MPE Prediction

FCC ID: NDD9577280704

RF Exposure Info

Download: PDF
FCCID_794252

MPE Prediction

FCC Rule: 15.247(b)(5)


Systems operating under the provisions of this section shall be operated in a manner that ensures that
the public is not exposed to radio frequency energy levels in excess of the Commission’s guidelines.
See §1.1307(b)(1) of this Chapter.


LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Frequency            Electric Field        Magnetic Field       Power Density         Average time
Range                Strength (V/m)        Strength (A/m)       (mW/cm2)              (minutes)
(MHz)
                            (A)Limits For Occupational / Control Exposures
30-300               61.4                  0.613                1.0                   6
300-1500             …                     …                    F/300                 6
1500-100,000         …                     …                    5                     6
                     (B)Limits For General Population / Uncontrolled Exposure
30-300               27.5                  0.073                0.2                   30
300-1500             …                     …                    F/1500                30
1500-100,000         …                     …                    1.0                   30
F = Frequency in MHz



Prediction of MPE limit at a given distance

Equation from page 18 of OET Bulletin 65, Edition 97-01

         PG
S = --------------
       4πR²

where:
S = power density
P = power input to the 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:                   14.88 (dBm)

Maximum peak output power at antenna input terminal:                   30.76 (mW)


Antenna gain(maximal):                                                  5 (dBi)

Prediction distance:                                                    20 (cm)


Prediction frequency:                                                2462 (MHz)

MPE limit for uncontrolled exposure at prediction frequency:           1.0 (mW/cm²)


Power density at prediction frequency:                              0.019 (mW/cm²)




The manual instruct the user to install and operate the device in a minimum distance of 20 cm between
antenna and the user’s body.



Document Created: 2007-05-02 17:12:51
Document Modified: 2007-05-02 17:12:51

© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC