WRTNODE7 MT7697module RF Exposure Info MPE Beijing wanglianzhiyuan Tech Inc

Beijing wanglianzhiyuan Tech Inc MT7697module

FCC ID Filing: 2ALR4-WRTNODE7
Purchase on Amazon: MT7697module

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FCC ID: 2ALR4-WRTNODE7
Maximum Permissible Exposure (MPE)
According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the
environment impact of human exposure to radio frequency(RF) Radiation as specified in
§1.1307(b)
Limits for Maximum Permissible Exposure (MPE)
MPE Calculation Method
E (V/m) =
30 * P * G
Power Density: Pd (W/m²) =
E2
377
E = Electric field (V/m)
P = Average RF output power (W)
G = EUT Antenna numeric gain (numeric)
d = Separation distance between radiator and human body (m)
The formula can be changed to
Pd =
30 * P * G
377 * D 2
From the EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the
gain of the used antenna, the RF power density can be obtained.
Measurement Result
WIFI:
Operation Frequency: WIFI 802.11b/g/n HT20: 2412-2462MHz,
802.11 HT40: 2422-2452MHz;
Power density limited: 1mW/ cm2
Antenna Type: Ceramic Antenna& FPCB Antenna;
R=20cm
mW=10^(dBm/10)
antenna gain Numeric=10^(dBi/10)= 10^(1/10)=1.12
Ceramic Antenna gain: 0.5dBi:
Channel
Freq.
modulation
(MHz)
2412
2437
802.11b
2462
2412
2437
802.11g
2462
2412
2437
802.11n
H20
2462
2422
2437
802.11n
H40
2452
conducted
power
Tune-up
power
(dBm)
(dBm)
12.13
11.79
13.23
Ceramic
Antenna
Max
tune-up power
Evaluation
result at 20cm
Power
density
Limits
Power
density(mW/cm (mW/cm2)
2)
Gain
(dBm)
(mW)
Numeric
12.5±1
13.5
22.38721
1.12
0.00499
12.5±1
13.5
22.38721
1.12
0.00499
12.5±1
13.5
22.38721
1.12
0.00499
6.78
7.18
9.13
7±1
6.309573
1.12
0.00141
7±1
6.309573
1.12
0.00141
8±1
7.943282
1.12
0.00177
6.23
8.68
8.42
7±1
6.309573
1.12
0.00141
8±1
7.943282
1.12
0.00177
8±1
7.943282
1.12
0.00177
6.23
8.68
8.42
7±1
6.309573
1.12
0.00141
8±1
7.943282
1.12
0.00177
8±1
7.943282
1.12
0.00177
FPCB
Antenna
Evaluation
result at 20cm
Power
density
Limits
FPCB Antenna gain: 4.5dBi:
Channel
Freq.
modulation
(MHz)
2412
2437
802.11b
2462
2412
2437
802.11g
2462
2412
2437
802.11n
H20
2462
2422
2437
802.11n
H40
2452
conducted
power
Tune-up
power
(dBm)
(dBm)
12.13
11.79
13.23
Max
tune-up power
Power
density(mW/cm (mW/cm2)
2)
Gain
(dBm)
(mW)
Numeric
12.5±1
13.5
22.38721
2.82
0.01256
12.5±1
13.5
22.38721
2.82
0.01256
12.5±1
13.5
22.38721
2.82
0.01256
6.78
7.18
9.13
7±1
6.309573
2.82
0.00354
7±1
6.309573
2.82
0.00354
8±1
7.943282
2.82
0.00446
6.23
8.68
8.42
7±1
6.309573
2.82
0.00354
8±1
7.943282
2.82
0.00446
8±1
7.943282
2.82
0.00446
6.23
8.68
8.42
7±1
6.309573
2.82
0.00354
8±1
7.943282
2.82
0.00446
8±1
7.943282
2.82
0.00446
BT:
Operation Frequency: BT3.0: 2402MHz~2480MHz
Power density limited: 1mW/ cm2
Antenna Type: Ceramic Antenna& FPCB Antenna;
R=20cm
Bluetooth DSS:
Ceramic Antenna gain: 0.5dBi:
Channel
Freq. (MHz)
conducted
power
modulation
(dBm)
2402
2441
GFSK
2480
2402
2441
π/4-DQPSK
