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MPE report

Shenzhen Fowke Innovation Technology Co., Ltd E306WH 4K WIFI Solar Hunting camera 2AQKA-E306WH 2AQKAE306WH e306wh

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Document DEVICE REPORTGetApplicationAttachment.html?id=7390114
FCC ID:2AQKA-E306WH

RF Exposure Evaluation
Limits The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) radiation as specified in 1.1307(b)

Limits for Maximum Permissible Exposure (MPE)

Frequency range (MHz)

Electric field strength (V/m)

Magnetic field strength (A/m)

Power density (mW/cm2)

Averaging time (minutes)

(A) Limits for Occupational/Controlled Exposures

0.3­3.0

614

1.63

*(100)

6

3.0­30

1842/f

4.89/f

*(900/f2)

6

30­300

61.4

0.163

1.0

6

300­1500

f/300

6

1500­100,000

5

6

(B) Limits for General Population/Uncontrolled Exposure

0.3­1.34

614

1.63

*(100)

30

1.34­30

824/f

2.19/f

*(180/f2)

30

30­300

27.5

0.073

0.2

30

300­1500

f/1500

30

1500­100,000

1.0

30

f = frequency in MHz Friis transmission formula: Pd = (Pout*G)/(4*pi*r2)

Where Pd = power density in mW/cm2, Pout = output power to antenna in mW; G = gain of antenna in linear scale, Pi = 3.1416; R = distance between observation point and center of the radiator in cm

Pd id the limit of MPE, 1 mW/cm2. If we know the maximum gain of the antenna and the total power input to the antenna, through the calculation, we will know the distance r where the MPE limit is reached. Test Procedure Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel individually.

Test Result of RF Exposure Evaluation

Mode GFSK

BLE Mode

Frequency Output power to Output power to Antenna Power Density at

Limit

Result

(MHz)

antenna (dBm) antenna (mW) Gain (dBi) R=20cm (mW/cm2) (mW/cm2)

2402

-0.552

0.88

-0.42

0.00018

1.0

PASS

Mode
802.11b 802.11g 802.11n20 802.11n40

Frequency (MHz)

2.4G WI-FI Mode
Output power to Output power to Antenna antenna (dBm) antenna (mW) Gain (dBi)

Power Density at

Limit

R=20cm (mW/cm2) (mW/cm2)

Result

2462

14.799

30.19

0.75

0.00601

1.0

PASS

2462

13.882

24.45

0.75

0.00486

1.0

PASS

2437

13.612

22.97

0.75

0.00457

1.0

PASS

2452

13.465

22.21

0.75

0.00442

1.0

PASS

Remark: ANT1 & ANT2 can transmit atthe same time, So the worst simultaneous transmntting corsideration: The ratio = ANT1 MPE(MAX) / limit + ANT2 MPE(MAX) / limit = 0.00018 / 1.0 + 0.00601 / 1.0 = 0.00619 < 1.0.



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