MPE (802.11n)

FCC ID: NDD9564751027

RF Exposure Info

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FCCID_1479402

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    FCC TEST REPORT                   Report No. : FR0D2828AI




       Appendix A. Maximum Permissible Exposure




                                        Page No.   : A1 of A4
                                        FCC ID     : NDD9564751027


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    FCC TEST REPORT                                                                  Report No. : FR0D2828AI


    1. Maximum Permissible Exposure
    1.1. Applicable Standard
        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 levels in excess limit for maximum permissible
        exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been
        defined as a mobile device whereby a distance of 0.2 m normally can be maintained between the user
        and the device.
        (A) Limits for Occupational / Controlled Exposure
                                                                                                  Averaging Time
          Frequency Range         Electric Field        Magnetic Field      Power Density (S)
                                                                                                    |E|²,|H|² or S
                 (MHz)          Strength (E) (V/m) Strength (H) (A/m)           (mW/ cm²)
                                                                                                      (minutes)
                0.3-3.0                  614                  1.63                  (100)*                 6
                 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
                                                                                                  Averaging Time
          Frequency Range         Electric Field        Magnetic Field      Power Density (S)
                                                                                                    |E|²,|H|² or S
                 (MHz)          Strength (E) (V/m) Strength (H) (A/m)           (mW/ cm²)
                                                                                                      (minutes)
               0.3-1.34                  614                  1.63                  (100)*                30
                1.34-30                 824/f                2.19/f                (180/f)*               30
                30-300                  27.5                 0.073                    0.2                 30
              300-1500                                                             F/1500                 30
            1500-100,000                                                              1.0                 30
        Note: f = frequency in MHz ; *Plane-wave equivalent power density

    1.2. MPE Calculation Method

                    30  P  G                                                 E2
        E (V/m) =                              Power Density:    Pd (W/m²) =
                        d                                                      377
        E = Electric field (V/m)
        P = Peak RF output power (W)
        G = EUT Antenna numeric gain (numeric)
        d = Separation distance between radiator and human body (m)
        The formula can be changed to

        Pd =
               30  P  G
                377  d 2
        From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the
        gain of the used antenna, the RF power density can be obtained.




                                                                                       Page No.   : A2 of A4
                                                                                       FCC ID     : NDD9564751027


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    FCC TEST REPORT                                                        Report No. : FR0D2828AI


    1.3. Calculated Result and Limit
        Antenna Type : Dipole Antenna
        Max Conducted Power for IEEE 802.11n (20MHz) port A: 18.87dBm
          Test     Min. User                                  Conducted     Conducted Power Density
                                 Gain (dBi)   Numeric Gain
          Mode   Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
           5G         20             3          1.584893         18.87        77.0903         0.0306


        Max Conducted Power for IEEE 802.11n (20MHz) port B: 14.85dBm
          Test     Min. User                                  Conducted     Conducted Power Density
                                 Gain (dBi)   Numeric Gain
          Mode   Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
           5G         20             3          1.584893         14.85        30.5492         0.0121
        IEEE 802.11n (20MHz) port A + port B Power Density = 0.0306 + 0.0121 = 0.0427 (mW/cm2)




        Max Conducted Power for IEEE 802.11n (40MHz) port A: 17.98dBm
          Test     Min. User                                  Conducted     Conducted Power Density
                                 Gain (dBi)   Numeric Gain
          Mode   Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
           5G         20             3          1.584893         17.98        62.8058         0.0249


        Max Conducted Power for IEEE 802.11n (40MHz) port B: 14.28dBm
          Test     Min. User                                  Conducted     Conducted Power Density
                                 Gain (dBi)   Numeric Gain
          Mode   Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
           5G         20             3          1.584893         14.28        26.7917         0.0106
        IEEE 802.11n (40MHz) port A + port B Power Density = 0.0249 + 0.0106 = 0.0355 (mW/cm2)




                                                                              Page No.   : A3 of A4
                                                                              FCC ID     : NDD9564751027


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    FCC TEST REPORT                                                        Report No. : FR0D2828AI

       Max Conducted Power for IEEE 802.11n (20MHz) port A: 19.78dBm
        Test      Min. User                                  Conducted     Conducted Power Density
                                Gain (dBi)   Numeric Gain
        Mode    Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
         2.4G        20              3         1.584893         19.78        95.0605           0.0378


       Max Conducted Power for IEEE 802.11n (20MHz) port B: 16.78dBm
        Test      Min. User                                  Conducted     Conducted Power Density
                                Gain (dBi)   Numeric Gain
        Mode    Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
         2.4G        20              3         1.584893         16.78        47.6431           0.0189
       IEEE 802.11n (20MHz) port A + port B Power Density = 0.0378 + 0.0189 = 0.0567 (mW/cm2)




       Max Conducted Power for IEEE 802.11n (40MHz) port A: 19.62dBm
        Test      Min. User                                  Conducted     Conducted Power Density
                                Gain (dBi)   Numeric Gain
        Mode    Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
         2.4G        20              3         1.584893         19.62        91.6220           0.0364


       Max Conducted Power for IEEE 802.11n (40MHz) port B: 17.14dBm
        Test      Min. User                                  Conducted     Conducted Power Density
                                Gain (dBi)   Numeric Gain
        Mode    Distance (cm)                               Power (dBm)    Power (mW)  (mW/cm2)
         2.4G        20              3         1.584893         17.14        51.7607           0.0206
       IEEE 82.11n (40MHz) port A + port B Power Density = 0.0364 + 0.0206 = 0.0570 (mW/cm2)




                                                                             Page No.   : A4 of A4
                                                                             FCC ID     : NDD9564751027



Document Created: 2019-10-27 07:10:39
Document Modified: 2019-10-27 07:10:39

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