Smart Phone-Radio Waves
Ariel and Sonia
radio frequencies that are used by mobile networks to communicate with phones. For example, T-Mobile USA uses 1900mhz ,while AT&T uses both 1900MHz and the newer 850MHz frequency band for its network.
- The amount of radio frequency energy a cell phone user is exposed to depends on the technology of the phone, the distance between the phone’s antenna and the user. The extent and type of use, and the user’s distance from cell phone towers.
A limited number of studies have shown some evidence of cell phone use and brain tumor risks. This means that even when you are talking on the smartphone the waves are being directed toward your head. The problem is that when this happens they are absorbed into the body's tissues, and this is why some studies have shown that this might lead to the risk of brain cancer.
The first smartphone combined the functions of a personal digital assistant. Later models added the functionally of media players , low-end compact digital cameras , pocket video cameras , and GPS navigation units to form one Multi-use device.
HOW DOES IT WORK?
Radio waves are vital for smartphone communication. Mobile phone send horizontal radio waves. The primary transmission direction may be compared with the light beam emanating from a lighthouse. The area just below the antenna will therefore receive very little radio waves. Also as the distance from the antenna increases, the strength of the radio waves decreases.
Mobile phones are low-powered radio frequency transmitters, operating at frequencies between 450 and 2700 MHz with peak powers in the range of 0.1 to 2 watts.