2480
2402
2441
2480
8DPSK
3.15
4.63
4.82
2.66
4.13
4.3
4.5
4.68
Max
Tune-up
power (dBm)
Antenna
tune-up power
Gain
Evaluation
result
Power
density
(mW/cm2 )
(mW/cm2)
(dBm)
(mW)
(dBi)
Numeric
4±1
3.162
0.50
1.12
0.00071
4±1
3.162
0.50
1.12
0.00071
4±1
3.162
0.50
1.12
0.00071
3.5±1
4.5
2.818
0.50
1.12
0.00063
3.5±1
4.5
2.818
0.50
1.12
0.00063
3.5±1
4.5
2.818
0.50
1.12
0.00063
4±1
3.162
0.50
1.12
0.00071
4±1
3.162
0.50
1.12
0.00071
4±1
3.162
0.50
1.12
0.00071
FPCB Antenna gain: 4.5dBi:
Channel
Freq. (MHz)
conducted
power
modulation
(dBm)
2402
2441
GFSK
2480
2402
2441
π/4-DQPSK
2480
2402
2441
8DPSK
2480
3.15
4.63
4.82
2.66
4.13
4.3
4.5
4.68
Max
Tune-up
power (dBm)
Antenna
tune-up power
Gain
Evaluation
result
Power
density
(mW/cm2 )
(mW/cm2)
(dBm)
(mW)
(dBi)
Numeric
4±1
3.162
0.50
2.82
0.00177
4±1
3.162
0.50
2.82
0.00177
4±1
3.162
0.50
2.82
0.00177
3.5±1
4.5
2.818
0.50
2.82
0.00158
3.5±1
4.5
2.818
0.50
2.82
0.00158
3.5±1
4.5
2.818
0.50
2.82
0.00158
4±1
3.162
0.50
2.82
0.00177
4±1
3.162
0.50
2.82
0.00177
4±1
3.162
0.50
2.82
0.00177
Evaluation
result
Power
density
(mW/cm2 )
(mW/cm2)
BLE:
Operation Frequency: BT4.0: 2402MHz~2480MHz
Power density limited: 1mW/ cm2
Antenna Type: Ceramic Antenna& FPCB Antenna;
Antenna gain: 0.5dBi,
R=20cm
Bluetooth DTS;
Ceramic Antenna gain: 0.5dBi:
Channel
Freq. (MHz)
conducted
power
modulation
(dBm)
2402
2440
GFSK
2480
-0.41
1.03
1.25
Max
Tune-up
power (dBm)
Antenna
tune-up power
Gain
(dBm)
(mW)
(dBi)
Numeric
0.5±1
1.5
1.413
0.50
1.12
0.00032
0.5±1
1.5
1.413
0.50
1.12
0.00032
0.5±1
1.5
1.413
0.50
1.12
0.00032
Evaluation
result
Power
density
(mW/cm2 )
(mW/cm2)
FPCB Antenna gain: 4.5dBi:
Channel
Freq. (MHz)
conducted
power
modulation
(dBm)
2402
2440
2480
GFSK
-0.41
1.03
1.25
Max
Tune-up
power (dBm)
Antenna
tune-up power
Gain
(dBm)
(mW)
(dBi)
Numeric
0.5±1
1.5
1.413
0.50
2.82
0.00079
0.5±1
1.5
1.413
0.50
2.82
0.00079
0.5±1
1.5
1.413
0.50
2.82
0.00079
Conclusion:
For the max result : 0.01256≤ 1.0 for Max Power Density, No SAR is required.
Signature:
Date: 2017-06-02
NAME AND TITLE (Please print or type): Jason Chen/Manager
COMPANY (Please print or type): Shenzhen NTEK Testing Technology Co., Ltd./ 1/F, Building E,
Fenda Science Park, Sanwei Community, Xixiang Street Bao’an District, Shenzhen 518126 P.R.
China
Download: WRTNODE7 MT7697module RF Exposure Info MPE Beijing wanglianzhiyuan Tech Inc
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Document ID3422492
Application IDhmiMLO9uodxhY0u9csswTQ==
Document DescriptionRF Exposure
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize8.44kB (105518 bits)
Date Submitted2017-06-12 00:00:00
Date Available2017-06-12 00:00:00
Creation Date2017-06-02 15:11:52
Producing SoftwareAcrobat Distiller 15.0 (Windows)
Document Lastmod2017-06-02 15:12:09
Document TitleRF Exposure Info MPE
Document CreatorPScript5.dll Version 5.2.2
Document Author: ntek205

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