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SAR Test

 

  Overview


    The SAR full name is the Specific Absorption Rate, which is the electromagnetic wave absorbed or consumed by human tissue per unit mass, in units of W/Kg or mw/g. It refers to the measurement of the energy absorption rate of a human body when it is exposed to a radio  frequency electromagnetic field. 
    The SAR test is mainly for wireless transmission products with antennas within 20cm of the human body, which are used to protect us from damage from wireless devices that exceed the RF transmission value. At the same time, not all products with wireless transmitting antennas within 20cm of the human body need to test SAR. Each country has another test method for products that meet the above conditions, but the power is very small, called MPE evaluation. We refer to the power between these two test standards as the exemption limit, and the exemption limits vary from country to country.

 SAR testing process and certification cycle


   The SAR test is mainly divided into three major blocks, the tissue validation-system validation-DUT test. Usually, the salesperson judges the test cycle according to the different products and frequency bands of the customer. In addition, there is a report cycle, a certification cycle, and a total time for the customer. The more the frequency band, the longer the cycle. Of course, this cycle is within the allowable range.

    The detection has two sets of SAR equipment, which can minimize the test period to meet the testing needs of more customers and emergency project requirements. In addition, the frequency covers 30MHz-6GHz, which covers almost all the equipment on the market, not because the range is too Small and can not be tested, especially the rapid popularization of 5G in the market WIFI products, as well as the testing of low frequency (136-174MHz) products, the testing can help customers solve the test and certification problems, and make the customers' products enter the foreign market smoothly.

The only VHF Band SAR test laboratory in Greater China

A few provide 5G Bands test labs



Standard and regulatory requirements


 Different products, different countries, SAR limits and test bands also require different

Table 1: Mobile phones

countryCEFCCICINDIAThailand
Measurement methodsEN50360
EN62209
EN62311
EN50566
ANSI C95.1
IEEE1528
47 CFR 2.1093
Reference KDB files、TCB files
IEEE 1528
RSS-102
EN62209
ANSI C95.1
IEEE1528
47 CFR 2.1093
Reference KDB files、TCB files
EN50360
EN62209
EN62311
EN50566
Limit2.0W/Kg1.6W/Kg1.6W/Kg1.6W/Kg2.0W/Kg
Average substance10g1g1g1g10g
Frequency band(MHz)GSM-900/1800
WCDMA-900/2100
CDMA-2000
GSM-835/1900
WCDMA-850/1900
CDMA-800
GSM-835/1900
WCDMA-850/1900
GSM-900/1800
WCDMA-2100
CDMA-2000
GSM-900/1800
WCDMA-850/2100


Table 2:push to talk

countryCEFCCIC
Measurement methodsEN50360
EN62209
EN62311
EN50566
ANSI C95.1
IEEE1528
Reference KDB files、TCB files
IEEE 1528
RSS-102
EN62209
Professional walkie-talkie limit10W/Kg(with 50% duty cycle)8W/Kg(with 50% duty cycle)8W/Kg(with 50% duty cycle)
Civil walkie-talkie limit2.0W/Kg(with 50% duty cycle)1.6W/Kg(with 50% duty cycle)1.6W/Kg(with 50% duty cycle)
Average substance10g1g1g
Frequency band(MHz)VHF (136-174)
UHF(400-470)
VHF (136-174)
UHF(400-470)
VHF (136-174)
UHF(400-470)


Table 3:PC

countryCEFCCICINDIAThailand
Measurement methodsEN50360
EN62209
EN62311
EN50566
ANSI C95.1
IEEE1528
Reference KDB files、TCB files
IEEE 1528
RSS-102
EN62209
ANSI C95.1
IEEE1528
Reference KDB files、TCB files
EN50360
EN62209
EN62311
EN50566
Limit2.0W/Kg1.6W/Kg1.6W/Kg1.6W/Kg2.0W/Kg
Average substance10g1g1g1g10g
Frequency band(MHz)BT
WIFI-2.4G
BT
WIFI-2.4G,5G
BT
WIFI-2.4G
BT
WIFI-2.4G
BT
WIFI-2.4G
Note :GSM,WCDMA,CDMA,S-TDMA部分与mobile phone 相同。


Product Range


Classified by product type, including mobile phones, walkie-talkies, tablets, laptops, USB dongle, etc.;

Classified by signal type, including GSM, WCDMA, CDMA, S-TDMA, 4G (LTE), DECT, BT, WIFI and other 2.4G products, 5G products, etc.;

According to the type of certification, including CE, IC, Thailand, India, etc., different countries have different requirements for SAR.



Laboratory style


  


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