MPE calculation

FCC ID: YOPGS1011MEPS

RF Exposure Info

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FCCID_1763851

RF EXPOSURE

Standard Applicable
According to §1.1307(b)(1), systems operating under the provisions of this section shall be
operated in a manner that ensure that the public is not exposed to radio frequency energy level in
excess of the Commission’s guideline.

This is a Mobile device, the MPE is required.

According to §1.1310 and §2.1093 RF exposure is calculated.

Limits for Maximum Permissive Exposure (MPE)

Frequency Range Electric Field Magnetic Field Power Density Averaging Time
(MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minute)
Limits for General Population/Uncontrolled Exposure
0.3-1.34 614 1.63 *(100) 30
1.34-30 824/f 2.19/f *(180/f2 ) 30
30-300 27.5 0.073 0.2 30
300-1500 / / F/1500 30
1500-15000 / / 1.0 30

F = frequency in MHz
* = Plane-wave equipment power density

MPE Prediction
Prediction of MPE limit at a given distance
Equation from page 18 of OET Bulletin 65, Edition 97-01
S=PG/4πR2
Where: S = Power density
P = Power input to antenna
G = Power gain of the antenna in the direction of interest relative to an isotropic radiator
R = Distance to the center of radiation of the antenna

Maximum peak output power at antenna input terminal: 21.48 (dBm)
Maximum peak output power at antenna input terminal: 140.6047524 (mW)
Duty cycle: 99 (%)
Maximum Pav : 139.1987049 (mW)
Antenna gain (typical): -3.06 (dBi)
Maximum antenna gain: 0.494310687 (numeric)
Prediction distance: 20 (cm)
Prediction frequency: 2412 (MHz)

MPE limit for uncontrolled exposure at prediction 1 (mW/cm2)
Power density at predication frequency at 20 (cm) 0.0136957 (mW/cm^2)

Measurement Result:
The predicted power density level at 20 cm is 0.136957419 (W/m^2)
This is below the uncontrolled exposure limit of 1 mW/cm 2412 MHz

Measurement Result
The predicted power density level at 20 cm is 0.0136957 W/cm2. This is below the uncontrolled
exposure limit of 1 mW/cm2 at 2412MHz.

Document Created: 2012-08-10 19:47:17
Document Modified: 2012-08-10 19:47:17

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