RF Exposure

FCC ID: 2AB8788121

RF Exposure Info

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FCCID_3619063

Bay Area Compliance Laboratories Corp. (Chengdu)

FCC §15.247 (i) & §1.1310 & §2.1091- MAXIMUM PERMISSIBLE
EXPOSURE (MPE)
Applicable Standard
According to subpart 15.247(i)and subpart §1.1310, 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 level in excess of the Commission’s guidelines.

Limits for Maximum Permissible Exposure (MPE) (§1.1310, §2.1091)

(B) Limits for General Population/Uncontrolled Exposure
Frequency Range Electric Field Magnetic Field Power Density Averaging Time
(MHz) Strength (V/m) Strength (A/m) (mW/cm2) (minutes)
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
1500–100,000 / / 1.0 30

f = frequency in MHz; * = Plane-wave equivalent power density;

According to §1.1310 and §2.1091 RF exposure is calculated.

Calculation Formula:

Prediction of power density at the distance of the applicable MPE limit:
S = PG/4R² = power density (in appropriate units, e.g. mW/cm2);
P = power input to the antenna (in appropriate units, e.g., mW);
G = power gain of the antenna in the direction of interest relative to an isotropic radiator, the
power gain factor, is normally numeric gain;
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);

Calculated Data:

Antenna Gain Tune-up Power Evaluation Power MPE
Frequency
Distance Density Limit
(MHz) (dBi) (numeric) (dBm) (mW) (cm) (mW/cm2) (mW/cm2)
2400-
3 2.00 30 1000.00 20.00 0.40 1.0
2483.5
5150-5850 4 2.51 23 199.53 20.00 0.10 1.0

Note:The 2.4GHz and 5GHz band can`t transmit simultaneously

Result: The device meet FCC MPE at 20 cm distance

Report No.: RDG170525007A Page 12 of 71

Document Created: 2017-10-19 10:48:51
Document Modified: 2017-10-19 10:48:51

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