ST730 SigFox IOT Device RF Exposure Info RF Exposure Suntech International Ltd.

Suntech International Ltd. SigFox IOT Device

FCC ID Filing: WA2-ST730
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Download: ST730 SigFox IOT Device RF Exposure Info RF Exposure Suntech International Ltd.
Document TypeRF Exposure Info
Document TitleMicrosoft Word - RF Exposure

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CTK Co., Ltd.
(Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea
Tel: +82-31-339-9970
Fax: +82-31-624-9501
www.e-ctk.com
RF EXPOSURE EVALUATION
Applicant
: Suntech International Ltd.
Applicant Address
: B-1506, Great Valley, 32, 9-Gil, Digital-Ro,
Geumcheon-Gu, Seoul, KOREA
Kind of Product
: SigFox IOT Device
FCC ID
: WA2-ST730
Certification
Number ISED
: 21484-ST730
Equipment
model name
: ST730
Antenna type
: PCB Antenna
Antenna Gain
: -0.01 dBi @900MHz, 2.84 dBi @2.4GHz
Page 1 of 3
CTK Co., Ltd.
(Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea
Tel: +82-31-339-9970
Fax: +82-31-624-9501
www.e-ctk.com
** MPE Calculations **
The EUT will only be used with a separation of 20 centimeters or greater between the antenna
and the body of the user. The MPE calculation for this exposure is shown below.
The peak radiated output power (EIRP) is calculated as follows:
EIRP = P + G
Where,
P = Power input to the antenna (mW)
G = Power gain of the antenna (dBi)
The numeric gain(G) of the antenna with a gain specified in dB is determined by:
G = Log-1 (dB antenna gain / 10)
Power density at the specific separation:
S = PG/(4R2π)
Where,
S = Maximum power density (mW/cm2)
P = Power input to the antenna (mW)
G = Numeric power gain of the antenna
R = Distance to the center of the radiation of the
antenna
(20cm = limit for MPE)
The Maximum permissible exposure (MPE) for the general population is 1 mW/cm2 .
The power density at 50cm does not exceed the 1 mW/cm2 limit.
Estimated safe separation:
R = √(PG / 4π)
Where,
P = Power input to the antenna (mW)
G = Numeric power gain of the antenna
R = Distance to the center of the radiation of the
antenna
(20cm = limit for MPE)
Page 2 of 3
CTK Co., Ltd.
(Ho-dong), 113, Yejik-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, Korea
Tel: +82-31-339-9970
Fax: +82-31-624-9501
www.e-ctk.com
900 MHz
Mode
P (dBm)
P (mW)
G (dBi)
S (mW/cm2)
R (cm)
FHSS
22.232
167.19
-0.01
0.0332
20
Mode
P (dBm)
P (mW)
G (dBi)
S (mW/cm2)
R (cm)
WLAN
9.70
9.33
2.84
0.0036
20
2.4 GHz
Multiple transmitters (900 MHz + 2.4 GHz)
Mode
EIRP
(dBm)
(mW)
(dBi)
(mW)
FHSS
22.232
167.19
-0.01
166.80
WLAN
9.70
9.33
2.84
17.95
Combined
184.75
(mW/cm )
(cm)
0.0368
20
Page 3 of 3
Download: ST730 SigFox IOT Device RF Exposure Info RF Exposure Suntech International Ltd.
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Document ID3552310
Application ID5oF4W3Vax7tvhr7bXhmz5w==
Document DescriptionRF Exposure
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeYes
Document TypeRF Exposure Info
Display FormatAdobe Acrobat PDF - pdf
Filesize5.49kB (68687 bits)
Date Submitted2017-09-08 00:00:00
Date Available2017-09-08 00:00:00
Creation Date2017-09-08 20:51:03
Producing SoftwareAcrobat Distiller 11.0 (Windows)
Document Lastmod2017-09-08 20:51:03
Document TitleRF Exposure
Document CreatorPScript5.dll Version 5.2.2
Document Author: hwj

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