colocated MPE Calculation

FCC ID: UDX-62009015

RF Exposure Info

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FCCID_1097385

RF Exposure: MPE Calculation Product: 802.11n 2x2 MIMO mini PCI module Applicant: Meraki Networks FCC ID: UDX-62009015 The referenced RF module will not be sold to the general public, rather, Meraki will use the module in its access point products, which will use external mount antennas. Meraki controls the design, manufacture, and distribution of its AP products. The MPE calculations below show worst case MPE for each antenna at each band. Meraki plans to produce an AP that will incorporate 3 of the referenced radio modules. Worst case from an RF exposure situation, the radio modules can operate simultaneously at 2.4 GHz, 5.1 GHz, and 5.8 GHz. In at least one anticipated configuration, antenna separation will be less than 20 cm, when monopole antennas are used for all three radios. All other antenna mountings will result in separations greater than 20 cm. For transmissions with co-located antennas less than 20cm apart, the three sets of 2x2 antennas can be considered as a point source, and the three RF power densities at 20 cm are then summed and compared to the limit. Data shows the total exposure from the three radios operating with co-located monopole antennas is 0.17 mW/cm2, below the 1.0 mW/cm2 limit in the Rules for a mobile device. Meraki Backbone FCC ID: UDX-62009015 802.11n AP Calculate mW/cm2 here. Enter frequency in MHz: RF Hazard Distance Calculation Calculation of Limits from 1.1310 Table 1 Controlled Uncontrolled Ave 6 min Ave 30 min mW/cm2 from Table1: 1.00 F(MHz) Actual F, MHz Occ, mW/c2 Gen, mW/cm2 0.3-3 0.5 100.0 100.0 Max RF PoweTX Antenna MPE distance S, mW/cm@ Comment 3.0 - 30.0 5 180.0 36.0 P, dBm G, dBi cm at 20 cm 30.0-300 55 1.0 0.2 300-1500 902 3.0 0.60 21.87 3.00 4.9 0.06 2.4 GHz dual mono 1500-100000 5555 5.0 1.0 21.87 2.5 4.7 0.05 2.4 GHz dual band mono 21.87 11.5 13.1 0.43 2.4 GHz H/V dual pol 17.00 19.0 17.8 0.79 2.4 GHz panel Enter P(mW) Equivalent dBmEnter dBm Equivalent Watts 21.17 4.0 5.1 0.07 5.8GHz mono 21.17 5.0 5.7 0.08 5.8GHz dual band mono 21.17 14.5 17.1 0.73 5GHz H/V dual pol 21.17 5.0 5.7 0.08 5.8GHz dual band mono 16.60 5.0 3.4 0.03 5.15 GHz dual band mono 21.87 3.0 4.9 0.06 2.4GHz mono 0.17 Worst case co located Basis of Calculations: 1000 30.00 30.00 1000.0 E^2/3770 = S, mW/cm2 E, V/m = (Pwatts*Ggain*30)^.5/d, meters d = ((Pwatts*G*30)/3770*S))^0.5 Pwatts*Ggain = 10^(PdBm-30+GdBi)/10) S@20cm = 20 log (MPE dist/20cm) NOTE: For mobile or fixed location transmitters, minimum separation distance is for FCC compliance is 20 cm, even if calculations indicate MPE distance is less


Document Created: 2009-04-15 16:06:35
Document Modified: 2009-04-15 16:06:35
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