MPE

FCC ID: 2AHRH-FJ1000LS

RF Exposure Info

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FCCID_4299535

                                                                             FCC ID: 2AHRH-FJ1000LS



RF Exposure Evaluation
FCC Limits
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)
                        Electric field
Frequency range                            Magnetic field strength      Power density       Averaging time
                          strength                                                      2
      (MHz)                                           (A/m)               (mW/cm )             (minutes)
                           (V/m)
                              (A) Limits for Occupational/Controlled Exposures
     0.3–3.0                614                       1.63                  *(100)                 6
                                                                                    2
      3.0–30               1842/f                     4.89/f               *(900/f )               6
     30–300                 61.4                      0.163                  1.0                   6
    300–1500                                                                f/300                  6
  1500–100,000                                                                5                    6
                          (B) Limits for General Population/Uncontrolled Exposure
     0.3–1.34               614                       1.63                  *(100)                 30
     1.34–30                824/f                     2.19/f               *(180/f2)               30
     30–300                 27.5                      0.073                  0.2                   30
    300–1500                                                                f/1500                 30
  1500–100,000                                                               1.0                   30
f = frequency in MHz
Friis 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 center of the radiator in cm


Pd id the limit of MPE, If we know the maximum gain of the antenna and the total power input to the antenna,
through the calculation, we will know the distance r where the MPE limit is reached.
Test Procedure
Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest
channel individually.


                                                                      FCC ID: 2AHRH-FJ1000LS



Test Result of RF Exposure Evaluation
LTE
                                                              Power
              Frequency                       Output power
                            Output power to                  Density at      Limit
   Band         (MHz)                          to antenna                             Result
                                                             R=20cm        (mW/cm2)
                             antenna (dBm)       (mW)
                                                             (mW/cm2)

LTE Band 12      711             23.95          248.313      0.05804         0.474    PASS

LTE Band 25    1882.5            22.96          197.697      0.03426          1.0     PASS

LTE Band 26     821.5            23.96          248.886      0.05817         0.548    PASS

Remark:

     Antenna gain:     LTE Band 12: 0.7dBi
                       LTE Band 25: -0.6dBi
                       LTE Band 26: 0.7dBi



Document Created: 2019-05-27 06:54:42
Document Modified: 2019-05-27 06:54:42

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