MPE Report

FCC ID: BCGA1408

RF Exposure Info

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FCCID_1486496

REPORT NO: 11U13614-2B                                                          DATE: JUNE 13, 2011
FCC ID: BCGA1408                                                                    IC: 579C-A1408


10.     MAXIMUM PERMISSIBLE EXPOSURE
FCC RULES

§1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of
human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case
of portable devices which shall be evaluated according to the provisions of §2.1093 of this
chapter.




                                          Page 291 of 299
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      This report shall not be reproduced except in full, without the written approval of CCS.


REPORT NO: 11U13614-2B                                                         DATE: JUNE 13, 2011
FCC ID: BCGA1408                                                                   IC: 579C-A1408

IC RULES

IC Safety Code 6, Section 2.2.1 (a) A person other than an RF and microwave exposed worker
shall not be exposed to electromagnetic radiation in a frequency band listed in Column 1 of
Table 5, if the field strength exceeds the value given in Column 2 or 3 of Table 5, when
averaged spatially and over time, or if the power density exceeds the value given in Column 4 of
Table 5, when averaged spatially and over time.




                                         Page 292 of 299
COMPLIANCE CERTIFICATION SERVICES                                           FORM NO: CCSUP4701C
47173 BENICIA STREET, FREMONT, CA 94538, USA          TEL: (510) 771-1000      FAX: (510) 661-0888
     This report shall not be reproduced except in full, without the written approval of CCS.


REPORT NO: 11U13614-2B                                                           DATE: JUNE 13, 2011
FCC ID: BCGA1408                                                                     IC: 579C-A1408


EQUATIONS

Power density is given by:

         S = EIRP / (4 * Pi * D^2)
where
         S = Power density in W/m^2
         EIRP = Equivalent Isotropic Radiated Power in W
         D = Separation distance in m

Power density in units of W/m^2 is converted to units of mWc/m^2 by dividing by 10.


Distance is given by:

         D = SQRT (EIRP / (4 * Pi * S))
where
         D = Separation distance in m
         EIRP = Equivalent Isotropic Radiated Power in W
         S = Power density in W/m^2


For multiple chain devices, and colocated transmitters operating simultaneously in frequency
bands where the limit is identical, the total power density is calculated using the total EIRP
obtained by summing the Power * Gain product (in linear units) of each transmitter.

         Total EIRP = (P1 * G1) + (P2 * G2) + ... + (Pn * Pn)
where
         Px = Power of transmitter x
         Gx = Numeric gain of antenna x


For multiple colocated transmitters operating simultaneously in frequency bands where different
limits apply, a fraction of the exposure limit is established for each band, such that the sum of
the fractions is less than or equal to one.

In the table(s) below, Power and Gain are entered in units of dBm and dBi respectively and
conversions to linear forms are used for the calculations.


LIMITS

For mobile radio equipment operating in the cellular phone band, the lowest power density limit
is calculated using the lowest frequency, as 824 MHz / 1500 = 0.55 mW/cm^2 (FCC) and 824
MHz / 150 = 5.5 W/m^2 (IC).

From FCC §1.1310 Table 1 (B), the maximum value of S = 1.0 mW/cm^2

From IC Safety Code 6, Section 2.2 Table 5 Column 4, S = 10 W/m^2



                                          Page 293 of 299
COMPLIANCE CERTIFICATION SERVICES                                             FORM NO: CCSUP4701C
47173 BENICIA STREET, FREMONT, CA 94538, USA            TEL: (510) 771-1000      FAX: (510) 661-0888
     This report shall not be reproduced except in full, without the written approval of CCS.


REPORT NO: 11U13614-2B                                                               DATE: JUNE 13, 2011
FCC ID: BCGA1408                                                                         IC: 579C-A1408


RESULTS

Worst-case of 11a, HT20, HT40 (2 chains)

Multiple chain or colocated transmitters
 Band      Mode       Chain Separation        Output     Antenna     EIRP     EIRP     IC Power FCC Power
                      for      Distance      AV Power     Gain                          Density      Density
                     MIMO         (m)          (dBm)      (dBi)     (dBm)      (W)     (W/m^2)     (mW/cm^2)
5 GHz     WLAN         1                       15.00       3.14      18.14    0.07
5 GHz     WLAN         2                       16.80       2.38      19.18    0.08
         Combined                0.20                                         0.15       0.29         0.029




Worst-case of 11a, HT20, HT40 (3 chains)

Multiple chain or colocated transmitters
Band      Mode       Chain Separation       Output     Antenna    EIRP    EIRP IC Power FCC Power
                     for     Distance      AV Power     Gain                      Density         Density
                    MIMO        (m)         (dBm)       (dBi)     (dBm)     (W)   (W/m^2)       (mW/cm^2)
5 GHz     WLAN        1                      13.00      3.14      16.14   0.04
5 GHz     WLAN        2                      14.90      2.23      17.13   0.05
5 GHz     WLAN        3                      16.50      2.38      18.88   0.08
        Combined               0.20                                       0.17        0.34         0.034




                                            Page 294 of 299
COMPLIANCE CERTIFICATION SERVICES                                              FORM NO: CCSUP4701C
47173 BENICIA STREET, FREMONT, CA 94538, USA             TEL: (510) 771-1000      FAX: (510) 661-0888
     This report shall not be reproduced except in full, without the written approval of CCS.



Document Created: 2011-06-16 11:54:22
Document Modified: 2011-06-16 11:54:22

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