WM524 WIFI Module RF Exposure Info RF Exposure Report Shenzhen KeZhongLong Optoelectronic Technology Co., Ltd.

Shenzhen KeZhongLong Optoelectronic Technology Co., Ltd. WIFI Module

FCC ID Filing: 2AF2K-WM524
Purchase on Amazon: WIFI Module

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RF Exposure Report
FCC-ID: 2AF2K-WM524
RF Exposure Measurement
The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The
gain of the antennas used in the product is extracted from the Antenna data sheets provided
and also the maximum total power input to the antenna is measured. Through the Friis
transmission formula and the maximum gain of the antenna, we can calculate the distance,
away from the product, where the limit of MPE is reached.
Although the Friis Transmission formula is far field assumption, the calculated result of that is
an over-prediction for near field power density. It is taken as worst case to specify the safety
range.
RF Exposure Limit
According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the
environmental impact of the human exposure to radio-frequency (RF) radiation as specified in
1.1307 (b)
Frequency Range
Electric Field
Magnetic Field
Power Density
(MHz)
Strength (V/m)
Strength (A/m)
(mW/cm²)
Limits for Occupational / controlled Exposures
300 - 1500
--
--
F/300
1500 – 100000
--
--
5.0
Limits for General population / Uncontrolled Exposure
300 - 1500
--
--
F/1500
1500 – 100000
--
--
1.0
Limits for Maximum Permissible Exposure (MPE)
F= Frequency in MHz
Friss Formula
Friss Transmission Formula: Pd = (Pout * G) / (4*pi*r²)
Where
Pd = power density in mW/cm²
Pout = output power to antenna in mW
G = gain of antenna in linear scale
Pi = 3.1416
R = Distance between observation point and the center of radiator in cm
If we know the maximum gain of the antenna and the total output power to the antenna,
through calculation, we will know MPE value at distance 20cm.
EUT Operation condition
EUT was enabled to transmit and receive at lowest, middle and highest channels.
Classification
The antenna of this product, under normal use condition, is at least 20cm away from the body of the
user. Warning statement to the user for keeping at least 20cm or more separation distance from the
antenna should be included in the User manual. So, this device is classified as Mobile device.
2.4G WIFI
Mode
802.11b/g/n20:
2412-2462MHz
802.11n40:
2422-2452MHz
Detector
PEAK
802.11b
17±1dBm
802.11g
16±1dBm
802.11n20
18±1dBm
802.11n40
19+1dBm
ANT Gain (G)
Antenna number: 2*Dipole
Antenna A gain : 1dBi
Antenna B gain : 1dBi
MIMO technology Directional gain= 4.01dBi
(gain of antenna in linear scale=2.518)
Channel
Protocol
Output
Output
Power
Power to
ANT Gain(gain of
Frequenc
Power to
Limit
Density
Antenna
antenna in
Antenna
(mW/cm²)
(mW/cm²)
(dBm)
linear scale)
(MHz)
(mW)
802.11 b
802.11 g
802.11 n20
802.11 n40
2.518
2.518
2.518
2.518
18
17
19
20
2412
2412
2462
2452
63.0957
50.1187
79.4328
########
0.03162
0.02512
0.03981
0.05012
5G WIFI
ANT Gain (G)
Mode
IEEE 802.11a/ n/ac(HT20)
5.180GHz-5.240GHz
IEEE 802.11n/ac(HT40)
5.190GHz-5.230GHz
IEEE 802.11ac(HT80) 5.210GHz
Detector
802.11
a/n/ac(HT20)
802.11
n/ac(HT40)
802.11
ac(HT80)
PEAK
11±1dBm
10±1dBm
7±1dBm
Antenna number: 2*Dipole
Antenna A gain : 1dBi
Antenna B gain : 1dBi
MIMO technology Directional gain= 4.01dBi
(gain of antenna in linear scale=2.518)
Protocol
802.11
a/n/ac(HT20)
802.11
n/ac(HT40)
802.11 ac(HT80)
Output
ANT
Channel Power to
