A radar jammer is a device designed to interfere with radar signals. It emits radio frequency signals that disrupt the radar's ability to detect and track objects, such as vehicles or aircraft. This technology is often used in military applications to protect assets from detection. In civilian contexts, radar jammers can be used to evade speed detection by law enforcement. However, the use of radar jammers is illegal in many regions, as it can hinder public safety efforts. Authorities often employ countermeasures to detect and neutralize these devices, ensuring that radar systems remain effective.