RF Exposure

FCC ID: 2AKS9TM990

RF Exposure Info

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Bay Area Compliance Laboratories Corp. (Dongguan)                              Report No.: RXM190308050-00B

§1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Applicable Standard
According to subpart §1.1310, systems operating under the provisions of this section shall be operated in a
manner that ensures that the public is not exposed to radio frequency energy level in excess of the
Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

                           (B) Limits for General Population/Uncontrolled Exposure
 Frequency Range         Electric Field       Magnetic Field        Power Density            Averaging Time
       (MHz)            Strength (V/m)        Strength (A/m)           (mW/cm2)                (minutes)
      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; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.


Calculation formula:

Prediction of power density at the distance of the applicable MPE limit
S = PG/4R² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the power gain
factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);




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Bay Area Compliance Laboratories Corp. (Dongguan)                                Report No.: RXM190308050-00B

Calculated Data:

                                                      Conducted
                                                     output power     Evaluation      Power      MPE
                 Frequency       Antenna Gain
       Mode                                        including Tune-     Distance      Density     Limit
                   (MHz)
                                                     up Tolerance        (cm)       (mW/cm2)   (mW/cm2)
                               (dBi)   (numeric)   (dBm) (mW)
      WCDMA
                  1850-1910      3       2.00        23      199.53      20.00         0.08        1.0
       band 2
      WCDMA
                   824-849       3       2.00        23      199.53      20.00         0.08       0.55
       Band 5
        LTE
                  1850-1910      3       2.00        23      199.53      20.00         0.08        1.0
       Band 2
        LTE
                  1710-1755      3       2.00        23      199.53      20.00         0.08        1.0
       band 4
        LTE
                   824-849       3       2.00        24      251.19      20.00         0.10       0.55
       Band 5
        LTE
                   699-716       3       2.00        24      251.19      20.00         0.10       0.47
      Band 12
        LTE
                   704-716       3       2.00        24      251.19      20.00         0.10       0.47
      Band 17

Note: the Max. Target Power including Tolerance was declared by manufacturer.

Result: Compliance, The device meets MPE requirement for Devices Used by the General Public
(Uncontrolled Environment) at distance ≥20 cm.




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Document Created: 2019-05-10 17:49:51
Document Modified: 2019-05-10 17:49:51

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