MPE Report

FCC ID: 2AF9RWH220-IOT

RF Exposure Info

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FCCID_3940928

$FCC ID : 2AF9RWH220-IOT RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency Electric Field Magnetic Field Power Average Time Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2) Where Pd= Power density in mW/cm2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416$

R= distance between observation point and center of the radiator in cm
Pd the limit of MPE, 1mW/cm2,If we know the maximum gain of the nd total power input to the antenna, through the calculation,
we will know the distance where the MPE limit is reached.
CONCLUSION of simultaneous transmitter：
Both of the WIFI2.4G,WIFI5G,BT,BLE and ZigBee Cannot transmit simultaneously,

11.2 Measurement Result

Wifi 2.4G（MAX power）
Antenna gain: 2 dBi

Channel Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
2412 13.95 12 to 14 14 1.58 0.0079 1
11b 2437 14.77 13 to 15 15 1.58 0.0099 1
2462 15.24 14 to 16 16 1.58 0.0125 1
2412 18.71 17 to 19 19 1.58 0.0250 1
11g 2437 18.75 17 to 19 19 1.58 0.0250 1
2462 19.68 18 to 20 20 1.58 0.0314 1
2412 18.48 17 to 19 19 1.58 0.0250 1
11n HT20 2437 18.93 17 to 19 19 1.58 0.0250 1
2462 19.09 18 to 20 20 1.58 0.0314 1

MIMO
Channel Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
2412 21.35 20 to 22 22 1.58 0.0498 1
11n HT20 2437 21.83 20 to 22 22 1.58 0.0498 1
2462 22.09 21 to 23 23 1.58 0.0627 1

Zigbee
Antenna gain: 3 dBi

Channel Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
2405 1.881 0 to 2 2 2.00 0.0006 1
O-QPSK 2440 1.877 0 to 2 2 2.00 0.0006 1
2480 0.954 -1 to 1 1 2.00 0.0005 1

BT
Antenna gain: 2dBi

Channel Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
2402 -8.770 -10 to -8 -8 1.58 0.00005 1
GFSK 2441 -6.886 -8 to -6 -6 1.58 0.00008 1
2480 -7.054 -9 to -7 -7 1.58 0.00006 1
2402 -10.589 -12 to -10 -10 1.58 0.00003 1
pi/4-DQPSK 2441 -8.575 -10 to -8 -8 1.58 0.00005 1
2480 -8.037 -10 to -8 -8 1.58 0.00005 1
2402 -9.961 -11 to -9 -9 1.58 0.00004 1
8DPSK 2441 -7.939 -9 to -7 -7 1.58 0.00006 1
2480 -7.409 -9 to -7 -7 1.58 0.00006 1
2402 5.004 4 to 6 6 1.58 0.00125 1
GFSK
2440 6.247 5 to 7 7 1.58 0.00157 1
（BLE）
2480 6.374 5 to 7 7 1.58 0.00157 1

Wifi 5G（MAX power）
Antenna gain: 2 dBi

Channel Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
11n(HT 20) 5180 15.94 14 to 16 16 1.58 0.0125 1
11ac 20 5280 15.96 14 to 16 16 1.58 0.0125 1
11a 5580 15.95 14 to 16 16 1.58 0.0125 1
11n(HT 40) 5795 15.93 14 to 16 16 1.58 0.0125 1

MIMO
Channe Measured Max tune-up Antenna Evaluation Power density
Tune-up power
modulation l Freq. power power Gain result Limits
(dBm)
(MHz) (dBm) (dBm) Numeric (mW/cm2 ) (mW/cm2 )
11ac (VHT 40) 5190 18.65 17 to 19 19 1.58 0.0250 1
11ac 20 5280 18.97 17 to 19 19 1.58 0.0250 1
11n(HT 20) 5700 18.76 17 to 19 19 1.58 0.0250 1
11n(HT 40) 5795 18.81 17 to 19 19 1.58 0.0250 1

Document Created: 2018-07-20 10:48:26
Document Modified: 2018-07-20 10:48:26