RF EXPOSURE EVALUATION

zhaowen

18 L02 RFExp r1

Shenzhen Okexin Technology Co., Ltd. L021 2BFMQ-L021 2BFMQL021 l021

Shenzhen Okexin Technology Co., Ltd. L021 Projector 2BFMQ-L021 2BFMQL021 l021

PDF Viewing Options

Not Your Device? Search For Manuals or Datasheets below:


File Info : application/pdf, 2 Pages, 136.31KB

Document DEVICE REPORTGetApplicationAttachment.html?id=7388254
RF EXPOSURE EVALUATION

According to FCC 1.1310: 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)

FCC ID: 2BFMQ-L021

EUT Specification

EUT Frequency band (Operating)
Device category Exposure classification Antenna diversity
Max. output power Antenna gain (Max) Evaluation applied

Projector WLAN: 2.412GHz ~ 2.462GHz WLAN: 5.18GHz ~ 5.24GHz WLAN: 5.745GHz ~ 5.825GHz Others: 2.402GHz~2.480GHz (BDR&EDR) Portable (<20cm separation) Mobile (>20cm separation) Others ___ Occupational/Controlled exposure (S = 5mW/cm2) General Population/Uncontrolled exposure (S=1mW/cm2) Single antenna Multiple antennas Tx diversity Rx diversity Tx/Rx diversity
BDR&EDR: 5.73dBm (0.0037W) 2.4G WiFi: 18.88dBm (0.0773W) 5G WiFi: 15.96dBm (0.0394W) BDR&EDR: -0.58 dBi 2.4G WiFi: 4.14 dBi 5G WiFi: 2.33 dBi
MPE Evaluation SAR Evaluation

Limits for Maximum Permissible Exposure(MPE)

Frequency Electric Field Magnetic Field

Power

Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2)

(A) Limits for Occupational/Control Exposures

300-1500

--

--

F/300

1500-100000

--

--

5

(B) Limits for General Population/Uncontrol Exposures

300-1500

--

--

F/1500

1500-100000

--

--

1

Average Time
6 6
6 30

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 the limit of MPE, 1mW/cm2. If we know the maximum gain of the antenna and total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached.
Measurement Result

BT worst case:
Channel Measured Operating Frequency Power
Mode (MHz) (dBm)

Tune up tolerance
(dBm)

Max. Tune up Power
(dBm)

8DPSK 2402

5.73 5.73±1

6.73

Antenna Gain (dBi) -0.58

Power density

at 20cm

Power density

Limits (mW/cm2 )

(mW/ cm2 )

0.0008

1

2.4GHz WiFi worst case:

Channel Measured Operating Frequency Power
Mode (MHz) (dBm)

Tune up tolerance
(dBm)

Max. Tune up Power
(dBm)

802.11n (HT40)

2422

18.88 18.88±1 19.88

Antenna Gain (dBi)
4.14

Power density

at 20cm

Power density

Limits (mW/cm2 )

(mW/ cm2 )

0.0502

1

5G WiFi worst case:

Channel Measured Operating Frequency Power
Mode (MHz) (dBm)

Tune up tolerance
(dBm)

Max. Tune up Power
(dBm)

802.11ac (VHT40)

5230

15.96 15.96±1 16.96

Antenna Gain (dBi)
2.33

Power density

at 20cm

Power density

Limits (mW/cm2 )

(mW/ cm2 )

0.0169

1

Note: BT, 2.4G WiFi and 5G WiFi do not support simultaneous transmission. Test Result: Pass



Related FCC IDs:

Search Any Device: