Parts List/Tune Up Info

SGS-CSTC Standards Technical Services Co., Ltd. Shanghai
Branch
Report No.: SHEM200700531603
Page: 8 of 8
5.2 MPE Calculation
For WiFi:
According to the formula S=P/4πR², we can calculate S which is MPE.
Note:
1) P (mW)
2) R = distance to the center of radiation of antenna (in meter) = 20cm
3) MPE limit = 1mW/cm²
For WIFI
The max. antenna gain is 3.73 dBi
Max.
Conducted
Power
P(mW)
Gain in Linear
Scale
G
Operation
Distance
R(cm)
Power
Density
(mW/cm
2
)
Limit
(mW/cm
2
)
Result
17.06 2.360 20 0.00801 1 Pass
For 13.56MHz: 112.02dBuV/m=0.4V/m< 60.77 V/m.
The 2.4G band and 13.56MHz function can simultaneous transmitting.But the maximum rate of MPE
is 0.008/1.0+0.4/60.77=0.01<=1.0. according to the KDB447498 section 7.2 determine the device is
exclusion from SAR test.
--End of the Report--