Gain(gain of
Frequency Antenna
antenna in
(MHz)
(dBm)
linear
scale)
2.518
5180
12
Output
Power to
Antenna
(mW)
Power
Limit
Density
(mW/cm²)
(mW/cm²)
15.8489
0.09999
2.518
5190
11
12.5893
0.00631
2.518
5210
6.3096
0.00316
5G WIFI
ANT Gain (G)
Mode
IEEE 802.11a/
n/ac(HT20)5.260GHz-5.320GHz
IEEE 802.11a/
n/ac(HT40)5.270GHz-5.310GHz
IEEE 802.11ac(HT80) 5.290GHz
Detector
PEAK
802.11
10.5±1dBm
a/n/ac(HT20)
802.11
9±1dBm
n/ac(HT40)
802.11
6±1dBm
ac(HT80)
Antenna number: 2*Dipole
Antenna A gain : 1dBi
Antenna B gain : 1dBi
MIMO technology Directional gain= 4.01dBi
(gain of antenna in linear scale=2.518)
Protocol
Channel
Output
Output
2.518
5260
11.5
14.1254
0.03162
2.518
5270
10
10.0000
0.00501
2.518
5290
5.0119
0.00251
Power
ANT Gain(gain
Frequenc Power to Power to
Limit
Density
of antenna in
Antenna Antenna
(mW/cm²)
(mW/cm²)
linear scale) (MHz)
(dBm)
(mW)
802.11
a/n/ac(HT20)
802.11
n/ac(HT40)
802.11
ac(HT80)
5G WIFI
ANT Gain (G)
Mode
IEEE 802.11a/
n/ac(HT20)5.500GHz-5.700G
Hz
IEEE 802.11a/
n/ac(HT40)5.510GHz-5.670G
Hz
IEEE 802.11ac(HT80)
5.530-5.610GHz
Detector
802.11
a/n/ac(HT20)
PEAK
10.5±1dBm
802.11 n/ac(HT40)
10±1dBm
802.11 ac(HT80)
5±1dBm
Antenna number: 2*Dipole
Antenna A gain : 1dBi
Antenna B gain : 1dBi
MIMO technology Directional gain= 4.01dBi
(gain of antenna in linear scale=2.518)
Protocol
Channel
Output
Output
2.518
5500
11.5
14.1254
0.03162
2.518
5510
11
12.5893
0.00631
2.518
5530
3.9811
0.00200
Power
ANT Gain(gain
Frequenc Power to Power to
Limit
Density
of antenna in
Antenna Antenna
(mW/cm²)
(mW/cm²)
linear scale) (MHz)
(dBm)
(mW)
802.11
a/n/ac(HT20)
802.11
n/ac(HT40)
802.11
ac(HT80)
5G WIFI
ANT Gain (G)
Mode
IEEE 802.11a/
n/ac(HT20)5.745GHz-5.825G
Hz
IEEE 802.11a/
n/ac(HT40)5.755GHz-5.795G
Hz
IEEE 802.11ac(HT80)
5.775GHz
Detector
802.11
a/n/ac(HT20)
PEAK
10±1dBm
802.11 n/ac(HT40)
9.5±1dBm
802.11 ac(HT80)
7±1dBm
Antenna number: 2*Dipole
Antenna A gain : 1dBi
Antenna B gain : 1dBi
MIMO technology Directional gain= 4.01dBi
(gain of antenna in linear scale=2.518)
Protocol
802.11
a/n/ac(HT20)
802.11
n/ac(HT40)
802.11 ac(HT80)
Output
ANT
Channel Power to
Gain(gain of
Frequency Antenna
antenna in
(MHz)
(dBm)
linear
scale)
2.518
5745
11
Output
Power to
Antenna
(mW)
Power
Limit
Density
(mW/cm²)
(mW/cm²)
12.5893
0.03162
2.518
5755
10.5
11.2202
0.00562
2.518
5775
6.3096
0.00316
Download: WM524 WIFI Module RF Exposure Info RF Exposure Report Shenzhen KeZhongLong Optoelectronic Technology Co., Ltd.
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Document ID3556369
Application IDtCcsXFLqzqRGiz0Qk+Xo2A==
Document DescriptionRF Exposure Report
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize20.26kB (253210 bits)
Date Submitted2017-09-12 00:00:00
Date Available2017-09-12 00:00:00
Creation Date2017-09-01 05:37:46
Producing SoftwareMicrosoft® Office Word 2007
Document Lastmod2017-09-01 05:37:46
Document TitleRF Exposure Report
Document CreatorMicrosoft® Office Word 2007
Document Author: bovey

Source Exif Data:
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 6
Language                        : zh-CN
Tagged PDF                      : Yes
Author                          : bovey
Creator                         : Microsoft® Office Word 2007
Create Date                     : 2017:09:01 05:37:46
Modify Date                     : 2017:09:01 05:37:46
Producer                        : Microsoft® Office Word 2007

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