GNSS Anti-Jam Technology
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Roke has launched Nav-Sync Armour, a Controlled Reception Pattern Antenna system designed to redefine access to resilient navigation across globally contested environments.
Global Navigation Satellite System signals are inherently weak by the time they reach Earth, making them vulnerable to low-cost, ground-based interference that degrades or denies navigation. In modern operations, this disruption has become a routine feature, regularly impacting ships, aircraft, and critical national infrastructure across Ukraine, the Baltics, and the Middle East where jammers transmit electromagnetic noise to overwhelm legitimate satellite signals.
The newly introduced Nav-Sync Armour system counters this threat to support the growth of autonomous air, maritime, and ground platforms. As a multi-element Controlled Reception Pattern Antenna, the system uses multiple receiver channels and advanced digital processing to actively protect satellite signals in contested environments. Unlike conventional antennas that receive signals uniformly from all directions, it distinguishes between genuine satellite signals and interference, suppressing jamming sources in real time while maintaining a stable and trusted output across L1 or L2 frequencies.
Marc Overton, Managing Director of Roke, stated: “CRPAs have long been the gold standard for resilient navigation, but not always a cost-effective offering for some platforms. As a result, a large proportion of assets have been left either exposed to attack or reliant on solutions that struggle to perform in contested environments.”
“For decades, effective GNSS protection has been concentrated on high-cost platforms, with many systems operating without meaningful resilience. Nav-Sync Armour addresses that imbalance by delivering the performance of high-end CRPA systems in a compact, low-SWaP solution that is affordable for all platforms,” Overton added.
The system is engineered for rapid integration as a direct replacement for existing antennas, connecting directly to existing receivers via standard RF interfaces without requiring significant platform redesign. Its compact form factor, low power consumption, and UK sovereign design ensure freedom from ITAR constraints, reducing supply chain friction and enabling broader adoption. Roke has worked alongside other UK partners to create an onshore supply chain capable of manufacturing the units in the thousands.
This solution builds on a four-decade heritage in antenna technology, following Roke’s development of the world’s first anti-jam system in 1984. The technology forms part of a wider Resilient Positioning, Navigation, and Timing portfolio, reflecting a broader defense capability shift from the selective protection of high-value assets to scalable protection across the force.
