With the continuous progress of modern science and technology, smart phones have brought convenience to people's lives. At the same time, there are many illegal acts using mobile phones. For example, in the past, cheating in exams relied on taking notes, making small copies and stealing notes. Now all the answers come out just by surfing Baidu, so we need an electronic jammer that can shield mobile phone signals to prevent them from using electronic devices to cheat in the exam. With the coming high school entrance examination and college entrance examination, many schools are now trying to avoid cheating in the examination room. In response to this phenomenon, electronic jammers have emerged. Electronic jammers are a good helper to effectively eliminate and prevent cheating.

The advantages of using the electronic jammer are mainly shown in: ① It is not very large, and can be conveniently placed in any position in the examination room. It does not need to be designed separately and does not have any noise when running. The use of the electronic jammer will not have a great impact on the examinees; ② Don't worry about its impact on other electronic devices. The electronic jammer mainly shields mobile phone signals. At the same time, it cuts off the connection between the mobile phone and the base station and will not cause harm to the human body. ③ The electronic jammer can cover a large area, reducing the number of shields purchased, and greatly saving the cost.