MPE Calculations

FCC ID: SWX-XR2

RF Exposure Info

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FCCID_760299

Ubiquiti Networks
XR2

MPE Calculation

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 @ 2400-2483.5 MHz; highest
conducted power = 29.90dBm (peak) therefore, Limit for Uncontrolled exposure: 1
mW/cm2 or 10 W/m2

EUT maximum antenna gain = 3 dBi.

Power Density Determination:

S = PG / 4πR2 or R = √(PG / 4πS)

where, S = Power Density (1 mW/cm2)
P = Linear Power Input to antenna (977.2)
G = Numerical Antenna Gain (2.0)
R = Radius (20cm)

S = (977.2*2.0/4π202) = (1954.2/5024) = 0.39 mW/cm2 @ 20cm

Document Created: 2006-12-07 16:06:57
Document Modified: 2006-12-07 16:06:57

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