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When a person makes a cell phone call, a signal is sent from the phone’s antenna to the nearest base station antenna.
The base station responds to this signal by assigning it an available radiofrequency channel.
Base station antennas use higher power levels than other types of land-mobile antennas, but much lower levels than those from radio and television broadcast stations.
The amount of energy decreases rapidly as the distance from the antenna increases.
RF waves transfer the voice information to the base station.
The voice signals are then sent to a switching center, which transfers the call to its destination.
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Cellular (cell) phones first became widely available in the United States in the 1990s, but since then their use has increased dramatically.
Classical, Soundtrack, and Psychedelic Rock - THE TRIFECTA!Cell phone base stations may be free-standing towers or mounted on existing structures, such as trees, water tanks, or tall buildings.The antennas need to be high enough to adequately cover the area. Cell phones communicate with nearby cell towers mainly through radiofrequency (RF) waves, a form of energy in the electromagnetic spectrum between FM radio waves and microwaves.At very high levels, RF waves can heat up body tissues.(This is the basis for how microwave ovens work.) But the levels of energy used by cell phones and towers are much lower.