of prototype antenna and the FSS (Figure 11c).
Reviewer 2 Report
Dear Authors
Thank you for doing your best to revise the comments one by one successfully to make your paper look good enough to be published in a reputational journal like Electronics. However, there are further comments that need to be addressed carefully before publication. The comments are as follows:
- In line 43, we can't say," [10] proposed a printed Yagi antenna...etc.". This is grammatically wrong!!
I will give you an example on how to write the sentence, and you can continue based on that.
In [10], the authors proposed a printed Yagi antenna loaded with metamaterial embedded square spiral rings (SSR).
- The same problem with the other sentence is seen in line 51.
"[12] is the first and a comprehensive review article which focus on gain enhancement....etc"
Please revise it to:
" Another article was introduced in [12] and suggested a comprehensive review article focusing on gain enhancement techniques.... etc."
The same issue with line 65!!!
The same thing with this sentence, which is grammatically wrong "Figure 8. Antenna performance of various h (a) |S11| and (b) gain.
Please revise it to:" Figure 8. Antenna performance of various values of h parameter (a) |S11| and (b) gain.
I think the "h" parameter should be changed to " Air-gap".
In line 216,what is "Botm_L1"!!!1
In line 252, the "resalts" is wrong need to change it to results.
As a result, please check the English of the whole paper carefully.
- Don't propose the contribution points within the text. Please make it as in independent points, and you can follow the structure: for example:
The main contribution of this article is listed in the following:
1-
2-
3-
- The authors mentioned in the contribution part lines 86 and 88 "Air-gap", but when I look at Figure 12, the authors used "h" instead of Air-gap. Please revise it; we don't want to confuse the readers!
- The authors have drawn the equivalent circuit model of the proposed antenna, as shown in Figure 2. However, the equivalent circuit variables values should be presented. Besides, the C1, L1, and R1 circuit variables equations should also be proposed.
To make it clear, please provide:
1- Which software did the authors use to draw the equivalent circuit model? It must be presented that the proposed antenna was designed using (For example, ADS software).
2- The magnitudes of the circuit variables must be proposed.
3- The equation to calculate the equivalent circuit variables should be presented, such as (C1, L1, and R1).
Please see this article, which may help you to estimate the equations for the equivalent circuit variables:
A miniaturised UWB FSSwith stop-band characteristics for EM shielding applications. Prz. Elektrotech. 2021, 25, 142–145.
The authors must revise the given comments carefully!
Author Response
Dear Reviewer,
How are you!
We are very grateful to receive a lot valuable comments from Reviewers. We have tried our best to improve the manuscript. Please kindly find our point-to-point replies in the following. Thank you very much!
Best regards,
Changjun Liu
Prof. & Ph.D.
Sichuan University
---------------------------------------------
- In line 43, we can't say," [10] proposed a printed Yagi antenna...etc.". This is grammatically wrong!!
·Response: We are very sorry for these grammar errors. And thank you very much for these so detailed instructions. We have revised the sentences in line 44-45.
- - The same problem with the other sentence is seen in line 51.
"[12] is the first and a comprehensive review article which focus on gain enhancement.... etc."
The same issue with line 65!!!
The same thing with this sentence, which is grammatically wrong "Figure 8. Antenna performance of various h (a) |S11| and (b) gain.
I think the "h" parameter should be changed to " Air-gap".
In line 216, what is "Botm_L1"!!!1
In line 252, the "resalts" is wrong need to change it to results.
As a result, please check the English of the whole paper carefully.
·Response: We are very sorry for these grammar errors again. We have revised the same wrong expressions in the article, such as line 53, line 67 and line 72. The title of Figure 8 was changed to a grammatically correct expression. Meanwhile, the Figure8 was remade and the “h” parameter was changed to “Air-gap”. We have revised our wrong writing in line 216 and line 252. We have proofread our manuscript carefully to check the English expressions carefully.
- Don't propose the contribution points within the text. Please make it as in independent points, and you can follow the structure: for example:
The main contribution of this article is listed in the following:
1-
2-
3-
·Response: As suggested by you, we have changed the contribution points list structure like the structure mentioned above.
4.The authors mentioned in the contribution part lines 86 and 88 "Air-gap", but when I look at Figure 12, the authors used "h" instead of Air-gap. Please revise it; we don't want to confuse the readers!
·Response: It is true that it is possible to make misleading and confusion. Considering the Reviewers’ suggestion, we have changed “h” into “Air-gap” in Figure 8 and other relative sentences. 5. The authors have drawn the equivalent circuit model of the proposed antenna, as shown in Figure 2. However, the equivalent circuit variables values should be presented. Besides, the C1, L1, and R1 circuit variables equations should also be proposed.
To make it clear, please provide:
1- Which software did the authors use to draw the equivalent circuit model? It must be presented that the proposed antenna was designed using (For example, ADS software).
2- The magnitudes of the circuit variables must be proposed.
3- The equation to calculate the equivalent circuit variables should be presented, such as (C1, L1, and R1).
Please see this article, which may help you to estimate the equations for the equivalent circuit variables:
A miniaturized UWB FSS with stop-band characteristics for EM shielding applications. Prz. Elektrotech. 2021, 25, 142–145.
·Response:1-Advanced Design System software was used to design the equivalent circuit. As suggested by you, we mentioned in line 123.2-The magnitude of the circuit variables were presented in Table1.
3-The equations to calculate the equivalent circuit variables were given in the article. Equation (3)-(8) were derived and transformed form the equations in the reference mentioned by Reviewer. Although the equations in the reference are used to calculated the equivalent circuit variables of FSS, it is also suitable for our cases. The figure below is the ADS simulation results when variables’ magnitude was as displayed in Table 1.Finally, thank you very much for your detailed comments!
Author Response File: Author Response.pdf
Round 3
Reviewer 2 Report
The authors have revised the given comments successfully. However, there are still typos and spacing errors that need to be carefully checked.
Author Response
-However, there are still typos and spacing errors that need to be carefully checked.
Response: We have checked our article carefully, and we have proofread the typesetting of the article strictly according to the standard format. The typos and spacing errors have been corrected now.
Finally, thank you very much for your comments!
Author Response File: Author Response.pdf
