During the examination, the relevant departments will turn on the Signal Jammer at each examination site, which may affect the communication quality of mobile phone users around the school. The communication will not return to normal until the end of the examination. What is the effect of turning on the Signal Jammer during the exam?

To know what the role of interfering with mobile phone signals is, let's first understand the working principle of mobile communication. As a mobile communication device, mobile phones need to establish a connection with nearby base stations before accessing the core network to find the communication destination. In the above process, all information is carried and transmitted by electromagnetic waves. The electromagnetic wave band used by the mobile phone is related to the mobile phone model and the operator. If you want to interfere with the mobile phone signal in the examination room, it is impossible to make the base stations near the examination room inoperative, otherwise all communication devices in this area will not be able to communicate normally. But in general, the electromagnetic wave band used by operators is distributed in the range of 850mhz to 5800mhz, so it only needs to interfere with the signal of this frequency in the examination room to achieve the goal. At this point, only a small signal jammer can perfectly solve all mobile phone signals in the examination room.