MPE

FCC ID: 2APN54CHR3

RF Exposure Info

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FCCID_4382459

$FCC ID : 2APN54CHR3 RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency(RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency Electric Field Magnetic Field Power Average Time Range(MHz) Strength(V/m) Strength(A/m) Density(mW/cm2) (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R2) Where Pd= Power density in mW/cm2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in 20cm Pd the limit of MPE, 1mW/cm2. If we know the maximum gain of the nd total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. 11.2 Measurement Result WIFI 2.4G: conducted Max Channel power Antenna Evaluation Power density conducted power tune-up Freq. modulation (dBm) Tune-up power (dBm) Gain result Limits (mW) power (MHz) Numeric (mW/cm2 ) (mW/cm2 ) (dBm) 2.412 11b 19.36 12.87 11dBm to 13dBm 13 1.33 0.00528 <1 2.437 11b 17.54 12.44 11dBm to 13dBm 13 1.33 0.00528 <1 2.462 11b 14.19 11.52 11dBm to 13dBm 13 1.33 0.00528 <1 2.412 11g 35.65 15.52 15dBm to 17dBm 17 1.33 0.01326 <1 2.437 11g 43.55 16.39 15dBm to 17dBm 17 1.33 0.01326 <1 2.462 11g 25.47 14.06 13dBm to 15dBm 15 1.33 0.00837 <1 2.412 11n HT20 33.65 15.27 15dBm to 17dBm 17 1.33 0.01326 <1 2.437 11n HT20 37.15 15.70 15dBm to 17dBm 17 1.33 0.01326 <1 2.462 11n HT20 21.93 13.41 13dBm to 15dBm 15 1.33 0.00837 <1$

Document Created: 2019-07-29 14:49:51
Document Modified: 2019-07-29 14:49:51