China's communication base station standards strictly meet the requirements of national standards, with electric field intensity far less than 12 V/m and power density far less than 40 MW/cm2. In the mobile communication frequency band (800MHz-2 100MHz), China's electromagnetic radiation standard is stricter than the recommended standard of international non-ionizing radiation standard 1 1.25-26.26.
The intensity of electromagnetic radiation is inversely proportional to the square of distance. Compared with the distance of 10 meter, the intensity of electromagnetic radiation is reduced by 100 times. In addition, if electromagnetic radiation passes through walls and other objects, the radiation intensity will also drop sharply.
Characteristics of mobile base stations
(1) AC power supply is complicated. Some are three-phase power supply, some are single-phase power supply, and some are national power line transmission, but there are also problems such as high voltage transmission to special transformers, transformer capacity, low voltage side line distance, etc. Others can be directly connected in parallel to the rural power grid, residential power lines or factory and mine production power lines; This may lead to poor power supply quality, such as large voltage fluctuation range, frequent voltage mutation and frequent power failure.
(2) There are many base stations, which are widely distributed and have great differences in site environments. In order to cover the network, a large number of base stations have to be built in barren hills, commanding heights of houses and high temperature and humidity areas. It not only makes AC power supply difficult, but also increases the probability of lightning strike, reduces the stability and life of equipment operation and increases the failure rate due to high temperature and high humidity.
(3) unattended. Once problems occur, not only the direct cost of manual intervention in maintenance and restoration is high, but also the customer impact and indirect losses caused by failure to find them in time are great.
The above contents refer to People's Daily Online-tell you the truth about the electromagnetic radiation of the base station.