5WFC Wireless charger RF Exposure Info RF Exposure Report Shenzhen MHLL Technology Co., Limited

Shenzhen MHLL Technology Co., Limited Wireless charger

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RF Exposure Considerations
1. Measuring Standard
KDB 680106 D01 RF Exposure Wireless Charging Apps v02
2. Requirements
According to the item 5.2 of KDB 680106 D01v02:
Inductive wireless power transfer applications that meet all of the following requirements are excluded from
submitting an RF exposure evaluation.
a) Power transfer frequency is less that 1 MHz
b) Output power from each primary coil is less than 5 watts
c) The transfer system includes only single primary and secondary coils. This includes charging systems that may
have multiple primary coils and clients that are able to detect and allow coupling only between individual pairs of
coils
d) Client device is inserted in or placed directly in contact with the transmitter
e) The maximum coupling surface area of the transmit (charging) device is between 60 cm2 and 400 cm2
f) Aggregate leakage fields at 10 cm surrounding the device from all simultaneous transmitting coils are
demonstrated to be less than 30% of the MPE limit.
Limits For Maximum Permissible Exposure (MPE)
3. Test Setup
Note: Measurements should be made from all sides and the top of the primary/client pair, with the 10cm measured
from the center of the probe(s) to the edge of the device.
4.Test Procedure
1) The RF exposure test was performed in anechoic chamber.
2) The measurement probe was placed at test distance (10cm) which is between the edge of the charger and the
geometric center of probe.
3) The highest emission level was recorded and compared with limit as soon as measurement of each
points (A, B, C, D, E) were completed.
4) The EUT was measured according to the dictates of KDB 680106 D01 v02.
Remark;
The EUT’s test position A, B, C, D and E is valid for the E and H field measurements.
5. Test Equipment List
Equipment
Manufacturer
Model No.
Calibration Due
Magnetic field meter
NARDA
ELT-400
Sep. 27, 2018
6. Test Result
E-Filed Strength at 10 cm from the edges surrounding the EUT (V/m)
Frequency
Range
(KHz)
110~ 205
Test
Position A
1.41
Test
Position B
1.42
Test
Position C
1.19
Test
Position D
1.26
Test
Position E
1.34
Limits Test
(V/m)
614
H-Filed Strength at 10 cm from the edges surrounding the EUT (A/m)
Frequency
Range
(KHz)
110~ 205
Test
Position A
0.16
7. Test Set-up Photo
Test
Position B
0.15
Test
Position C
0.14
Test
Position D
0.11
Test
Position E
0.12
Limits
Test
(A/m)
1.63
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Document ID3712534
Application IDvrp8YLvUqJFW43Eyu3jCwQ==
Document DescriptionRF Exposure Report
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize21.38kB (267203 bits)
Date Submitted2018-01-12 00:00:00
Date Available2018-01-12 00:00:00
Creation Date2018-01-11 17:42:18
Producing SoftwareAcrobat Distiller 7.0 (Windows)
Document Lastmod2018-01-11 17:42:18
Document TitleRF Exposure Report
Document CreatorPScript5.dll Version 5.2
Document Author: Administrator

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