A Miniaturized Thin-Film UWB Monopole Antenna Implemented with High-Dk Adhesive
Round 1
Reviewer 1 Report
The novelty in this work is poor. this work is very near to the flexible antenna works and wearable antenna works.
The authors investigated the impact of adhesive material with a high dielectric constant (high-Dk) on the antenna performance and optimize its design for UWB operation.
The authors mentioned in the title of this paper UWB while the working frequency band is just from 6 to 9 GHz.
The bonding between the SMA connector and the line feeding is cover the step in the feeding line. So, there dome variation in results between simulation and measurement.
The type of VNA and the measurement setup figure is not mentioned while the author was interested more to explain the type of SMA connector.
The author mentioned that the proposed antenna is compact in dimension with a very thin thickness. The very thin thickness leads to low gain and narrow bandwidth.
Author Response
Dear Reviewer,
We would like to thank your comments. We tried our best to revise as you suggested.
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
In this paper, the authors presented an intyeresting technological solution for reducing the size of a UWB monopole antenna realized on a multilayer printed circuit board (PCB). Knowing that the area occupied by patch antennas is inversely proportional to the relative permittivity of the substrate, the authors propose the insertion of a dielectric material with high relative permittivity into the dielectric core of the PCB structure. The paper describes the configuration of the substrate on which the antenna was fabricated, the parametric layout optimization required to achieve the broadband matching, the fabrication, and the characterization of the designed antennas. The determination of the degree of dispersion associated with the transfer function for antennas coupled in three different configurations is noticed, due to its relevance for UWB communications based on complex modulations. The content of the paper is therefore appropriate to the topic developed.
Readers may find it useful to have additional information on:
· the name and manufacturer of the high permittivity adhesive material;
· a few physical properties of this material, such as thermal stability, and flexibility;
· typical thickness tolerances of the two dielectric materials, i.e. polyimide and adhesive layers, in the PCB structure.
Some corrections are also proposed in the text of the paper, as shown in the table below:
|
Row(s) |
Current text |
Suggested replacement |
|
49-50 |
with the scarification of bandwidth |
with bandwidth scaling |
|
142-144 |
Figure 6 shows the comparison between simulation and measurement results in terms of normalized radiation patterns in the H-plane, which is the XY-plane (θ = 90â—¦), and E-plane, which is the XZ-plane (Ï• = 0â—¦) of the designed antenna operating at the frequency of 6 GHz and 7.5 GHz. Apparently, the omnidirectional radiation pattern in the E-plane (XZ-plane) and the form of figure-eight shape in the H-plane (XY-plane) are provided. |
Figure 6 shows the comparison between simulation and measurement results of the designed antenna operating at 6 GHz and 7.5 GHz, in terms of normalized radiation patterns in the H-plane (or XY-plane) with θ = 90°, and E-plane (or XZ-plane) with Ï• = 0°. |
|
168-169 |
By plotting S21 both magnitude and phase, |
By plotting both magnitude and phase of S21, |
|
After 177, Eq. (1) |
FSSRC |
FSRRC |
|
197-198 |
Meanwhile, the fidelity factor equals 0 indicating that the two signals are completely different. |
On the other hand, the fidelity factor tending towards zero shows that the two signals are completely different. |
|
203-204 |
The UWB antenna; however, consists of numerous frequency components. |
The UWB signal, however, consists of numerous frequency components. |
|
222 |
a miniaturized antenna thin film antenna |
a miniaturized thin film antenna |
Author Response
Dear Reviewer,
We would like to thank your comments. We tried our best to revise as you suggested.
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
1) Provide more detail information about "new adhesive material".
2) How much did the use of adhesive material reduce the size of the antenna?
3) What is the reason for the difference in the shape of the radiation pattern in the XY plane in the experimental and simulation results?
4) An antenna on a flexible substrate is studied in this work, but no data on the mechanical properties of the antenna are presented.
Author Response
Dear Reviewer,
We would like to thank your comments. We tried our best to revise as you suggested.
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
In all cases, the authors respond correctly to the comments.
