RF Exposure

FCC ID: 2ATBXK140

RF Exposure Info

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 RF Exposure Report


 FCC ID: 2ATBXK140

 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                        11±1.5dBm
802.11g                        15±1.5dBm
802.11n20                      17±1dBm
802.11n40                      17±1dBm


ANT Gain (G)
Antenna number: PIFA Antenna
Antenna number: 2
Antenna A gain : 2.97dBi
Antenna B gain : 2.97dBi
MIMO technology Directional gain= 5.98dBi
(gain of antenna in linear scale=3.96)


  Protocol         ANT              Channel               Output     Output     Power Density    Limit
               gain(gain of     Frequency(MHz)           Power to    Power to     (mW/cm²)      (mW/cm²)
                antenna in                               Antenna     Antenna
               linear scale)                                 (dBm)    (mW)

   802.11b          3.96                 2437                12.5     17.78         0.014          1

   802.11g          3.96                 2412                16.5     44.47         0.035          1

  802.11n20         3.96                 2412                18.0     63.10         0.049          1

  802.11n40         3.96                 2422                18.0     63.10         0.049          1




5G WIFI
Mode                                            802. 11a/ n(HT20)/ac(VHT20:5180-5240MHz
                                                802.11n(HT40)/ac(VHT40): 5.190GHz-5.230GHz
                                                802.11ac(VHT80): 5.210GHz

Detector                                        PEAK
802. 11a                                        5.5±1.5dBm
802. 11a/ n(HT20)/ac                            8±1dBm
802.11n(HT40)/ac(VHT40)                         8±1dBm
802.11ac(VHT80)                                 8±1dBm


ANT Gain (G)
Antenna number: PIFA Antenna
Antenna number: 2
Antenna A gain : 2.97dBi
Antenna B gain : 2.97dBi
MIMO technology Directional gain= 5.98dBi
(gain of antenna in linear scale=3.96)


  Protocol         ANT              Channel               Output     Output     Power Density    Limit
               gain(gain of     Frequency(MHz)           Power to    Power to     (mW/cm²)      (mW/cm²)
               antenna in                                Antenna     Antenna
               linear scale)                                 (dBm)    (mW)

  802.11a          3.96                  5240                 7.0      5.01        0.0039          1

 802.11n/ac        3.96                  5240                 9.0      7.94        0.0062          1
   (HT20)
 802.11n/ac        3.96                  5230                 9.0      7.94        0.0062          1
   (HT40)
 802.11ac(         3.96                  5210                 9.0      7.94        0.0062          1
   HT80)


5G WIFI

Mode                               802.11a/n(HT20)/ac(VHT20):5.745GHz-5.825GHz
                                   802.11n(HT40)/ac(VHT40): 5.755GHz-5.795GHz
                                   802.11ac(VHT80): 5.775GHz
Detector                           PEAK
802. 11a                           5.5±2.5dBm
802. 11n(HT20)/ac                  8.5±1dBm
802.11n(HT40)/ac(VHT40)            8.5±1dBm
802.11ac(VHT80)                    8.5±1dBm


ANT Gain (G)
Antenna number: PIFA Antenna
Antenna number: 2
Antenna A gain : 2.97dBi
Antenna B gain : 2.97dBi
MIMO technology Directional gain= 5.98dBi
(gain of antenna in linear scale=3.96)


  Protocol         ANT              Channel         Output     Output     Power Density    Limit
               gain(gain of     Frequency(MHz)     Power to    Power to     (mW/cm²)      (mW/cm²)
               antenna in                          Antenna     Antenna
               linear scale)                        (dBm)       (mW)

  802.11a          3.96                  5825        8.0         6.31           0.0049       1

 802.11n/ac        3.96                  5825        9.5         8.91           0.0070       1
   (HT20)
 802.11n/ac        3.96                  5230        9.5         8.91           0.0070       1
   (HT40)
 802.11ac(         3.96                  5210        9.5         8.91           0.0070       1
   HT80)


BT

Mode                               2402-2480MHz
Detector                           PEAK
BLE GFSK                           -7.5±2dBm
BR+EDR GFSK                        6.5±1.5dBm
BR+EDR
                                   8±1.5dBm
π /4-DQPSK
BR+EDR 8DPSK                       8.5±1.5dBm


ANT Gain (G)
Antenna number: PIFA Antenna
Antenna number: 2
Antenna A gain : 2.97dBi
 (gain of antenna in linear scale=1.98)


     Protocol     ANT gain(gain           Channel   Output      Output     Power Density    Limit
                  of antenna in    Frequency(MHz)   Power to    Power to     (mW/cm²)      (mW/cm²)
                   linear scale)                    Antenna     Antenna
                                                     (dBm)       (mW)

  BLE-GFSK             1.98                2402       -5.5        0.28        0.0002          1

     BR+EDR            1.98                2402       7.0         5.01        0.0039          1
      GFSK
     BR+EDR            1.98                2402       8.5         7.08        0.0055          1
  π/4-DQPSK
     BR+EDR            1.98                2402       10          10          0.0078          1
     8DPSK




Remark: BT& 2.4G WIFI&5G WIFI does not work at the same time.



Document Created: 2019-06-05 11:11:02
Document Modified: 2019-06-05 11:11:02

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