MPE - UNII 3

FCC ID: UIDDG1670

RF Exposure Info

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FCCID_2683320

§ 15.407(f) RF Exposure

RF Exposure Requirements: §1.1307(b)(1) and §1.1307(b)(2): Systems operating under the provisions of
this section shall be operated in a manner that ensures that the public is not
exposed to radio frequency energy levels in excess of the Commission’s
guidelines.

RF Radiation Exposure Limit: §1.1310: As specified in this section, the Maximum Permissible Exposure
(MPE) Limit shall be used to evaluate the environmental impact of human
exposure to radiofrequency (RF) radiation as specified in Sec. 1.1307(b), except
in the case of portable devices which shall be evaluated according to the
provisions of Sec. 2.1093 of this chapter.

MPE Limit Calculation: EUT’s operating frequencies @ 5745-5825 MHz; Limit for
Uncontrolled exposure: 1 mW/cm2 or 10 W/m2

Equation from page 18 of OET 65, Edition 97-01

S = PG / 4πR2 or R = √PG / 4πS

where, S = Power Density
P = Power Input to antenna =22.53 dBm = 179.06 mW
G = Antenna Gain 3 dBi (1.99 inear)
R = Minimum Distance between User and Antenna (20 cm)

S = (179.06*1.99)/(4*3.14*400 ) = 0.07 mW/cm2

Therefore the uncontrolled exposure limit is achieved at 20 cm.

Document Created: 2015-07-17 10:07:30
Document Modified: 2015-07-17 10:07:30

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