Highly Directive Biconic Antennas Embedded in a Dielectric
Round 1
Reviewer 1 Report
Very innovative study. Hopefully some antenna design engineer will read and make a device.
Author Response
We wish to thank Referee 1 for his/her kind wishes!
Reviewer 2 Report
The paper "Highly Directive Biconic Antennas Embedded in a Dielectricis" generally well written and complete, moving from practical applications that deal with sustainable directive wireless communications, to a detailed introduction of a theory and numerical methods, to simulation results that support the claims. I have some general questions that should be addressed by the authors:
1) The analysis is based on a biconic antenna, where two conic elements are separated by a gap. How does the size of the gap affect the propagation of the electromagnetic waves? What is a proper range to design this gap, from a minimum value up to a maximum one?
2) Is it correct to say that the emission is isotropic, looking at a plane that contains the cone base?
3) What is the typical shape that current directive radio antennas have?
4) If one wants to quantify the efficiency of your newly designed antennas, could you give some numbers?
Author Response
1) The analysis is based on a biconic antenna, where two conic elements are separated by a gap. How does the size of the gap affect the propagation of the electromagnetic waves? What is a proper range to design this gap, from a minimum value up to a maximum one?
Response: it is clear that the performances of the antenna are affected by the way in which it is supplied. The need of a gap, possibly very small, between the cones is dictated by the size of the wire connecting to the electrical source. We presume that a gap of approximately 5% of the entire size should not produce significant negative effects, but, of course, this also depends on the degree of directivity we would like to achieve. Maintaining a relatively small gap is not difficult for large devices working in the range of lower frequencies. For high frequency antennas, the setting up of good connections to the supplier starts to be a significant issue. A clarification has been added to the text.
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2) Is it correct to say that the emission is isotropic, looking at a plane that contains the cone base?
Response: after projection on the plane orthogonal to the z-axis, the evolution of the wave displays a central symmetry. A clarification has been added to the text.
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3) What is the typical shape that current directive radio antennas have?
Response: there are currently two categories of commercial directive radio antennas: on one side the traditional ones, including helix, log periodic array antennas, aperture horn antennas, reflectors and patch antennas. On the other side smart antennas, consisting in an array of elements that can offer adaptive transmission. A clarification has been added to the text.
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4) If one wants to quantify the efficiency of your newly designed antennas, could you give some numbers?
Response: the theory predicts that antennas with infinite directivity could be possibly built. Reality is a different issue, so that reasonable quantitative confirmations can only be made as the results of the first experiments are made available. Once demonstrating that such a project is established, generating these waves becomes only matter of technical efforts.
Reviewer 3 Report
In this work the authors are designing antennas towards efficient and sustainable point to pint wireless communication. The designing is useful for energy transfer between pair of devices. In this work, the authors are considering an extension of the electrodynamics equations, where exact solitonic type solutions are admitted. The results obtained indicate the significance of the proposed method. The authors have done significant work, however, the reviewer has few major concerns which must be addressed before the paper is accepted for publications. The major concerns are listed below:
1- A separate sections for motivation and contributions must be provided for better understanding of the work.
2- Extended formulation for electrodynamics must be explained in the form of text to improve the quality of the paper.
3- The quality of Figure 2 must be improved.
4- With respect to directional beamforming of signals and wireless power transfer, few papers must be cited in this work, which will enhance the understanding of beaming of the signals and wireless power transfer process. The authors are suggested to cite the below papers:
a) O. J. Pandey, V. Gautam, H. H. Nguyen, M. K. Shukla and R. M. Hegde, "Fault-Resilient Distributed Detection and Estimation Over a SW-WSN Using LCMV Beamforming," in IEEE Transactions on Network and Service Management, vol. 17, no. 3, pp. 1758-1773, Sept. 2020, doi: 10.1109/TNSM.2020.2988994.
b) Wang, Q., Dai, H. N., Zheng, Z., Imran, M., & Vasilakos, A. V. (2017). On connectivity of wireless sensor networks with directional antennas. Sensors, 17(1), 134.
c) M. K. Shukla, H. H. Nguyen and O. J. Pandey, "Multiuser Full-Duplex IoT Networks With Wireless-Powered Relaying: Performance Analysis and Energy Efficiency Optimization," in IEEE Transactions on Green Communications and Networking, vol. 4, no. 4, pp. 982-997, Dec. 2020, doi: 10.1109/TGCN.2020.3008409.
Overall the authors have done significant work, however, a major revision is required in this work and the authors are suggested to incorporate the necessary changes.
Author Response
In this work the authors are designing antennas towards efficient and sustainable point to pint wireless communication. The designing is useful for energy transfer between pair of devices. In this work, the authors are considering an extension of the electrodynamics equations, where exact solitonic type solutions are admitted. The results obtained indicate the significance of the proposed method. The authors have done significant work, however, the reviewer hasfew major concerns which must be addressed before the paper is accepted for publications.
The major concerns are listed below:
1- A separate sections for motivation and contributions must be provided for better understanding of the work.
Response: separate sections for motivation and contributions were given in the text, right after the introduction.
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2- Extended formulation for electrodynamics must be explained in the form of text to improve the quality of the paper.
Response: we have carefully read the description of electrodynamics extended model (now it appears under chapter 4). It all looks detailed and clear in the current text explanation. Unless we receive from Referee #3 more specific comments to address, we would leave it as it appears.
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3- The quality of Figure 2 must be improved.
Response: figure 2 was duly improved.
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4- With respect to directional beamforming of signals and wireless power transfer, few papers must be cited in this work, which will enhance the understanding of beaming of the signals and wireless power transfer process. The authors are suggested to cite the below papers:
- a) O. J. Pandey, V. Gautam, H. H. Nguyen, M. K. Shukla and R. M. Hegde, "Fault-Resilient Distributed
Detection and Estimation Over a SW-WSN Using LCMV Beamforming," in IEEE Transactions on Network and
Service Management, vol. 17, no. 3, pp. 1758-1773, Sept. 2020, doi: 10.1109/TNSM.2020.2988994.
- b) Wang, Q., Dai, H. N., Zheng, Z., Imran, M., & Vasilakos, A. V. (2017). On connectivity of wireless
sensor networks with directional antennas. Sensors, 17(1), 134.
- c) M. K. Shukla, H. H. Nguyen and O. J. Pandey, "Multiuser Full-Duplex IoT Networks With Wireless-Powered
Relaying: Performance Analysis and Energy Efficiency Optimization," in IEEE Transactions on Green
Communications and Networking, vol. 4, no. 4, pp. 982-997, Dec. 2020, doi: 10.1109/TGCN.2020.3008409.
Response: useful references appointed by Referee #3 have been commented and added to the text.
Round 2
Reviewer 3 Report
The authors have incorporated all the suggestions made by the reviewer. Subsequently, the quality of the revised manuscript has now been improved. The paper can be accepted for the publications in this journal.
