MPE Calculation

FCC ID: S7A-SP05

RF Exposure Info

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FCCID_1694907

FCC ID: S7A-SP05 ATTACHMENT

** MPE Calculations **
The MPE calculation for this exposure is shown below.

The peak radiated output power (EIRP) is calculated as follows:

EIRP = P + G Where,
EIRP = 5.70 dBm + 0 dBi P = Power input to the antenna (mW)
EIRP = 5.70 dBm G = Power gain of the antenna (dBi)

Power density at the specific separation:
Where,
S = PG/(4R2π)
S = Maximum power density (mW/cm2)

S = (3.72 *1) / (4 * 202 * π) P = Power input to the antenna (mW)
G = Numeric power gain of the antenna
2
S = 0.0007 mW/cm R = Distance to the center of the radiation of the antenna
(20cm = limit for MPE)
The Maximum permissible exposure (MPE) for the general population is 1 mW/cm2 .
The power density does not exceed the 1 mW/cm2 limit.
Therefore, the exposure condition is compliant with FCC rules.
Estimated safe separation:
Where,
R = √(PG / 4π)
P = Power input to the antenna (mW)

R = √(3.72*1 / 4π) G = Numeric power gain of the antenna
R = Distance to the center of the radiation of the antenna
R = 0.54 Cm (20cm = limit for MPE)

The numeric gain(G) of the antenna with a gain specified in dB is determined by:
G = Log-1 (dB antenna gain / 10)
G = Log-1 (0 / 10)
G=1

Document Created: 2019-11-15 05:04:58
Document Modified: 2019-11-15 05:04:58

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