A Novel IC-Stripline Cell Design Based on Image Theory
Round 1
Reviewer 1 Report
1. the major concern is regarding the variations in the design of different cells. there should be more variants of dimensions, as the dimensions play an important role as well. Provide the EM field simulation results (electric filed and magnetic field) for all the designs used or will be added including the dimensional variations.
2. Please check the format for references.
3. It is suggested to study the magnetic field as well for the studies related to IC. The simulation result for magnetic field will add more depth and technicality to the study.
Author Response
Response to Reviewer 1 Comments
Point 1: The major concern is regarding the variations in the design of different cells. there should be more variants of dimensions, as the dimensions play an important role as well. Provide the EM field simulation results (electric filed and magnetic field) for all the designs used or will be added including the dimensional variations.
Response 1: Thank you for your advice. For IC-Stripline cells, dimensions indeed play an important role. In the revised manuscript, we introduced the influence of dimensions on the cell and added two different sizes and simulation results in Tab. 1 and Fig. 2. In addition, the magnetic field distribution is added to the simulation results of the field distribution of all cells, which are located in Fig. 5, Fig. 7, Fig. 13, and Fig. 16. We hope you find our revisions satisfactory.
Point 2: Please check the format for references.
Response 2: Thank you for your advice. We have carefully examined the format of the references and made some modifications.
Point 3: It is suggested to study the magnetic field as well for the studies related to IC. The simulation result for magnetic field will add more depth and technicality to the study.
Response 3: Thank you for your advice. We added the magnetic field distribution in Fig. 5, Fig. 7, Fig. 13, and Fig. 16. It can be seen from the simulation results that the fluctuation range of the magnetic field intensity is small, so we do not further analyze the influence of the magnetic field on the uniform field distribution. In future work, we will continue to pay attention to the influence of magnetic field changes on the measurement results. We hope you find our revisions satisfactory. Thank you.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Dear Authors, the paper you submitted is really interesting. However I have some comments:
1. The stripline you propose exploites the image theory to double the area of the radiated field. However, the field on the simmetry plane can be approximated as null. So, if an IC is larger than 3x3cm and it
is placed under the stripline, it is not subject to an uniform field intensity. Please comment on that.
2. A measurement of the field intensity at different positions on the width axis would be interesting to prove the effectiveness of the cell.
3. In the paper it is mentioned that the scaled down version has a banwidth of 12 GHz. However the measurements reported in Fig. 17 show a lower bandwidth. Please comment on that. Furthermore, why the measurements are so noisy?
4. In the VSWR graphs, a line which higligths the limit of 1.25 would be useful.
5. A 3D view of the CST simulated models would be useful.
6. A language revision of the paper is higly recommended.
Author Response
Response to Reviewer 2 Comments
Point 1: The stripline you propose exploites the image theory to double the area of the radiated field. However, the field on the simmetry plane can be approximated as null. So, if an IC is larger than 3x3cm and it is placed under the stripline, it is not subject to an uniform field intensity. Please comment on that.
Response 1: Thank you for your comment. At the end of the manuscript, it is mentioned that in future work, we will improve the measurement method to adapt to the characteristic that the field in the symmetry plane of the cell is null. For the improvement of the measurement method, our idea is to make two PCBs when the chip under test is larger than 3x3cm. Individually design the chip under test to the proper position on the two PCB boards. During the measurement, fix the two PCB boards on the top and bottom of the cell. By reasonably designing the chip positions on the two PCB boards, half of the chip is located in the uniform field area above the septum on one side and the other half is located in the uniform field area below the septum. When measuring radiation emission, the septum on one side can simultaneously receive electromagnetic waves radiated by two halves of the chip (half from the top and half from the bottom). When measuring the immunity, the electromagnetic wave radiated from the septum on one side can act on both halves of the chip at the same time. Due to the limitation of the length of the manuscript, we did not add this part. In future work, we will compare and analyze the feasibility of this method. We hope you find our revisions satisfactory. Thank you.
Point 2: A measurement of the field intensity at different positions on the width axis would be interesting to prove the effectiveness of the cell.
