SAR values as a measure for RF exposure
Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency (RF) electromagnetic field. It is defined as the power absorbed per mass of tissue and has units of watts per kilogram (W/kg).
Quanta measures SAR in a modern set up
The official SAR measuring methods have been created in 1990s in a situation where the phone was used for phone calls and sending text messages, and where the phone was assumed to be in a distance of 15 mm (EU) from the head. However, this only applies to the past situation.
In a modern set up, most of the RF radiation exposure to the user is caused by the constant data traffic of the smart phones, as the phone is updating social media applications like e-mail. In those occasions the phone may be positioned in a close proximity to the body, e.g. in a pocket or a hand. For QUANTA algorithm the distance of < 10 mm was used for determining SAR. This gives SAR values that are more realistic to the situation prevailing today. For verification, measurements were also conducted at the distance of 15 mm, and official SAR limits were complied (SAR < 2 W/kg).
SAR limits are often exceeded in a modern set up
SAR-limits are exceeded when at the same time:
a) the mobile phone is in a close proximity to the body (e.g. phone is in a pocket)
b) the mobile phone sends a data package (uplink), taking place always in the end of receiving data
c) the network connection is weak causing higher transmit power
SAR limits are commonly exceeded in a daily use of smart phones. Cellraid laboratory and field tests have shown that the SAR-limits can be exceeded even six fold when the above mentioned three conditions are met simultaneously.
With QUANTA Guard the SAR limits will not be exceeded in any situation. The application automatically monitors RF emission conditions and when needed, cuts off receiving and sending data until a better network is available and the phone is further away from the body. Quanta Guard controls transmission in high exposure areas reducing users experienced emissions up to 90 %.