RF Exposure

FCC ID: Q9SAWRDRP9050

RF Exposure Info

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FCCID_4375285

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320009-00A

FCC §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE)
Applicable Standard
According to 1.1310, 2.1091 systems operating under the provisions of this section shall be operated in a
manner that ensures the public is not exposed to RF energy level in excess of the communication
guidelines.

Limits for Maximum Permissible Exposure (MPE)

Limits for Occupational/Controlled Exposure
Electric Field Averaging Time
Frequency Magnetic Field Power Density (S)
Strength (E) |E|, |H| or S
Range (MHz) Strength (H) (A/m) (mW/cm2)
(V/m) (minutes)
0.3- 3.0 614 1.63 (100)* 6
2
3.0 - 30 1842/f 4.89/f (900/f )* 6
30-300 61.4 0.163 1.0 6
300-1500 / / f/300 6
1500-100,000 / / 5 6

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

MPE Calculation
Prediction of power density at the distance of the applicable MPE limit

S = PG/4R2
Where: S = 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
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm);

MPE Results

Antenna Gain Maximum
Operation Power
Average output Evaluation Power
Frequency Duty Density
power including Distance Density
(MHz) (dBi) (numeric) Cycle Limit
Tune-up Tolerance (cm) (mW/cm2)
(%) (mW/cm2)
(mW)
400-470 0 1.0 50000 50 70 0.41 1.33

Note: the maximum power including Tune-up Tolerance is 50 W.

Result: The device meet FCC MPE at 70 cm distance

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Document Created: 2019-07-26 10:11:54
Document Modified: 2019-07-26 10:11:54

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