Sine wave is the limit of frequency measurement. Frequency per second is the time it takes the wave reaches the highest and lowest points. When encoding, the sound has been changed into a sine wave and the transmitter sends a signal to an antenna that sends signals out. The mobile phones have low-power transmitters. Most phones in the car has a powerful 3-watt transmitter. Cellular phones that we use to work at 0.75 to 1 watt of power. The position transmitter is located inside the mobile phone varies depending on the manufacture, but are usually located adjacent to the antenna.
Radio waves that send the signal encoding is the result of the spread of electromagnetic radiation by the antenna. The function of the antenna on most radio transmitter to send radio waves up into the sky. In the case of mobile phones, the wave is carried by a cellular phone transmitter on the tower.
The effects of mobile phone radiation:
• Cancer
• Brain tumors
• Alzheimer's
• Parkinson's
• Fatigue
• Dizziness
But there are ways to anticipate the mobile phone radiation:
• Use handsfree (headset)
• Use the phone antennae as far as possible with your ears
• Long antenna during use
• Limit the use of telephone inside the building
• Limit telephone usage in children
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