Call from the base station as far as possible physical injury? Answer-radiation experiments, the base station-IT information

Recently, there is a saying that goes, attracted the attention of many people, said distances itself from the base station cell phone, cell phone radiation generated by the larger, harmful to human health. Well, truth is what is it all about? We come to the China Research Institute of information and communications for answers. In the lab, we set up a mock ideal test environment, the work to a single mobile phone and base station for testing.

Farther away from the base station cell phone radiation will be big?

Phone connected, we measured mobile phone transmitter power is -53dbm. As an engineer on electromagnetic wave propagation loss increase of 10db, the distance between the handset and the base station is equivalent to an increase of 3.16 times times, mobile phone transmitter power is how much?

After measurement, mobile phone transmitter power is about -43dbm, an increase of 10db, then we continue increasing losses when losses increase the 20dB, distance has increased by 10 times times when phones transmit power for around -33dbm, increased by 20dB.

From the perspective of experimental, distances itself from the base station cell phone, mobile phone transmitter power, that is, radiation does more, why is that?

China Research Institute of information and communications environment and the Department of Homeland Security senior engineer Qi Dianyuan explains, this is like conversation between two people, farther away from it, you may need to increase your volume, voice must be a bit bigger.

Increase the amount of radiation on the human body harmful?

So mobile phones as far away from the base station and increase the amount of radiation as Internet users fear it, endangering people's physical health?

The international scientific community to quantify and measure the sole cell phone radiation is the specific absorption rate. Then, a cell phone at the maximum firing rate of specific absorption rate is how much? Staff will be an ordinary Smartphone debugging to the maximum transmit power and test.

China Research Institute of information and communications environment and the Department of Homeland Security senior engineer Qi Dianyuan, "we in accordance with the requirements of the national standard, let our mobile phone launched in the maximum power of a State, measured specific absorption rate values, so we can see the value of specific absorption rate is 0.118w/kg. ”

Local provisions of the exposure limit values of electromagnetic radiation of mobile phones in China, and specific absorption rate of up to 2W/kg, and our test results show that mobile phone tests at maximum transmitter power to specific absorption rate values is 0.118w/kg, only 5.9% of the national standards.

According to the World Health Organization over the past 20 years, conducted a lot of studies to assess the potential health risks of mobile phones report shows that, to date, has not yet confirmed that mobile phone use will cause any adverse health consequences.

News:

Base station is?

Base stations are low power antennas to communicate with users.

Then have radiation do we base station? Yes, but this radiation is electromagnetic radiation.

What do you mean electromagnetic radiation?

Electromagnetic field and electromagnetic radiation consists of both natural and artificial, and the earth itself is a large magnetic field. Natural electromagnetic radiation, without any harm to the human body. In other words, before the human electromagnetic equipment had not been invented, electromagnetic radiation in the universe exists a myriad of the world.

With the development of science, mankind has invented many facilities using electromagnetic energy, such as microwave ovens, television sets, they work with electromagnetic radiation, but as long as the radiation control values within a certain range, will not be harmful to our health. We can't hear as well as some animal communication with Infrasound, no impact on us.

Real damage of ionizing radiation to the body , if kids see this sign must get away.

打电话离基站越远越伤身体？实验给出答案 - 辐射,基站 - IT资讯

最近，网上有这样一种说法，引起了很多人的关注，说：离基站越远打手机，手机产生的辐射越大，有害人体健康。那么，真相究竟是怎样的呢？我们来到了中国信息通信研究院寻求答案。我们在实验室中搭建出了一个模拟理想状态的测试环境，即对单一手机和基站的工作状态进行测试。

离基站越远打手机辐射会大吗？

手机接通后，我们测量到的手机发射功率是-53dbm。当工程师对电磁波的传播损耗增大10db时，手机和基站之间的距离相当于增加了3.16倍，这时手机的发射功率会是多少呢？

经过测量，手机的发射功率为-43dbm左右，增加了10db，随后，我们继续增大损耗，当损耗增大20db时，距离相当于增加了10倍，这时手机的发射功率为-33dbm左右，增加了20db。

从实验看，离基站越远打手机，手机的发射功率，也就是辐射确实会越大，这是为什么呢？

中国信息通信研究院环境与安全部高级工程师齐殿元解释，这个就好像两个人之间对话一样，离得越远呢，你可能就需要提高你的这个音量，嗓门也必然要大一点。

增加的辐射量对人体有害吗？

那么手机因为离基站远而增加的辐射量会像网友担心的那样，危害人们的身体健康吗？

国际科学界用来量化和测量手机辐射的唯一标准是比吸收率。那么，一部手机在最大发射率下的比吸收率究竟是多少呢？工作人员将一部普通的智能手机调试到最大发射功率，并进行测试。

中国信息通信研究院环境与安全部高级工程师齐殿元，“我们按照国家标准的要求，让我们的手机在最大功率的一个状态下发射，测出来的比吸收率值，那么我们可以看到现在这个比吸收率值是0.118w/kg。”

我国《移动电话电磁辐射局部曝露限值》规定，比吸收率最高为2W/kg，而我们测试结果显示，手机在最大发射功率下测试到的比吸收率值是0.118w/kg，仅为国家标准的5.9%。

根据世界卫生组织在过去二十年中，进行的大量研究以评估移动电话是否有潜在健康风险的调查报告表明，迄今为止，尚未证实移动电话的使用会对健康造成任何不良后果。

新闻多一点：

基站是什么？

基站是与用户之间进行通信的低功率天线。

那么基站到底有没有辐射呢？有，但这种辐射属于电磁辐射。

电磁辐射是什么意思？

电磁场和电磁辐射分为天然和人工两种，而地球本身就是一个大磁场。天然电磁辐射，对人体没有任何危害。换句话来说，在人类还没有发明电磁设备之前，世界宇宙早就存在无数的电磁辐射了。

随着科学的发展，人类发明了许多利用电磁能工作的设施，如微波炉、电视机等，它们工作时都有电磁辐射，但只要辐射值控制在一定范围内，也不会对身体健康产生危害。就我们听不见像有些动物交流用的次声波一样，对我们没影响。

真正对身体有损害的是电离辐射，如果小伙伴们看到下面这个标志，一定要离得远远的。