MPE

FCC ID: YR8ES101

RF Exposure Info

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FCCID_1374561

FCC ID：YR8ES101

Maximum Permissible Exposure

as specified in Table 1B of 47 CFR 1.1310 – Limits for Maximum Permissible Exposure
(MPE), Limits for General Population/Uncontrolled Exposure

Frequency range (MHz) Power density (mW/cm²)
300 – 1,500 f/1500
1,500 – 100,000 1.0

Calculations 850 MHz band (824.7 – 848.31 MHz)

Maximum peak output power at antenna input terminal: 33.14 dBm (~2.06 W)

Predicted distance R: 20 cm
Predicted frequency: 848.86 MHz

MPE limit S: 0.5659 mW/cm²

Equation OET bulletin 65, page 18, edition 97-01: S = P*G / (4πR²)

S = power density
P = power input to the antenna
G = numeric gain of the antenna in the direction of interest relative to an isotropic radiator
R = distance to the centre of radiation of the antenna

Maximum allowable antenna gain: max 1.40 dBi

Prediction
The maximum allowable MPE value of 0,5498 mW/cm²will be reached in a distance of
20 cm in case that an antenna with an antenna gain of 1.40 dBi will be used. This
means that the power density levels in a distance of 20 cm are in accordance with the
FCC regulations as long as the used antenna has a gain below 1.40 dBi.

Document Created: 2019-09-03 11:25:18
Document Modified: 2019-09-03 11:25:18

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