In the recent news pictures about our army's peacekeeping troops, we can often see a very strange device, which is installed on the back of the Mengshigao motor vehicle and the 92-type armored vehicle. The biggest feature is that there are many cylindrical antennas. And generally, there is always one or two vehicles equipped with the device walking in the front or the back of a peacekeeping force convoy. So what is this thing? In fact, the official name of this device is called frequency jammer. Its function and principle are somewhat similar to the Cell Phone Blocker Diy Kit commonly used in our college English test room for CET 4 and 6. However, the power of the peacekeeping force is higher, the shielding range is wider, and the means of shielding And more, and it's not against cheaters, but remote-controlled roadside bombs that militants may plant, or IEDs, as TV news often calls them. At present, the frequency cell phone jammer equipment of various countries to deal with IED mainly uses two interference methods to block wireless remote control signals. Then, an interference signal is added to the receiving and transmitting carrier of the suspicious signal, so as to increase the bit error rate of the IED communication equipment, so that it cannot send precise instructions. The advantage of this targeted jamming is that it will not affect the communication equipment of the enemy while blocking the communication of the enemy.
The communication equipment of many IEDs is very simple and does not require any precise instructions, only a simple electrical signal, so to deal with this type of IEDs, only blocking interference can be used. This interference mode is a bit rougher than the aiming type. Its interference principle is very simple. It relies on its own high-power interference signal to drown out all radio signals within a certain frequency range, so as to make the IED remote control communication equipment unable to To complete the contact, of course, the disadvantage of this interference method is also obvious, that is, the own communication equipment within the interference range is also useless. At present, domestic manufacturers have carried out in-depth research on this aspect, and the results are also very rich. In recent years, many defense exhibitions can also be seen in various local defense exhibitions. There are both portable and vehicle-mounted high-power products. Their interference frequency range is generally around 20M Hz to 3600M Hz, which basically covers all common wireless communication devices from remote control toys to mobile phones. The power of the vehicle is generally more than 1000 watts, so the effective protection range is relatively large, and These Cell Phone Blocker Diy Kit also use multi-module multi-band interference to complete frequency coverage. This design allows users to flexibly reduce or expand the frequency shielding range according to their needs, and it is also very convenient for users to Create a communication "corridor" that can only be used by oneself in the shielded frequency range.