Øhh trækker lige mine ord tilbage igen, fandt dette i et udenlandsk forum:
Some more information about cell phones.
Your GSM cell phone sends with a maximum power between 1 and 2 watts, depending on frequency. The Transmitter sends with a maximum power between 4 an 10 watts, depending on frequency. Normally (when within a good developed area), your cell phone uses only 0.3 watts to send its signals.
Many modern cell phone do not even reach these maximum outputs, as the manufacturers want to save energy. Less sendig power -> less energy consumtion -> longer operating time.
To make it easier to find a cell phone with little impact on you, you can look at its SAR-Value. It gives you a hint, how much energy is absorbed by your body. A SAR of 4 W/kg leads to an increase of 1°C in your body tissue.
The average Cell-Phone has a SAR of 0.9 W/kg.
In contrast to GSM and DECT, UMTS does not send pulsed signals on a single frequency, which are the main reason people are concerned about GSM and DECT technology, but a continuos signal spread over a frequency range of 5 MHz.
The maximum power of an UMTS Cell phone is 0.125 W.
The maximum power of an UMTS transmitter is 10W per Antenna.
As the UMTS antennas have an angle of reflected beam of about 130°, three antennas per transmitter are used. So the transmitter has a total maximum power of 30W. When in operation these 30W are rarely used.
Link til hele tråden:
http://www.bautforum.com/showthread.php?p=673048Det viser jo godt nok at en GSM sender med max 2 Watt, hvorimod en UMTS max sender med 0,125 W, altså noget af en foreskel, men det ser også ud til at SAR værdierne generelt ligger rimelig godt på de nyeste umts telefoner som f.eks Nokia 6280