A Ukrainian firm is testing a jammer light enough to ride on a heavy bomber drone and shield it from the enemy FPVs that hunt it. Aura-Ukraine has begun final tests of the system, called Aura 3K mini, the Dignitas Fund, a charity developing it with the manufacturer, Oboronka reports.

The bombers it is built to protect have become some of Ukraine's most valued drones. In the Donetsk operation last month, heavy bombers dropped kamikaze ground robots more than 10 kilometers behind Russian lines. The same weapon has been fitted with guided bombs that strike at long range with high precision.

At the same time, heavy bombers are large, making them prime targets for Russia. Keeping them in the air, and out of enemy hands, is the point of the new shield.

Two jammers cover 360 degrees

Aura 3K mini wraps the drone in a spherical, 360-degree cover using two broadband jammers, the fund says. Two emitters, not one, close the blind angles a single jammer would leave.

They work across the 2.1 to 2.8 GHz band, enough to disrupt FPV drones without cutting the bomber's own Starlink link. The whole device weighs about 2.4 kilograms.

"Radiation-pattern tests start on the front line in the coming days," the fund's press service says, and if they succeed, the system is set for serial production.

The fund moves to automate it

The next step is to make the jammer smarter, the fund says. It wants an auto-on function that fires only when a threat is detected, so the bomber does not give away its position with constant emission.

The team also plans to adapt Aura 3K mini to Vampire-type bombers, the heavy night drones that Russian troops nickname "Baba Yaga". That would widen the shield's reach across more of Ukraine's bomber fleet.

Russia hunts the Baba Yaga

The nickname points to a fairytale Slavic witch who flies by night. The real thing has been hard for Russia to counter: in 2024, a Ukrainian night bomber was often impossible to jam and, by one account, could be destroyed only with a flamethrower. By 2025, Russia was offering its soldiers 10 days' leave for capturing a Baba Yaga it could not build itself.

A few hidden transmitters may be sitting somewhere in Kyiv, switching on just long enough to steer Russian drones onto their targets. Presidential adviser Serhii Beskrestnov, known as Flash, says one to three concealed enemy repeaters may be operating in the capital, giving Russia a brief online channel to guide jet-powered Gerans onto precise targets.

He calls the devices MESH repeaters, compact modems that relay a short control signal to a Geran at the moment of attack, a channel Ukraine has been testing electronic warfare against for months. As long as they operate, he warns, sealing the city with jammers will not work.

Flash makes the case

"I now insist that the enemy's MESH radio repeaters are being switched on in Kyiv, providing a temporary, short-term control channel for jet-powered Gerans to adjust strikes," Flash says.

He keeps the number low: "Maybe 1 to 3. Such repeaters are hard to find, but we have to search." As evidence, he points to the guided strike on the headquarters of Ukraine's Security Service. A Russian agent, he said then, likely switched on a MESH relay within five kilometers of the target for the length of the attack.

The wreckage shows no other hidden link, he adds: "No LTE, no Rassvet, no alien quantum modems."

Jamming alone won't shield Kyiv

The stakes, in his telling, run past the bridges.

"As long as online control of the drones exists, not only the bridges but the air-defense assets on them will be under threat," Flash explains, noting that a Gepard anti-aircraft gun on a bridge crossed by tens of thousands a day cannot be hidden.

Without a stable channel right up to the impact point, he argues, a drone cannot strike a bridge pier or cable precisely. He leaves room for doubt, ending, "Let me be wrong about the repeaters." Yet in the whole war, he adds, he has "never once been wrong" in his technical reads of the enemy.