1532E Series UNII-2 Band MPE

FCC ID: LDK102089P

RF Exposure Info

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FCCID_2129571

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                Maximum Permissible Exposure (MPE) Calculations
                          For AIR—CAP1532E—A—K$ in the UNII—2 Band

15.407; U—NIl devices are subject to the radio frequency radiation exposure requirements specified in
        Sec. 1.1307(b), Sec. 2.1091 and Sec. 2.1093 of this chapter, as appropriate. All equipment shall
        be considered to operate in a _ general population/uncontrolled" environment. Applications for
        equipment authorization of devices operating under this section must contain a statement
        confirming compliance with these requirements for both fundamental emissions and unwanted
        emissions. Technical information showing the basis for this statement must be submitted to the
        Commission upon request.

        Given
                E=V(30*P*G)/d and       S=EA2/3770
        where
                E=Field Strength in Volts/meter
                P=Power in Watts
                G=Numeric Antenna Gain
                d=Distance in meters
                S=Power Density in mW/em*A2

        Combine equations and rearrange the terms to express the distance as a function of the
        remaining variables:
                d=((30*P*G)/(37708S))

        Changing to units of power in mW and distance in cm, using:
               P{mW)=P(W)/1000                 d(cm)=100*d(m)
        yields
               d=100*/((30*(P/1000)*G)/(3770*8))
                d=0.282*~/(P*G/S)
        where
                d=Distance in cm
                P=Power in mW
                G=Numerica Antenna Gain
                S=Power Density in mW/emA2

        Substituting the logarithmic form of power and gain using:
                 P(mW)=104(P(dBm)/10})           G(numeric)=104(G(dBi)/10)
        yields
                d=0.282*104((P+G)/20)WNS                                                 Equation (1)
        and
                s=((0.282*104((P+G)/20))/d)42                                            Equation (2)
        where
                d=MPE distance in cm
                P=Power in dBm
                G=Antenna Gain in dBi
                S=Power Density in mW/icmA2


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   C1ISCO


        Equation (1) and the measured peak power are used to calculate the MPE distance. Note that for
        mobile or fixed location transmitters such as an access point, the minimum separation distance is
        20 cm even if the calculations indicate that the MPE distance may be less.

        S=1mW/cemA2 maximum. The highest supported antenna gain is 14 dBi. Using the peak power
        levels recorded in the test report along with Equation 1 above, the MPE distances are calculated
        as follows.

                                       Peéak
                          Power      Transmit| Antenna|        MPE
         Frequency        Density      Power      Gain     Distance| Limit] Margin
           (MHz)       (mW/cm*2)|      (dBm)      (dBi)      (cm)    |(ecm)| (cm)
            5280             1          12.1        14       5.69      20    14.31
            5320             1          12.1        14       5.69      20    14.31
            5500             1          12.2        14       5.76      20    14.24
            5560             1          13.6        14       6.76      20    13.24
            5700             1          12.1        14       5.69      20    14.31
        MPE Calculations


To maintain compliance, installations will assure a separation distance of at least 20cm.

Using Equation 2, the MPE levels (s) at 20 cm are calculated as follows:

                                     Peak
                      MPE    Transmit| Antenna    Power
          Frequency Distance| Power      Gain    Density    Limit     Margin
            (MH2z)    (cm)     (dBm)     (dBi) (mW/em*2) (mW/cm*2)| (mW/cm*2)
             5260      20       12.1       14      0.08       1        0.92
             5320      20       12.1       14      0.08       1        0.92
             5500      20       12.2       14      0.08       1        0.92
             5550      20       13.6       14      0.11       1        0.89
             5700      20       12.1       14      0.08       1        0.92




Test Enginegr:
Date:_ZA//Z2/1]     /.2



Document Created: 2019-11-16 20:07:27
Document Modified: 2019-11-16 20:07:27

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