MPE

FCC ID: H8N-WLU5022

RF Exposure Info

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FCC TEST REPORT                       Report No.: FR9O0702AN




      Appendix A. Maximum Permissible Exposure




                                       Page No.   : A1 of A3
                                       FCC ID     : H8N-WLU5022


FCC TEST REPORT                                                                               Report No.: FR9O0702AN


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 A3
                                                                                               FCC ID       : H8N-WLU5022


FCC TEST REPORT                                                            Report No.: FR9O0702AN


1.3 Calculated Result and Limit

    Antenna Type : Printed Antenna
    For Single Chain:
    Max Conducted Power for IEEE 802.11a: 13.49dBm
                                                                                              Power
      Test      Min. User                                    Conducted     Conducted
                              Gain (dBi)   Numeric Gain                                       Density
     Mode     Distance (cm)                                  Power (dBm)   Power (mW)
                                                                                            (mW/cm2)
       5G            20          4.06        2.54683            13.49        22.3357          0.0113


    Max Conducted Power for IEEE 802.11n (20MHz): 14.35dBm
                                                                                              Power
      Test      Min. User                                    Conducted     Conducted
                              Gain (dBi)   Numeric Gain                                       Density
     Mode     Distance (cm)                                  Power (dBm)   Power (mW)
                                                                                            (mW/cm2)
       5G            20          4.06        2.54683            14.35        27.2270          0.0138


    Max Conducted Power for IEEE 802.11n (40MHz): 14.62dBm
                                                                                              Power
      Test      Min. User                                    Conducted     Conducted
                              Gain (dBi)   Numeric Gain                                       Density
     Mode     Distance (cm)                                  Power (dBm)   Power (mW)
                                                                                            (mW/cm2)
       5G            20          4.06        2.54683            14.62        28.9734          0.0147




    For Two Chain:
    Max Conducted Power for IEEE 802.11n (20MHz): 16.66dBm
                                                                                              Power
      Test      Min. User                                    Conducted     Conducted
                              Gain (dBi)   Numeric Gain                                       Density
     Mode     Distance (cm)                                  Power (dBm)   Power (mW)
                                                                                            (mW/cm2)
       5G            20          4.06        2.54683            16.66        46.3447          0.0235


    Max Conducted Power for IEEE 802.11n (40MHz): 16.76dBm
                                                                                              Power
      Test      Min. User                                    Conducted     Conducted
                              Gain (dBi)   Numeric Gain                                       Density
     Mode     Distance (cm)                                  Power (dBm)   Power (mW)
                                                                                            (mW/cm2)
       5G            20          4.06        2.54683            16.76        47.4242          0.0240




                                                                            Page No.    : A3 of A3
                                                                            FCC ID      : H8N-WLU5022



Document Created: 2009-11-19 14:44:36
Document Modified: 2009-11-19 14:44:36

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