SAR - Specific Absorption Rate

Specific Absorption Rate (SAR) is measuring the amount of RF energy absorbed by human tissue from a radio transmitter. Radio devices incorporating  technologies such as GSM, UMTS, LTE, DECT, WLAN, Bluetooth®, PMR are used close to the human head or body. SAR measurements are the most important means of showing compliance to health requirements.

SAR measurements

The absorption of electromagnetic energy by the human muscle or brain tissue is simulated by measuring the electrical field inside a so-called SAM phantom filled with a liquid having the same electrical properties as human tissue at the different frequency bands, which are used by mobile communication systems. These liquids are prepared by CETECOM according to internationally standardized recipes. Measurements are defined for different head and body worn positions to simulate normal use of e.g. mobile phones.

Cetecom's scope of SAR measurements include:

• Regulatory SAR measurements for international market access
• Customized SAR testing following manufacturer specifications

HAC measurements

Apart from SAR measurements CETECOM’s DASY4 SAR test system is used for testing hearing aid compatibility (HAC) of mobile phones according to the American standard ANSI C63.19.