2.CDMA is known as a communication technology with low radiation and environmental protection, which has the characteristics of high spectrum utilization rate, good voice quality, strong confidentiality, low dropped call rate, small electromagnetic radiation, large capacity and wide coverage. Its radiation is lower than that of GSM.
3. Both WCDMA and TD-SCDMA are based on the perfection and development of CDMA technology, but the latter is independently developed in China, and I don't know much about the specific situation, but the radiation of WCDMA will definitely not be higher than the CDMA network standard.
4. The radiation amount of the mobile phone is the lowest when it is in standby, and slightly higher when it is connected and called.
The radiation of 5.3G mode is nearly 10 times lower than that of 2G.
6. The transmitting antennas of base stations are generally distributed in clover shape, and each leaf is responsible for the area of 120. However, due to the fan-shaped distribution of electromagnetic waves, the radiation intensity directly below the antenna is not very high.
7. Because the walls and floors of the house itself have a great attenuation effect on electromagnetic waves, when electromagnetic waves enter the room, the intensity will be attenuated to1/30 ~1100 only compared with the outdoor intensity.
8. Electromagnetic waves will also decay rapidly in the air, and the intensity of electromagnetic radiation is inversely proportional to the square of distance. In other words, as long as you keep a certain distance from the radiation source, you can obviously reduce its radiation. For example, when the distance increases by 10 times, the electromagnetic radiation is1100.
9. So as far as radiation is concerned, the 3G modes of major operators are relatively low, and WCDMA and CDMA2000 are the best.
Proper use of mobile phones can reduce radiation;
1. When using a mobile phone, stick it on your ear after switching on, because the radiation value of the mobile phone at the moment of switching on is three times that of a normal call.
2. When using the mobile phone, it should be 5 ~ 10 cm away from the ear and not close to the brain, so that the amount of electromagnetic radiation received by the human brain will be reduced.
3. Try to use headphones, or alternately answer the left and right ears to avoid electromagnetic radiation concentrated on one side of the brain. If you find a fever in your head or ears, stop talking immediately and massage back and forth with your palm to increase the blood flow and velocity of the damaged parts.
4. Avoid walking around the mobile phone for a long time, which will cause the intensity fluctuation of the received signal, thus causing unnecessary short-term high-power transmission.
5. Avoid using mobile phones in places with poor signals such as high-speed rail and elevators.