RF Exposure Report (MPE)

FCC ID: N52-SDR-ICS-437FN

RF Exposure Info

Download: PDF
FCCID_4168806

RF Exposure Measurement 1. Introduction The maximum Gain measured in Fully Anechoic Chamber Because this deivce is transmitting the high power signal, it is regarded specially as a dangerous band for its heating harmfulness to the human body. The manufacturer whose product is working in this frequency band is obligatory to prove the harmfulness of his product. In this document, we try to prove the safety of radiation harmfulness to the human body for our product. The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The Gain of the antenna used in this product is measured in a Fully Anechoic Chamber (FAC), and the maximum total power input to the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can calculate the distance, away from the product, where the limit of MPE is reached. 2. RF Exposure Limit According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental impact of human exposure to radio-frequency(RF) radiation as specified in 1.1307(b). LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) - Class A Frequency Range Electric Field Strength Magnetic Field Power Density Average Time (MHz) (V/m) Strength(A/m) (mW/cm2) (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 LIMITS FOR MAXIMUM PERMISSIBLE EXPOSURE (MPE) - Class B Frequency Range Electric Field Strength Magnetic Field Power Density Average Time (V/m) 2 (MHz) Strength(A/m) (mW/cm ) (minutes) * 0.3 - 1.34 614 1.63 (100) 30 * 2 1.34 - 30 824/f 2.19/f (180/f ) 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 3. Friis Formula R= PG 4 S The maximum Gain measured in Fully Anechoic Chamber LTE : 50.118 (nemeric) Pout = output power to antenna in mW G = gain of antenna in linear scale Pi = 3.1416 MODE: LTE Page 1 of 2

4. Test Results The maximum Gain measured in Fully Anechoic Chamber Band dBi nemeric 758.00MHz ~ 768.00 MHz 17 dBi 50.118 (nemeric) /788.00MHz ~ 798.00 MHz 4.2 Output Power into Antenna & Power Density (0.509mW/cm2) : MODE: LTE Channel MAX Output Power Power Density Band Frequency to Antenna (mW) (mW/cm2) (MHz) 758.00MHz ~ 763.00 MHz 19769.696 197.13 768.00 MHz The Maximum antenna gain is 17dBi and the shortest distance from the human specific is 387.536 cm, the device is compliant with the requirement MPE limit for uncontrolled exposure. Page 2 of 2


Document Created: 2019-01-21 14:49:09
Document Modified: 2019-01-21 14:49:09
© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC