How much influence does the communication base station have on people? Communication base station is the foundation of mobile communication. In the mobile communication system, the transmission and reception of space wireless signals depend on it. If you don't know how much influence communication base stations have on people, please read on.
How much influence does a communication base station have on people? The power of a typical base station is 40 watts. Xiaoming is away from such a base station 10 meter, and the base station is about 30 meters high. How much radiation does Xiaoming feel?
According to Pythagorean theorem, the distance from the top of the base station to Xiaoming is about 32 meters.
According to the formula, theoretically, the radiation amount radiated by the base station is 0.3 microwatts/cm2. However, the signal radiation intensity around the base station is not exactly the same.
In fact, the radiation intensity of the base station is 0.3-4.5 microwatts per square centimeter. Then the question is, will this intensity of radiation affect health? Let's look at the national standard of electromagnetic radiation:
The standard electromagnetic radiation standard in our country is ≤40 microwatts/cm2, which is the most stringent. The standard electromagnetic radiation standard in the United States and Japan is ≤600 MW/cm2, which is equivalent to 300 times the average radiation value of small mobile base stations. Is this liberation?
Why are there more and more base stations?
The coverage of each base station is limited, and the communication ability of each base station is also limited. In order to meet the communication needs of more users, it is necessary to focus on solving the problem of network communication capacity. In a certain area, the smaller and denser the cell, the greater the call capacity; In addition, the network coverage must reduce the communication blind area to meet the requirements of seamless network coverage, so it needs to be continuously expanded in stages.
How much radiation does the mobile phone we usually use have?
According to calculation, the radiation of mobile phones is usually only 1/80 of the national standard, that is, 0.5 microwatts per square centimeter. The better the signal, the lower the radiation of the mobile phone! In other words, a base station has been built near your home, so the cell phone signal is better and the cell phone radiation is much lower!
abstract
1. The farther away from the base station, the greater the radiation of the mobile phone.
A base station and a mobile phone are like two people talking on the phone. Radiation is like volume. The farther away, the more you should shout. The closer you get, the more you can whisper.
Therefore, the farther away the mobile phone is from the base station, the weaker the received signal from the base station, the stronger the electromagnetic wave the mobile phone needs to emit in order to keep communication with the base station, and the greater the radiation of the mobile phone.
2. The base station will not affect the health of nearby residents.
As long as the communication base station we are currently building meets the construction standards, it will not have harmful effects on human health; Moreover, the electromagnetic wave generated by the base station decays very fast in the air, once again, very fast! So, when it spreads to you and your family, it is almost negligible. If the base station construction meets the national safety standards, it will not affect the health of residents.
3. The radiation of base station is far less than that of mobile phone.
The radiation of communication base station is a kind of non-ionizing radiation, which will not destroy the molecular structure. This kind of radiation is the same as that produced by computers, refrigerators and televisions used in your home. There is no evidence that base station radiation will have a negative impact on human health, even less than that of household appliances.
How much influence does the communication base station have on people? Is there radiation in the base station?
The answer is: yes! In fact, everything in nature has radiation, from cosmic rays to granite floors, from electric lights and mobile phones to microwave ovens, high-voltage lines, even the water we drink, the air we breathe, and, yes, our own bodies. Moreover, the radiation of the base station is very small, which can be said to be completely insignificant in front of common household appliances such as computers, televisions, induction cookers and hair dryers, and will not cause harm to people.
Are there strict standards for base station construction?
The answer is: absolutely! In our country, the environmental impact of building base stations must be strictly controlled below the national standard of 40 microwatts per square centimeter, otherwise the permission of relevant departments cannot be obtained. Sang Zhenhua, the stationmaster of the radio monitoring station of Lijiang Municipal Committee of Industry and Information Technology, said that the measurement results of the base stations in our city are often far from the above standards. If you don't believe the standards formulated by China Environmental Protection Bureau, I can tell you that the standards of the United States, the European Union, Hongkong and other countries and regions are all 450 microwatts per square centimeter. It can be said that China's standards in this respect are much stricter than those in the world!
The base station built on the roof is not a threat to my home?
The answer is: the radiation directly below the base station is the smallest! This is because the antenna is directional, and the propagation signal is basically emitted in the horizontal direction, not in the vertical direction. Therefore, the building under the base station happens to be located in the blind area, and so is the so-called "black under the lamp". The same is true of the results measured by Tongcheng Jun with his staff.
The farther away from the base station, the less radiation?
The answer is: on the contrary! In fact, the closer to the base station, the less radiation. Maybe you can't understand it at once. Listen to the metaphor of Gao, general manager of Lijiang Tower Company. A base station and a mobile phone are like two people talking, and radiation is like volume. The farther away the phone is, the louder it will be. Similarly, the farther away the mobile phone is from the base station, the weaker the received base station signal, but it needs to emit stronger electromagnetic waves to keep the connection with the base station, so the radiation of the mobile phone will be greater.
The worse the signal coverage, the greater the radiation of the mobile phone. Therefore, Xi Zhang, deputy director of Lijiang Environmental Protection Bureau, suggested not to make phone calls when the cell phone signal is weak. Replacing a large base station with several small base stations is also to improve the signal quality and reduce the transmission power of mobile phones. Therefore, the signal coverage is perfect, the Internet access speed of mobile phones is faster, and users are less radiated by mobile phones.
How much influence does the communication base station have on people? 3. Will the base station cause harm to people?
Is base station radiation really that horrible?
Is there radiation in the base station? The answer is definitely yes, but the key question is, how strong is the radiation from the base station? Will it affect the health of the surrounding residents?
According to experts, the radiation produced by electromagnetic energy can be divided into ionizing radiation and non-ionizing radiation. The former refers to a kind of high-energy radiation, which can destroy physiological tissues and cause harm to human body, such as X-rays and nuclear radiation. The latter generally only has thermal effect and will not destroy the molecular bonds of organisms. At present, no research shows that it will cause harm to human body.
Base station radiation, like mobile phone radiation, belongs to non-ionizing radiation, that is, electromagnetic waves with a frequency of 0-300 GHz, which will not cause ionization of substances and generally will not destroy the molecular structure. In addition to these two, there are routers, televisions, induction cookers and so on. What we use in our daily life will also produce non-ionizing radiation.
In other words, base station radiation belongs to non-ionizing radiation, which will not actually cause harm to human health.
In fact, if we compare the radiation value of the base station with the more common routers and mobile phones, it is not difficult to find that the radiation value of the former is actually not worthy of attention.
According to the electromagnetic environment control limit standard currently implemented in China, the power density of communication frequency band should be less than 40 microwatts per square centimeter (μW/cm2), but the current base station is generally less than 8 μ w/cm2 because of signal superposition.
At present, the routers commonly used at home are generally around 17-25(μW/cm2) to 24-3 1 (μ w/cm2) when fully loaded. Compared with smart phones, iPhone standby is 17. 1(μW/cm2), Samsung standby is 25.4(μW/cm2), and so on.
By comparison, we can see that the radiation of mobile phones is higher than that of routers and far higher than that of base stations. Therefore, it is self-contradictory to keep your mobile phone at hand every day, but pay attention to the base stations far away from us.
Moreover, in actual construction, the base station is usually built in a relatively high place, far away from people, and the radiation intensity is inversely proportional to the square of the distance, that is, the higher the transmitting base station, the smaller the impact on the human body. Compared with the place where the distance is 10 meter, the radiation is reduced by 100 times.
So even near the base station, human radiation is very low. Moreover, the communication base stations in use and under construction must pass the electromagnetic environmental impact assessment of professional departments, and the base stations that meet the requirements of national standards have no potential harm to human health.
On the other hand, after the base station is dismantled, it seems that users will no longer be harmed by radiation, but the fact is just the opposite.
Because of the existence of the base station, the signal of the mobile phone becomes stronger. When the base station is dismantled, the signal strength will be reduced, which will force the mobile phone to increase the transmission power, and then increase the radiation, even not excluding the sudden increase of radiation from harmless to dangerous level. Therefore, when using a mobile phone, it is best to make a phone call in a place with strong signal, which not only ensures the call effect, but also helps to reduce the radiation of the mobile phone.
There is another situation that has to be mentioned, that is, "it is dark under the tower." Generally, the antenna height of the base station is 25-40 meters, and the electromagnetic wave attenuates quickly in the air, especially when it passes through the wall, especially after reinforcement, which is enough to ensure the safety of residents around the base station. At the same time, the electromagnetic wave of the base station is emitted in the horizontal direction, and the intensity in the vertical direction is almost zero, so the residents living downstairs of the base station are radiation dead ends.