RF Jamming

RF jamming attacks a radio receiver by raising the noise floor until the intended signal can no longer be decoded. Against drones, the targets are the command-and-control link from the operator and the satellite navigation signals the aircraft uses to know where it is. The two classic styles are barrage and reactive jamming. Barrage jamming floods entire frequency bands continuously — simple and effective, but power-hungry and indiscriminate, interfering with friendly radios on the same bands. Reactive jamming listens first, then transmits only when and where a target signal appears, saving power and reducing fratricide at the cost of more sophisticated equipment.

Effectiveness depends on geometry as much as power. What matters is the ratio of jammer signal to genuine signal at the victim receiver, so a modest jammer close to the drone can beat a powerful transmitter far away. Defenders exploit this with distributed jammers; drone designers respond with frequency hopping, directional antennas, and autonomous flight modes that need no link at all.

Jamming is the most widespread counter-drone technique in current conflicts precisely because it is cheap and non-kinetic. Its dominance is also why unjammable guidance — fiber-optic control cables, inertial navigation, terminal autonomy — has become the defining trend in strike drone design.