Response 2: Thank you for your advice. We are sorry that we can not provide the measurement result of the field intensity at different positions on the width axis. Because the inner space of the cell is small and complete shielding during operation, there is no effective measuring equipment to measure the field distribution in the cell, so we can only provide simulation results.
Point 3: In the paper it is mentioned that the scaled-down version has a banwidth of 12 GHz. However the measurements reported in Fig. 17 show a lower bandwidth. Please comment on that. Furthermore, why the measurements are so noisy?.
Response 3: Thank you for your advice. In the revised manuscript, Fig. 17 is moved to Fig. 19. It can be seen from Fig. 19 that the VSWR is less than 1.25 at 0-10.5 GHz and less than 1.5 at 10.5 GHz-12 GHz. Relevant international standards stipulate that the VSWR is less than 1.25 within 0-3 GHz, and there is no specific requirement above 3 GHz. It is generally accepted that VSWR can be lower than 1.5 at a higher frequency. For example, the VSWR of the IC-Stripline cell EM601-6 produced by ESD-EMC mentioned in the paper is less than 1.5 at 3-6 GHz. Therefore, we believe that the measurement results in Fig. 19 show that the bandwidth of the cell is not less than 12 GHz. In addition, we analyze that the "noise" in the measurement results is caused by phase error. Since the image theory requires the phase difference of two electromagnetic waves to be 180 degrees, the actual measurement cannot strictly guarantee that the phase difference of each frequency point is 180 degrees, and there will be a certain phase error. Therefore, there are many "noises" in the measurement results.
Point 4: In the VSWR graphs, a line which higligths the limit of 1.25 would be useful.
Response 4: Thank you for your advice. We have added a reference line in all the measurement results with VSWR. Such as Fig.2, Fig.3, Fig.6, Fig.9, Fig.12, Fig.15, Fig.17, Fig.19.
Point 5: A 3D view of the CST simulated models would be useful.
Response 5: Thank you for your advice. We have added 3D models established in CST. Such as Fig.4, Fig.6, and Fig.11.
Point 6: A language revision of the paper is higly recommended.
Response 6: Thank you for your advice. We have revised some sentences that are not smooth and corrected the wrong usage of some words. I hope the modified manuscript can satisfy you.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Please analyze the magnetic field as well, just adding the images will not add to the importance and the effect seen. Explanation to be added in the text for magnetic filed simulation results, can include the reason and analyses for the changes observed.
Author Response
Response to Reviewer 1 Comments
Point 1: Please analyze the magnetic field as well, just adding the images will not add to the importance and the effect seen. Explanation to be added in the text for magnetic filed simulation results, can include the reason and analyses for the changes observed.
Response 1: Thank you for your advice. In the revised manuscript, we added descriptions of the magnetic field distribution as follows:
149-151: “In Fig. 5(b), the magnetic field distribution at the top area of the cell is parallel to the septum, and the change of the magnetic field intensity is less than 1.67 A/m, which does not affect the distribution of the uniform field.”
198-202: “Compared with Fig. 5(b), the magnetic field in Fig. 7(b) exhibits a plurality of periods along the propagation direction. The period width depends on the frequency of the electromagnetic wave. The magnetic field distribution at the top of the cell is parallel to the septum, and the change of the magnetic field intensity is less than 1.65 A/m, which does not affect the distribution of the uniform field.”
273-275: “Compared with Fig. 7 (b), the magnetic field in Fig. 13(b) extends laterally for one period. This proves that the field distribution of the cell does not change in a single period after using the image theory.”
312-316: “The maximum magnetic field intensity in Fig. 16(b) is increased to 3.5 A/m as compared with Fig. 13(b). This is because the distance between the septum and the outer conductor is closer after the cell size is reduced. In the case of the same input power, the magnetic field strength of the scaled-down cell is stronger.”
We hope you find our revisions satisfactory.
Reviewer 2 Report
Thank you for the revision of the paper. Now it satisfies all the requirements to be published.
Author Response
Thank you for your affirmation of our work!
