Drone mitigation – how it works and who may use it

RF jamming

A jammer floods the bands a drone uses with enough radio noise at the drone's receiver that it can no longer pick out the pilot's commands or its own positioning signals.

Whether it works depends on how much stronger the jamming signal is than the wanted signal at the drone (the jamming-to-signal ratio). That is why the same device is effective at one distance when the pilot is close to the drone and another when the pilot is far away – any vendor range figure rests on assumptions.

What does the drone do? On losing the link, it enters the failsafe mode set in its firmware: hover, land, or try to return to the take-off point. If satellite positioning is also lost, return-to-home fails too; the drone typically hovers or lands and may drift with the wind. Jamming the video link "blinds" an FPV pilot.

Bands typically jammed:

• 2.4 and 5.8 GHz control and video bands,
• GNSS bands (GPS, Galileo, GLONASS, BeiDou),
• additional FPV bands – wideband units cover roughly 840–5850 MHz,
• 2G–5G mobile bands for cellular-connected drones.

Directional vs. omnidirectional. A directional antenna – typically a 15–25° beam – concentrates power in a narrow sector: more range, less collateral interference, but it has to be aimed. An omnidirectional unit protects a "dome" around a site, at the cost of interfering with everything nearby.

Form factors and typical figures. From rifle-style handheld units (from about 1.5 kg) through backpack and vehicle-mounted versions to fixed installations (30 kg and up). A 70–110 W total output class is common; for directional units vendors typically quote 500–1500 m – under ideal conditions.

Why it is so tightly regulated

Jamming doesn't discriminate. Jamming 2.4 and 5.8 GHz takes down surrounding Wi-Fi; GNSS jamming affects navigation, aviation and anything that depends on precise timing; jamming mobile bands can block emergency calls. That is why civilian sale and use of such devices is not permitted in the EU and their use is reserved for authorised bodies. Legal framework

Limits of jamming

• Jamming the control link alone doesn't stop pre-programmed flight; GNSS jamming makes it harder, but not necessarily for drones using inertial or visual navigation.
• It has no effect on fibre-optic-controlled drones.
• Behaviour depends on firmware: there is no guarantee the drone lands, or that it lands somewhere safe.
• A falling or drifting drone is itself a hazard – especially over a crowd.

Other mitigation methods

• Protocol-based takeover (cyber) – the system takes control through the drone's own communication protocol and lands it in a designated spot. Works only with known protocols, but has fewer side effects and brings the drone down in a controlled way.
• GNSS spoofing – false positioning signals divert the drone. Strictly regulated, high collateral risk.
• Physical capture – net launchers, interceptor drones. Controlled capture, but short range and skilled operators required.
• Military systems – directed energy and kinetic effectors, military use only.

What this means in practice

For event organisers, security companies and facility operators, mitigation isn't about owning a device but about cooperation: fast detection, accurate information, immediate notification and a procedure agreed with the authorities in advance. For authorities, we provide independent technical advice on evaluating equipment. → Authorities