Hexagon has introduced a new anti-jam antenna system designed to keep aircraft and other airborne platforms connected to satellite navigation even in hostile environments.
Satellite navigation is a critical part of modern aviation and defence systems. But these signals are being targeted by electronic warfare tools designed to disrupt them.
To address this growing threat, Hexagon’s new system, called GAJT-AE3, is designed to protect Global Navigation Satellite System (GNSS) signals from interference and intentional jamming. The compact antenna allows aircraft, drones, and missiles to maintain reliable navigation even when adversaries try to block satellite signals.
Modern military and civilian systems rely heavily on GNSS technology for positioning, navigation, and timing (PNT). Satellite networks such as GPS, GLONASS, Galileo, BeiDou, QZSS, and India’s NavIC provide the data that helps vehicles navigate accurately.
However, these satellite signals are extremely weak by the time they reach Earth. Even a small and inexpensive jammer can overpower them across a large area. This can disrupt navigation systems and deny access to accurate positioning information.
The GAJT-AE3 system is designed to solve this problem by filtering out interference while allowing genuine satellite signals to pass through.
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How the Hexagon New Antenna Works
The GAJT-AE3 uses advanced null-forming technology. This technique allows the antenna to detect the direction of jamming signals and suppress them while still receiving satellite signals.
The system can create up to seven interference suppression zones per frequency band. This means it can block multiple jammers simultaneously while maintaining a clear signal from satellites.
According to the company, the technology significantly improves navigation reliability in environments where electronic warfare is common.
Stig Pedersen, President of Aerospace and Defence at Hexagon, said the system was developed for modern combat platforms that have strict size and power limitations.
“This is a revolutionary expansion of our battle-proven anti-jam solutions designed specifically for space-constrained platforms,” Pedersen said.
“The GAJT-AE3 delivers unmatched signal coverage and multi-jammer direction finding for stronger protection and better situational awareness.”
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Compact Design for Modern Platforms
The GAJT-AE3 has been designed to fit easily into aircraft and unmanned systems with limited space and weight.
The antenna comes in two versions. The rail-mount model weighs about 714 grams, while the bolt-mount version weighs around 814 grams. The unit measures roughly 180 × 140 × 25 millimetres and requires about 30 watts of power.
It operates on a 16-36-volt direct current power supply, making it compatible with a wide range of airborne platforms.
The system supports signals from all major global navigation constellations. In addition to GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC, it also works with Iridium positioning, navigation, and timing signals and satellite-based correction systems.
This multi-constellation capability ensures that platforms can continue navigating even if signals from one system are disrupted.
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In recent years, signal jamming has become a common tactic in modern warfare. Electronic warfare systems are now capable of blocking navigation signals used by drones, missiles, and aircraft.
Earlier anti-jam technologies were large, expensive, and mostly used on high-value military assets such as strategic aircraft or naval ships.
Advances in size, weight, and power (SWaP) technology have now made these systems smaller and more affordable. This allows anti-jam protection to be installed on a wider range of platforms, including drones and unmanned systems.
With the launch of the GAJT-AE3, Hexagon aims to expand access to reliable anti-jamming solutions for modern airborne operations.
