0057 Foldable wireless mouse RF Exposure Info RF Exposure evaluation NINGBO CSTAR IMP&EXP; CO., LTD

RF Exposure evaluation
According to 447498 D01 General RF Exposure Guidance v05
The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at
test separation distances≤ 50 mm are determined by:
[(max. power of channel, including tune-up tolerance, mW)/(min. test
separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for
10-g extremity SAR, where
f(GHz) is the RF channel transmit frequency in GHz
 Power and distance are rounded to the nearest mW and mm before
calculation
 The result is rounded to one decimal place for comparison
eirp = pt x gt = (EXd)2/30
where:
pt = transmitter output power in watts,
gt = numeric gain of the transmitting antenna (unitless),
E = electric field strength in V/m,
---
10((dBuV/m)/20)/106
d = measurement distance in meters (m)---3m
Sopt = (EXd)2/30 x gt
Ant gain=0dBi ;so Ant numeric gain=1
Field strength = 91.02 dBuV/m @3m
So Pt={ [10(91.02
/20)
/106
x3]2/30x1 }x1000 mW = 0.38 mW
So (0.38 mW/5mm)x √2.475GHz = 0.12 < 3
Then SAR evaluation is not required

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Document ID	4114000
Application ID	EdRN5kcnaD02sMutm2t9fQ==
Document Description	RF Exposure evaluation
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	RF Exposure Info
Display Format	Adobe Acrobat PDF - pdf
Filesize	5.54kB (69280 bits)
Date Submitted	2018-12-22 00:00:00
Date Available	2018-12-22 00:00:00
Creation Date	2018-12-21 15:06:15
Producing Software	Adobe PDF Library 15.0
Document Lastmod	2018-12-21 15:06:18
Document Title	RF Exposure evaluation
Document Creator	Acrobat PDFMaker 15 Word 版
Document Author:	Daria

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