Estonian RF company Rantelon has launcher its fourth-generation portable counter-drone jammer, with battlefield-tested credentials across the Middle East and Ukraine.
As Estonia keeps building up its drone capacity, the necessity to shoot down potential uncrewed threats is also accelerating. And the local local DefenceTech scene is ready to offer solutions. This week, Tallinn-based electronics and defence company Rantelon has unveiled the PJ-4058, a fourth-generation portable drone jamming gun designed for law enforcement, border security and critical infrastructure protection. The device is the latest product from a company that has spent nearly three decades developing radio-frequency systems.
A key feature of the PJ-4058 is its ability to counter low-frequency FPV drones – the type that has seen rapid adoption on the battlefield in Ukraine. “The drone threat is evolving very quickly, and countermeasures must keep pace,” said Karl Taklaja, CEO of Rantelon. “In developing the new device, we focused on ensuring that it covers key frequency bands while remaining intuitive to use and reliable in the field.”
A vision of drone protection from Rantelon
The device has been developed alongside a broader project, backed by Enterprise Estonia, in which Rantelon is working with optical detection specialist Marduk Technologies and radio communications firm Sirius Microwave to build a next-generation integrated platform that combines drone detection and neutralisation in a single unit. The PJ-4058 sits within that wider effort to extend counter-drone coverage across all frequency bands used by drones while minimising interference to surrounding communications networks.
Technically, the PJ-4058 is built around a modular architecture that allows frequency modules to be swapped as the threat environment changes, avoiding the need to replace the entire device. It includes VSWR (voltage standing wave ratio) protection – a safeguard against antenna damage in field conditions – and is engineered to keep jamming signals within permitted frequency bands. Rantelon’s engineers have also developed “smart anti-drone” signal principles designed to reduce interference with adjacent radio communications.
Rantelon’s previous-generation counter-drone devices have been tested internationally and used in active conflict conditions in the Middle East and Ukraine.
Founded in 1995, the company develops and manufactures RF electronic devices and systems – spanning antennas, amplifiers, military equipment and electronic warfare systems – for both domestic and international markets.
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