RF Exposure Info

FCC ID: A4R-W1

RF Exposure Info

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FCCID_1731083

REPORT NO: 11U14119-2 DATE: MAY 12, 2012
FCC ID: A4R-W1

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 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

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

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

RESULTS

Band Mode Separation Output Antenna IC Power FCC Power
Distance Power Gain Density Density
(m) (dBm) (dBi) (W/m^2) (mW/cm^2)
5 GHz WLAN 0.20 13.85 6.00 0.19 0.019

Page 64 of 69
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Document Created: 2019-10-09 15:55:36
Document Modified: 2019-10-09 15:55:36

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