NovAtel - NoGAJT-AE-N

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The NovAtel - NoGAJT-AE-N specially designed for use in drones, provides the antenna electronics for a Controlled Reception Pattern Antenna (CRPA) in a rugged enclosure.

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GPS ant-jam technology antenna electronics for smaller platforms

JAMMING AND INTERFERENCE ARE HERE TO STAY 

Jamming and interference, whether intentional or unintentional, can seriously degrade GPS position, navigation and time availability even to the point of total solution denial. Jammers create excessive noise, overpowering the low power GPS signals and saturating the electronics in a GPS receiver front end. Methods are needed to suppress this interference so your GPS receiver continues to operate.

SMALL AND LIGHT ENCLOSURE

The GAJT-AE-N provides the antenna electronics for a Controlled Reception Pattern Antenna (CRPA) in a rugged enclosure.

WHO IS IT FOR?

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. Users can select from a variety of 4-element antenna array and cabling lengths to best meet the form factor requirements of their installation.

LEADING EDGE TECHNOLOGY

Interference mitigation is achieved by applying proprietary digital null forming algorithms to the signals, creating dynamic nulls to give protection against narrowband and broadband interference sources. Any 4-element CRPA can be used. We recommend antennas from Antcom Inc., either from their standard range or designed for custom form-factors. The unit comprises Radio Frequency (RF) front ends and null forming electronics. DC power is supplied via a dedicated LEMO connector. Integration to your GPS receiver is seamless.

HOW IT WORKS

GAJT mitigates interference by creating nulls in the antenna gain pattern in the direction of jammers, providing significant anti-jam protection even in dynamic multi‑jammer scenarios. The output of the GAJT-AE-N is a standard Radio Freqency (RF) feed, suitable for input to legacy GPS receivers.

BUILT FOR THE FUTURE

GAJT-AE-N comes in variants that protect either L1 and L2 or just L1 GPS signals in wide or narrow band. The wide bandwidth ensures future compatibility with M-Code GPS.

BENEFITS

  • Low cost anti-jam protection for small platforms
  • Easy to integrate
  • Anti-jam protection in dynamic multi-jammer scenarios
  • Compatible with legacy GPS receivers
  • Works with most 4-element antenna arrays (supplied separately)

FEATURES

  • Affordable protection for GPS position, velocity and time
  • Up to 40 dB of additional anti-jamming protection
  • Simultaneous GPS L1 and L2 or single frequency L1 protection
  • Adaptive digital nulling

PERFORMANCE

GNSS (GPS) Signals Center frequency

  • L1 1575.42 MHz 
  • L2 1227.6 MHz

INTERFERENCE REJECTION

  • Simultaneous L1 and L2 or single L1
  • Typical wideband suppression 40 dB
  • Number of simultaneous nulling directions 3

ANTENNA ARRAY OPTIONS

L1 and L2

  • 4 element Antcom 3.5 inch
  • 4 element Antcom 4.25 inch
  • 4 element Antcom 5 inch 

RF PORTS

  • RF inputs 4 x 50 Ohm SMA
  • RF outputs 1 x 50 Ohm SMA

POWER AND COMMUNICATION PORTS

  • 1 LEMO connector for DC power and RS‑232 for field loading

PHYSICAL AND ELECTRICAL

Power

  • Power consumption <30 W
  • Input voltage +10 to +28 VDC

GAJT-AE-N (Enclosure)

Dimensions

  • 170 × 150 × 40 mm

Weight

  • 1.2 kg

GAJT-AE (Card level)

Dimensions

  • 150 x 120 x 30 mm

Weight

  • 328 g

ENVIRONMENTAL

  • MIL-STD-810G

Temperature

  • Operating -40°C to +71°C
  • Storage -55°C to +85°C

Humidity

  • 95% non-condensing

Vibration

  • Random MIL-STD-202G
  • Sinusoidal ASAE EP455

Shock

  • MIL-STD-810G, 516.6

Enclosure

  • Immersion MIL-STD-810G, 512.5 
  • Blowing Rain MIL-STD-810G, 506.5 
  • Water Jets IEC 60529 IPX6

ACCESSORIES

  • Power and data cable

EXPORT APPROVALS

Canadian Controlled Goods

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NovAtel - NoGAJT-AE-N

NovAtel - NoGAJT-AE-N

The NovAtel - NoGAJT-AE-N specially designed for use in drones, provides the antenna electronics for a Controlled Reception Pattern Antenna (CRPA) in a rugged enclosure.

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