ST60 millimeter wave water medium data transmission test report

mars4zhu

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ST60 millimeter wave water medium data transmission test report

Document Number	TR_ST60_0001
Keywords	ST60 , 60GHz , water medium data transmission, water medium communication
summary	This test report records the test of ST60 's 60GHz high-speed data communication for water medium data transmission, by comparing the data transmission and speed of different media separated by communication modules, including air, pure water, sodium chloride solutions of different concentrations (saturated concentration 26.4% , 1/8 saturated concentration, 3.5 ‰ concentration of seawater and other salinity ), and sediment mixtures of different concentrations. The results show that ST60 can only penetrate the water medium and achieve data transmission when the two communication module shells are pressed tightly together, the gap is very small, and the thickness of the water layer in the middle (including pure water, saturated sodium chloride solution, 3.5 ‰ sodium chloride solution with salinity equal to seawater , and mud-sand mixture) is extremely low.

Mars4zhu

2022-03-09

Table of contents

1 Background 1

2Test Purpose 1

3 ST60 millimeter wave learning and preliminary trial 1

3.1 Introduction to 60GHz millimeter wave 1

3.2 SK201E data collection and ST60 millimeter wave technology introduction 2

3.3 ST60 is used to test the speed of the computer and the public network 3

3.4 ST60 for peer-to-peer network speed test between computer and Raspberry Pi 4

4 ST60 mmWave Water Media Data Transmission Evaluation Test Step 4

5. Build a test device for evaluating data transmission in water medium. 5

6Test water equipment for different water qualities7

7 Evaluation Results Summary 8

7.1 Transmission medium: air 8

7.2 Transmission medium: pure water 9

7.3 Transmission medium: sodium chloride solution 10

7.3.1 Saturated sodium chloride solution 10

7.3.2 Sodium chloride solutions of different concentrations 11

7.4 Transmission medium: mud-water mixture 11

7.4.1 Saturated mud-water mixture 11

7.4.2 Mud-water mixtures of different concentrations 12

7.5 Test results summary table 13

8 Conclusion 13

9Revision History 14

Illustration Index

Figure 2 1 SK201E module ST60 high-speed communication function block diagram 1

Figure 3 1 Results of searching for “millimeter wave projection” on the Internet 2

Figure 3 2 Physical picture of SK201E module

Figure 3 3 Internet speed test of computer connected directly to the public network and connected through ST60

Figure 3 4 The speed test of the computer connected to the public network through ST60

Figure 3 Point-to-point network speed test between 5 computers and Raspberry Pi 4 via ST60

Figure 3 6 SK201E module ST60 high-speed communication function block diagram 4

Figure 5 1 Three sets of liquid container evaluation tools with different thicknesses 5

Figure 5 2 Three configurations of gap thickness between two glass plates ( 0.9mm , 0.45mm , ~0.1mm ) 6

Figure 6 1 Prepared sodium chloride solutions of different concentrations and their raw materials (salt, purified water) 7

Figure 6 2 The prepared mud-water mixture of different concentrations and its raw materials (mud, pure water) 8

Figure 7 1 Gap medium: air, spacing: 0.1~10mm , transmission speed is 950Mps 8

Figure 7 2 Data transmission rate changes after the position is shifted and then restored 9

Figure 7 3 Medium pure water, ID card placed on one or both sides of the glass plate, unable to connect, data transmission rate is 0 9

Figure 7 4 Medium: Pure water, ID card placed on glass plate, data transmission rate change 10

Figure 7 5 -medium sodium chloride solution, the data transmission rate change when the ID card is placed on the glass plate and the ID card is removed 10

Figure 7 6 Medium sodium chloride solution, data transmission rate change when a thicker layer of sodium chloride solution is placed on the glass plate 11

Figure 7 5 -medium mud-water mixture, ID card placed on glass plate, data transmission rate change when ID card is removed 12

Figure 7 5 medium mud-water mixture, glass plate sandwiched with a piece of paper towel, data transmission rate is 0 12

Table Index

Table 7.1 Summary of ST60 millimeter wave water medium data transmission test results (unit: Mbps ) 13

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Figure 7 8The medium is a mixture of mud and water, and a piece of paper towel is sandwiched between a glass plate. The data transmission rate is 0

1. 1. 2. Mud-water mixtures of different concentrations

The results are similar to those of the saturated mud-water mixture, so the test content and results will not be repeated.

1. 5. Test results summary table

Table 7 1Summary of ST60 millimeter wave water medium data transmission test results (unit: Mbps )

Media Type	Air	Purified water	Saturated sodium chloride solution ( 26.4% )	Sodium chloride solution with equal salinity to seawater ( 35 ‰)	Saturated mud-water mixture	Diluted mud-water mixture
Pitch 0.9mm (Bilateral ID card)	950	0	0	0	0	0
Pitch 0.45mm (Single ID card)	950	0	0	0	0	0
Pitch ~0.1mm (Close fit)	950	950	950	950	950	950
Pitch ~0.1mm (Loose fit)	950	0	0~950	0	0	0
Pitch ~0.1mm (tissue)	950	0	0	0	0	0

8. in conclusion

ST60 is used for data communication in fully enclosed waterproof equipment with water medium. It is necessary to use a compressed gap to ensure that the thickness of the water layer in the middle of the communication module is the lowest (at least less than 0.05mm ) to achieve data communication. If these measures cannot be taken, the data transmission of ST60 cannot establish a connection.

9. Revision History

Version Number	Release time	content
A0	2022-03-09	First time writing

mars4zhu

The forum layout has changed after uploading, please see the attachment for the layout pdf file.

ST60毫米波水介质数据传输测试报告.pdf (4.9 MB, downloads: 8)

2022-3-10 17:39 上传

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bobde163

The host tested it in detail and learned a lot.

wangerxian

This is a professional test! It looks very standard.