Near the end of the period, many colleges and universities choose to use mobile phone signal jammers in the examination room to shield the signal in the examination room to prevent students from cheating in the exam. So when choosing to install a mobile phone signal jammer in the examination room, there are so many types, and the number of antennas is also different. Is the more antennas the better?
The effect of signal shielding in the examination room is related to the antenna carried.
First of all, it needs to be clear that the purpose of signal shielding in the examination room is to prevent candidates from cheating through wireless devices. If the wireless device carried by the candidate does not have an antenna, the effect of signal shielding will be better, because without an antenna, there is no ability to transmit and receive wireless signals.
However, if the wireless device carried by the candidate has an antenna, the effect of signal shielding will be affected. Because the antenna can enhance the transmission and reception of the signal, the candidate's wireless device may still be able to receive the signal even if it is within the range of signal shielding. In addition, antennas of different types and lengths will also affect the effect of signal shielding.
Depending on the model of the cell signal jammer in the examination room, the effect of signal shielding in the examination room is also different. The number of antennas is related to the loading of the shielding module. If you encounter an unnecessary shielding module, it is understandable to lack an antenna. For example: if there is no 5G signal in the base station near the installation site, the mobile phone signal jammer in the examination room naturally does not need to shield the 5G module, and it is just superfluous. But it is also said that the level of mobile phone signal jammers in the examination room depends on the number of antennas installed, more signal frequency bands are installed, and one more signal is shielded. In the past, 2G, 3G, and 4G signals were blocked, but now there are 5G signals, and we have entered another communication era. It is very embarrassing to use some mobile phone signal jammers in the examination room without 5G. It is okay to say that there is no 5G signal on site. If there is, it will lead to the phenomenon that the test room signal cannot be shielded. However, some frequency bands have relatively strong signals. One frequency band may require two to three modules to completely shield, which is also to fully ensure the effect of signal shielding in the examination room. It would be better to select the model of the test room signal jammer according to the signal of the measurement site environment.
Therefore, when implementing signal shielding in the examination room, it is necessary to comprehensively consider factors such as the type of wireless device and antenna carried, the coverage of the signal shielding device, and the power of the signal shielding device, so as to ensure that the wireless device of the examinee can be effectively shielded and prevent cheating. happened.