A100 Ai Light RF Exposure Info RF exposure Shenzhen Ai-Thinker Technology co., LTD

Shenzhen Ai-Thinker Technology co., LTD Ai Light

Page 1 of A100 Ai Light RF Exposure Info RF exposure Shenzhen Ai-Thinker Technology co., LTD
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RF Exposure Report
FCC-ID: 2AHMR-A100
RF Exposure Measurement
The limit for Maximum Permissible Exposure (MPE) specified in FCC 1.1310 is followed. The gain of the antennas
used in the product is extracted from the Antenna data sheets provided and also the maximum total power input to
the antenna is measured. Through the Friis transmission formula and the maximum gain of the antenna, we can
calculate the distance, away from the product, where the limit of MPE is reached.
Although the Friis Transmission formula is far field assumption, the calculated result of that is an over-prediction for
near field power density. It is taken as worst case to specify the safety range.
RF Exposure Limit
According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environmental
impact of the human exposure to radio-frequency (RF) radiation as specified in 1.1307 (b)
Limits for Maximum Permissible Exposure (MPE)
F= Frequency in MHz
Frequency Range
Electric Field
Magnetic Field
(MHz)
Strength (V/m)
Strength (A/m)
Limits for Occupational / controlled Exposures
300 - 1500
--1500 – 100000
--Limits for General population / Uncontrolled Exposure
300 - 1500
--1500 – 100000
---
Power Density
(mW/cm²)
F/300
5.0
F/1500
1.0
Friss Formula
Friss Transmission Formula: Pd = (Pout * G) / (4*pi*r²)
Where
Pd = power density in mW/cm²
Pout = output power to antenna in mW
G = gain of antenna in linear scale
Pi = 3.1416
R = Distance between observation point and the center of radiator in cm
If we know the maximum gain of the antenna and the total output power to the antenna, through calculation, we will
know MPE value at distance 20cm.
EUT Operation condition
EUT was enabled to transmit and receive at lowest, middle and highest channels.
Classification
The antenna of this product, under normal use condition, is at least 20cm away from the body of the user. Warning
statement to the user for keeping at least 20cm or more separation distance from the antenna should be included in
the User manual. So, this device is classified as Mobile device.
Tune up
Mode
Detector
IEEE 802.11b
IEEE 802.11g
WIFI
Peak
15±1dBm
13±0.5dBm
IEEE 802.11n HT20
13±0.5dBm
ANT Gain (G) 2412-2462MHz: 2dBi (1.58)
Protocol
Channel
Frequency
(MHz)
Output Power
to Antenna
(dBm)
Output Power
to Antenna
(mW)
Power Density
(mW/cm²)
Limit
(mW/cm²)
IEEE 802.11 b
IEEE 802.11 g
IEEE 802.11 n20
2412-2462
2412-2462
2412-2462
16.0
13.5
13.5
39.81
22.39
22.39
0.0125
0.0070
0.0070
1.000
1.000
1.000
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Document ID3130468
Application ID8EsB0QdyZSaa9B7TmWwHmg==
Document DescriptionRF exposure
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize6.83kB (85347 bits)
Date Submitted2016-09-11 00:00:00
Date Available2016-09-11 00:00:00
Creation Date2016-09-05 07:09:34
Producing SoftwareMicrosoft® Office Word 2007
Document Lastmod2016-09-05 07:09:34
Document TitleRF exposure
Document CreatorMicrosoft® Office Word 2007
Document Author: Kfo

Source Exif Data [exif.tools]:
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Page Count                      : 2
Language                        : zh-CN
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Author                          : Kfo
Creator                         : Microsoft® Office Word 2007
Create Date                     : 2016:09:05 07:09:34
Modify Date                     : 2016:09:05 07:09:34
Producer                        : Microsoft® Office Word 2007