By emitting electromagnetic waves, the interfered transmitter prevents another transmitter from receiving radio messages, or makes it difficult for the receiver to receive signals because the original radio waves are completely or partially superimposed in large amounts. Mobile jammers can work on the same or adjacent frequency as the receiving device that will be compromised, so field strength and modulation are important.
Jammers may be used for strategic reasons, but they may also be the result of unintentional interference due to equipment failure. Relatively weak transmitters may also be covered, so they will be interfered by Powerful transmitter signals on the same or adjacent frequencies. For example, this fact is used in the form of totalitarian government to prevent broadcast reception from unwanted parties (for example, foreign broadcasters).
cell phone jammer include any type of interference signals that are intentionally used to make it difficult or impossible for others to use the frequency. To this end, so-called jammers are used by emitting pulses or noise over a wide frequency band. The legal status in Germany stipulates that, for example, cell phone jammers may be purchased by individuals but not used. In some federal states, the judiciary uses such jammers to prevent prisoners from using cell phones without authorization. In France, the situation is different. There, jammers can be legally used in public venues, for example, to prevent disrupting cell phone operations in theaters or movie theaters.
Jammers have also been developed for general-purpose and unpopular "radar traps". Compared with pure radar detectors, this radar trap interferes with measurements that use high-frequency or laser radiation, thereby hindering measurement. Although these jammers are illegal in the country, they are relatively easy to obtain on the Internet. The last example is human interference to protect yourself: if you worry about your privacy being compromised by hidden bugs, but you can't find them, the interference will at least prevent these bugs from sending signals.
