RF exposure

FCC ID: 2ANOG-A88

RF Exposure Info

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FCCID_4141976

RF Exposure Report FCC ID: 2ANOG-A88 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. 5G WIFI Mode IEEE 802.11a/n(HT20) 5.180GHz-5.240GHz IEEE 802.11n(HT40) 5.190GHz-5.230GHz Detector PEAK 802.11 a/n (HT20) 7±1dBm 802.11 n (HT40) 9±1dBm ANT Gain (G) Antenna A gain : 0.51dBi Antenna B gain : 0.51dBi MIMO technology Directional gain= 3.52dBi (gain of antenna in linear scale=2.25) ANT Output Output Channel Power to Power Gain(gain of Power to Limit Protocol Frequency Antenna Density antenna in (MHz) Antenna (mW/cm²) (mW/cm²) linear (dBm) (mW) 802.11 a/n(HT20) scale) 2.25 5200 8 6.3096 0.00283 1 802.11 n(HT40) 2.25 5190 10 10.0000 0.00448 1

5G WIFI Mode IEEE 802.11a/n(HT20) 5.260GHz-5.320GHz IEEE 802.11n(HT40) 5.270GHz-5.310GHz Detector PEAK 802.11 a/n (HT20) 4±1dBm 802.11 n (HT40) 4±1dBm ANT Gain (G) Antenna A gain : 1.35dBi Antenna B gain : 1.35dBi MIMO technology Directional gain= 4.36dBi (gain of antenna in linear scale=2.73) ANT Output Output Channel Power to Power Gain(gain of Power to Limit Protocol Frequency Antenna Density antenna in (MHz) Antenna (mW/cm²) (mW/cm²) linear (dBm) (mW) 802.11 a/n(HT20) scale) 2.73 5320 5 3.1623 0.00172 1 802.11 n(HT40) 2.73 5310 5 3.1623 0.00172 1 5G WIFI Mode IEEE 802.11a/n(HT20) 5.500GHz-5.700GHz IEEE 802.11n(HT40) 5.510GHz-5.670GHz Detector PEAK 802.11 a/n (HT20) 5±1dBm 802.11 n (HT40) 6±1dBm ANT Gain (G) Antenna A gain : 2.77dBi Antenna B gain : 2.77dBi MIMO technology Directional gain= 5.78dBi (gain of antenna in linear scale=3.78) Channel Output Output ANT Gain(gain Power Frequenc Power to Power to Limit Protocol of antenna in y Antenna Antenna Density (mW/cm²) linear scale) (MHz) (dBm) (mW) (mW/cm²) 802.11 3.78 5700 6 3.9811 0.00300 1 a/n(HT20) 802.11 n(HT40) 3.78 5670 7 5.0119 0.00377 1

5G WIFI Mode IEEE 802.11a/n (HT20)5.745GHz-5.825GHz IEEE 802.11a/n (HT40)5.755GHz-5.795GHz Detector PEAK 802.11 a/n (HT20) 5±1dBm 802.11 n (HT40) 6±1dBm ANT Gain (G) Antenna A gain : 2.71dBi Antenna B gain : 2.71dBi MIMO technology Directional gain= 5.72dBi (gain of antenna in linear scale=3.73) ANT Output Output Channel Power to Power Gain(gain of Power to Limit Protocol Frequency Antenna Density antenna in (MHz) Antenna (mW/cm²) (mW/cm²) linear (dBm) (mW) 802.11 a/n(HT20) scale) 3.73 5745 6 3.9811 0.00296 1 802.11 n(HT40) 3.73 5755 7 5.0119 0.00372 1


Document Created: 2019-01-23 06:50:38
Document Modified: 2019-01-23 06:50:38
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