Inverted F Type Antenna Design for the Cattle Activity and Estrus Detection Sensor Module
Round 1
Reviewer 1 Report
See attached, minor comments for clarification.
Comments for author File: 
Comments.pdf
Author Response
please see the attached pdf
lene#
18: changed to compared
59-60: to clear sentence is changed to: The gyro sensor on mainboard detects the movement of livestock, and the mainboard transmits the movement data to the base station through the ZigBee RF transmission & reception module with monopole or high gain patch antenna based on the size of the ranch.
61 added => The ZigBee HbeePro-20C RF module
The ZigBee HbeePro-20C RF module, for short-range like 1m
62 long-distance can be based on the ranch size.
It can be extended by the higher gain of the receiving antenna.
66.-69 Since there is only position data it is not a big amount of data. It is changed as following
The low 8kb/sec data can be analyzed and displayed by mobile or computer, and the result can be informed in advance to the owner. A daily or weekly data collected continuously and analysis of the data makes it possible to predict the future and various outcomes such as health status, breeding period, and activity status of cattle.
78 I added Figure without the chip antenna. I will clear the uncertainty.
80 unit is in mm PDF transform prob. It is OK with my PDF
81 changed to Figure 2. RF module, location of antenna, size of feeding point of inverted F antenna
82 Yes, that’s why I add figure 3. L and H are general parameters and frequency dependent. The explanation is in Line 89~90
90 PDF transform prob. In MDPI l is OK with my PDF
- since IFA is in the air so length in mm.
99 Fig4 is changed to clear the shape of the antenna. I added an explanation about Fig3 and Fig4 near line 94 as follows: L in Figure 2 equals L1+L2 in Figs 4 and 5.
L1 and L2 are added to Fig 4
107-108 The antenna location was displayed on the coverside.
The Antenna shape on the cover is deleted to make it clear in Fig 4.
112 gab => gap
- W-> w
118 length of L2 varies LY I deleted to match with Fig 6.
119-120 changed as bellow.
The optimum of L2 is 8mm when L1=20mm and h=5.5mm. The optimized total length of the proposed IFA antenna L1+L2+h is about 33.5mm, which is about 3mm longer than the theoretical length of IFA antenna about 31mm, which is l/4 of ZigBee frequency of 2.45GHz.
122 PDF transform prob. In MDPI l is OK with my PDF
123 Fig 5 changed to gap
128 add an explanation of board on line# 113 on FR4 board
and of polypropylene cover on 104
131-132 Figure6 Legend changed to L2
Matched to Return loss
134 label of x-axis is changed matched to the text
137 Fig 8 (b) is changed. The scale is shown at the bottom. The reason why the measurement window is shown is to show the actual measurements. If you want to change/merge to figure 7, it can be done at the final version
151 X, Y, Z axes are added to Fig 5.
153
Fig.9 is changed as (antenna is added in the pattern) Scale is auto I cannot change.
I added on line 142: and radiation patterns of x-z and x-z planes are shown in Fig. 9(b) and (c) with antenna structure.
Reviewer 2 Report
It is advisable to consider the impact of the lossy material with high permittivity on the antenna radiation properties (return loss, resonant frequency and gain …) when the wireless equipment is mounted close to that material?
15 A space should be inserted between the numerical value and its corresponding unit of measurement, throughout the text (for example 2.45GHz --> 2.45 GHz; 1.6dB --> 1.6 dB
17, 184, 194 …20dBm…--> …20 dB… (dB is a relative unit of measure)
89 …position, and It does not require… (“It” should be replaced with “it”)
90 Note that symbol “lambda” (λ) is not correctly reproduced.
112 and 115 What do you mean with the word (variable) “gab”? Do you mean “gap”?
122 Note that symbol “lambda” (λ) is not correctly reproduced.
151-152 What is the meaning of the coordinate system in Fig. 9 (a) on the right? Can you connect it with the coordinate system in Fig (a) on the left?
177 Could you clarify the caption: …Fabricated & measurement of |S11…?
199 In REF 1, the author’s name is erroneously given as “Baanis “ --> “Balanis”
The list of references on the antenna design is not adequate.
Author Response
It is advisable to consider the impact of the lossy material with high permittivity on the antenna radiation properties (return loss, resonant frequency, and gain …) when the wireless equipment is mounted close to that material?
=> CST simulation has been done including the board and material near the antenna. The resonant frequency with and without cover has been analyzed.In Line #113, information of material (FR4) is added, and in line #105, the information of polypropylene cover is added.
15 A space should be inserted between the numerical value and its corresponding unit of measurement, throughout the text (for example 2.45GHz --> 2.45 GHz; 1.6dB --> 1.6 dB
Corrected
- -16 dB and the gain of 1.6 dB at 2.45 GHz.
- All other units in the article are corrected.
17, 184, 194 …20dBm…--> …20 dB… (dB is a relative unit of measure)
Corrected
- 17 There is about 20dB enhancement
- 184 There is 20 dB enhancement with the proposed IFA antenna.
- 194 20 dB RSI can be enhanced
…position, and It does not require… (“It” should be replaced with “it”)
- Changed as following:
- position, and it does not require any
- Note that symbol “lambda” (λ) is not correctly reproduced.
- MDPI publishing company made mistake in PDF transform prob. l is OK with my PDF
112 and 115 What do you mean with the word (variable) “gab”? Do you mean “gap”?
- Changed as following:
- 20< L1<25 mm, L2< 30 mm, 3<h< 5.5 mm, w=3 mm, the gap, between feeding and ground, is about 2~4.4 mm on FR4 board. The width of the antenna w is not as sensitive as other parameters. The optimization of each parameter value to match the antenna to the frequency of the ZigBee 45 GHz, and the parameters are adjusted within the limitations of all parameters. The simulated and optimized parameters of the antenna are: L1 = 20, L2=5, height h=5.5 mm, and gab=4 mm.
- Figure 5 is changed gab => gap
122 Note that symbol “lambda” (λ) is not correctly reproduced.
- MDPI publishing company made mistake in PDF transform prob. l is OK with my PDF
151-152 What is the meaning of the coordinate system in Fig. 9 (a) on the right? Can you connect it with the coordinate system in Fig (a) on the left?
- 9s are changed with X, Y, Z coordinate, and the antenna is added in 9(b) and (c) patterns. I added on line 142: and radiation patterns of x-z and x-z planes are shown in Fig. 9(b) and (c) with antenna structure.
177 Could you clarify the caption: …Fabricated & measurement of |S11…?
- Captions of Figure 7, 8 are changed to S11 [dB]
199 In REF 1, the author’s name is erroneously given as “Baanis “ --> “Balanis”
- Changed
The list of references on the antenna design is not adequate.
- 11 and 6 are added and MDPI may require MDPI journals in the reference. The other reviewer likes Figure 3, I added ref. 11. All Ref numbers are corrected.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
The author thoroughly revised his manuscript in accordance to the reviewer’s comments and concerns. The proposed design still suffers from a lack of novelty.
The revised version of the manuscript is acceptable for publishing in Applied Sciences.
