RF exposure evaluation

FCC ID: QOQWT41U

RF Exposure Info

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FCCID_4341592

1 SAR Test Exclusion Threshold calculation Product: Bluetooth module Model name: WT41u FCC ID: QOQWT41U Portable use The calculation is done according to: KDB 447498 D01 General RF Exposure Guidance v06 Calculation formula according to KDB 447498 D01 Part 4.3.1a) (max π‘π‘œπ‘€π‘’π‘Ÿ π‘œπ‘“ π‘‘π‘Ÿπ‘Žπ‘›π‘ π‘šπ‘–π‘‘π‘‘π‘’π‘Ÿ [π‘šπ‘Š]) ÷ (π‘šπ‘–π‘›. 𝑑𝑒𝑠𝑑 π‘ π‘’π‘π‘Žπ‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘› π‘‘π‘–π‘ π‘‘π‘Žπ‘›π‘π‘’ [π‘šπ‘š]) × (√𝑇𝑋 π‘“π‘Ÿπ‘’π‘žπ‘’π‘’π‘›π‘π‘¦[𝐺𝐻𝑧] ≤ 3.0 Calculation: Max power1 Separation distance2 TX frequency3 Limit Result verdict [mW] [mm] [GHz] 80 42 2.48 2.9997 3.0 Requirement fullfilled 1maximum power of the transmitter according to calculation in the original equipment authorization (QOQWT41U) 2minimumseparation distance according to calculation in the original equipment authorization (QOQWT41U) 3maximum transmission frequency according to calculation in the original equipment authorization (QOQWT41U) Mobile use Calculation Formula 𝐸𝐼𝑅𝑃 𝑆 = 4πœ‹π‘…² EIRP = maximum conducted outputpower + antenna gain Limit for S < 1 mW/cm² Max power1 Max antenna gain2 Evaluation Result for S Limit verdict [mW] [dB] distance R [cm] [mW/cm²] [mW/cm²] 80 3.0 20 0.0317 1.0 Requirement fullfilled 1maximum power of the transmitter according to calculation in the original equipment authorization (QOQWT41U) 2maximum antenna gain of antenna WE-MCA (part No. 7488910245, manufactuerer Würth Elektronik)


Document Created: 2019-07-03 09:10:38
Document Modified: 2019-07-03 09:10:38
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