RF Jammer
An RF jammer neutralizes a drone by overwhelming the radio-frequency link it depends on — transmitting stronger interference on the same frequencies the drone uses for command, control, video, or GNSS navigation until the legitimate signal can no longer get through. It's a non-kinetic method: the drone isn't destroyed, its ability to keep flying its mission is.
How it works
Most consumer and commercial drones operate their command-and-control and video links in the 2.4 GHz and 5.8 GHz bands, and many rely on GNSS (GPS, Galileo, GLONASS, BeiDou) for navigation. A jammer transmits high-power interference across the targeted band(s) — often several at once for broader effect — until the drone's receiver can no longer decode legitimate commands or satellite signals. What happens next depends on the platform: most drones execute a pre-programmed fail-safe, whether that's returning to launch, hovering in place, or landing immediately.
Why it's used
RF jamming is attractive precisely because it's non-kinetic — there's no projectile, no debris, no risk of a drone falling out of the sky and causing damage on the way down, which makes it viable in populated or urban settings where a kinetic intercept wouldn't be. It can also engage multiple drones inside its coverage footprint simultaneously, which matters against coordinated incursions.
Common types
Handheld jammers ("drone guns") — portable, rapidly deployed, common at events and checkpoints.
Fixed-site jammers — create a persistent protective zone around a facility, usually integrated with radar and RF detection.
Vehicle-mounted jammers — mobile protection for convoys and units in the field.
Omnidirectional — 360° coverage against threats from any direction.
Directional — focused energy toward a specific target, reducing the risk of unintended interference nearby.
Strengths and limits
The core advantages are the absence of physical destruction, the ability to hit multiple targets at once, and cost — a jammer engages repeatedly without expending munitions. The limits are mostly about what the target depends on: a drone flying pre-programmed autonomous waypoints may barely notice a broken control link, and fiber-optic-controlled drones — which never use RF at all — are essentially immune. Modern drones increasingly use frequency-hopping, encryption, and multi-band operation to resist jamming outright. There's also a real risk of collateral interference with nearby Wi-Fi, navigation, or friendly communications, which makes spectrum coordination a genuine operational requirement, and because jammers transmit, their location can in principle be found by an adversary's own signals-intelligence equipment.