диафрагмированные волноводные фильтры / 201eab41-7127-4480-b776-d7a9624de251

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		Manuscript
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Accepted
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Accepted	Manuscript

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AUTHOR’S REPLY

REVIEWER: 1

Query1:Pls Improve Eq .1.

Reply from Author: The equationManuscript1 has been improved.

Query2: How did you find the values of L and C in Fig.1 C.

Reply from Author: The LC values can be found from the measured S- parameters. From the measured S – parameters, ABCD parameters can be found using [25]. From The obtained ABCD parameters at f0 the LC values can be found using equation (2) and (3). It may be noted that L and C are not independent, rather related by equation (1).

AcceptedQuery3: Fig.2 legends are not clear.

Reply from Author: The legend has been modified.

Query4:Is Fig.3 obtained using HFSS. Pls indicate that in the figure title.

Reply from Author: Indicated as per reviewer suggestions.(Marked in red)

Query5:The labels are not clear in Fig. 6a and Fig.11.

Reply from Author: The figure levels have been modified.

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Query6: Why does the slot arrangement in Fig14a look different from

Fig.6a?

Reply from Author: Author would like to thanks for pointing out the mistake. Figure 14 (a) has been corrected.

Reply from Author: Corrected.(Marked in red)

Query7: Please correct: During measurementManuscriptresonators has been.

Query8:Please correct: The comparison the simulated and measured frequency responsesare shown in Figure 18

Reply from Author: Corrected.(Marked in red)

Query9: What are the advantages of the proposed filter over other filters

Acceptedin Table III in terms of RL, IL, transition between stop band and passband?

Reply from Author: Table III reveals that the proposed filter has higher bandwidth than [1, 22, 23], better return loss than [1, 3, 4], better insertion loss than [22] and compact than [3]. Though some of the properties of the filters presented in [1–4] are better than the proposed filter, they do not have TZs at their stopband. Therefore the passband to stopband transition of the proposed filter is better than those in [1–4]. Some properties of the filters presented in [22, 23] are also better than the proposed filter, but their bandwidths are smaller than the proposed filter. At this point it may be noted that the proposed filter allows

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independent control of center frequency and TZs, which the other filters

do not.

REVIEWER: 2

Query1:The use of slot resonatorsManuscriptto design bandpass filters has

been presented in several papers as you cited e.g Ref 1- 10. The idea of generating multiple TZs in the stopband using multiple slots has been discussed in the literature e.g Ref 18, 22 and ref 23. How do you justify the novelty of your work?

Reply from Author: The proposed filter involves a very simple resonator structure that allows independent control of the passband

Acceptedcenter frequency and TZs. None of the filters, referred [1-10, 18, 22, 23], has this characteristics.In some of the referred filters there is no TZ at

all, which result in poor passband to stopband transition. Further the referred filters involves much complex resonator geometry than the proposed filter. They require lots of geometrical parameters to be optimized to place the center frequency and TZs at the preferred positions. In the proposed work we need to adjust only the length and width of the corresponding slots, which is much easier.

Query 2: Page 4 Line 52; What is the unloaded Q-factor of the

resonator?

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Reply from Author: The unloaded quality factor is 295.50. (Marked in

red)

Query 3: Page 8 Line 35; What is the unloaded Q-factor of the

resonator with multiple slots?
Manuscript
Reply from Author: The unloaded quality factor is 310.67.	(Marked in

red)

Query 4:Page 15 Line 13; What is the physical tolerance in the placement of resonator inside the waveguide. How do you make sure that there is no any air gap between waveguide walls and the resonator exterior boundary?

Reply from Author:The parametric analysis of |S11| of the filter with

Acceptedthe placement of resonator inside the waveguide (or “l”) has been included in the revised manuscript as Fig. 15. To make sure that there

is no gap between waveguide walls and resonator exterior boundary, the exterior boundary of the resonators were kept slightly larger than the internal boundary of the waveguide during fabrication. After that sand paper was used to rub the exterior boundary of the resonator to tightly fit it within waveguide.The simulated and measured results are in good agreement which reveals that there is air gap between the waveguide walls and the resonator exterior boundary.

Query 5:Page 15 Line 13;What causes insertion loss of 1 dB.

Reply from Author: The insertion loss of 1dB due to

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a.Losses in the parasitic and metals of the soldering contact.

b.Dielectric losses in the substrate.

c.Conductor losses in the waveguide.

d.Losses in the connector.

Query 6:Page 16 Figure 18; Please add detailed passband graph to

better view the passband insertion loss. Also, what is the cause of the peak at around 12.5 GHz,Manuscriptplease zoom in to view the peak

level. Although, there are three TZs in the upper side of the passband but the overall rejection level is low (around 10 dB). Reply from Author: Magnified view of the passband insertion loss has been incorporated in the revised manuscript as Fig. 19 (b). It may be noted from Fig. 19 (a) that the last two TZs are located at 11.62 and 13.15 GHz with a separation of 1.53 GHz. The large separation between them has resulted in the peak around 12.5 GHz. The peak can be

Acceptedreduced by downshifting the position of last TZ (i.e., TZ at 13.15)in frequency scale by adjusting the corresponding slot length.

Query7:Page 16 Table III; In what aspects proposed filter is better than presented in Ref 22 and 23.

Reply from Author: The bandwidth of the proposed filter is much larger than the bandwidth of the filters presented in [22] and [23]. The proposed filter also has better insertion loss than the filter presented in [22]. In addition it may be noted that the proposed filter allows independent control of center frequency and TZs, which the filters in [22] and [23] do not. Further the filters in [22] and [23] involvesmuch

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more complex resonatorstructure than the resonator structure

proposed by us.

Query 8: Page 17 Table IV; Why measured IL is more than double as compared to simulated IL. What conductivity value has been used

in simulation?	Manuscript

Reply from Author:The measured IL is more due to additional losses in the soldering metal and soldering parasitic, which were not considered in the simulation.The connectors used for measurement also involves some loss that was neglected during simulation. Further, during simulation copper was considered (conductivity 58000000 Siemens/meter) as the waveguide material whereas during fabrication aluminum was used as waveguide material to minimize fabrication cost.

AcceptedSince aluminum has higher resistance than copper, it also introduced some additional losses.

Query 9: Is there any tuning mechanism to correct postmanufacturing discrepancies.

Reply from Author: No post-manufacturing tuning mechanism has been proposed.