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GPS technology has revolutionised modern warfare. Military organisations regularly depend on satellite technology for accurate positioning, timing and communications.


The GAJT-410ML is the next evolution of NovAtel’s battle-proven anti-jam technology. It maintains the high levels of interference rejection performance as in the larger GAJT-710ML system, but in a lower size, weight and power (SWaP) design.


The GAJT-410MS anti-jam antenna for marine is built with marine-hardened enclosure enabling assured PNT for continuous operations, cybersecurity and safe navigation at sea.


GAJT (pronounced “Gadget”) is the first single unit GPS anti-jam antenna appropriate for use with military land vehicles, networks and timing infrastructure. GAJT nullifies jammers, ensuring satellite signals necessary to compute position and time are always available.


Jamming and interference, whether intentional or unintentional, can seriously degrade GPS position, navigation and time availability – even to the point of total solution denial. The GAJT-710MS is suitable for maritime operations. GAJT nullifies jammers, ensuring satellite signals necessary to compute position and time are always available.


The GAJT-AE-N® variant provides the antenna electronics for a Controlled Reception Pattern Antenna (CRPA) in a custom enclosure system. GAJT-AE-N is designed for size and weight constrained applications such as small airborne and ground unmanned platforms, where it is preferable to mount the antenna electronics inside the vehicle.


NovAtel Defence Brochure

GPS receiver technology relies on signals broadcast from satellites orbiting 20,000 km above the earth at approximately -163 dBW or about the strength of a single Christmas tree bulb. The low power of this transmission makes the signals vulnerable to being swamped by interfering signals from both malicious and non-malicious sources.

A simple 1 watt jammer, readily available on the Internet, can overpower GPS signals within a large area, denying a position solution from the victim receiver.

GPS anti-jam technology is quickly evolving. Until recently, size and cost considerations meant anti-jam systems were only feasible for extremely expensive assets, such as airplanes, helicopters and aircraft carriers. NovAtel’s compact and affordable GAJT® anti-jam antenna:


  • Nullifies jammers, ensuring the satellite signals required to compute precise position will always be available
  • Provides anti-jam performance comparable to large, multi-component Controlled Reception Pattern Antenna (CRPA) systems at a significantly lower cost
  • Integrates easily into new military vehicle platforms or can be retrofitted with GPS receivers and vehicle navigation systems on existing and legacy fleets
  • Is a commercial off-the-shelf product, so it can be deployed quickly for urgent operational requirements.