GAJT®-710MS Anti-Jam Antenna
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.
Until now, the high cost and large size of Controlled Reception Pattern Antennas (CRPAs) has limited their use to the largest capital ships while other vessels in the fleet were left vulnerable to GPS interference. The GAJT-710MS from NovAtel combines a CRPA and null forming electronics into a marine hardened enclosure that is suitable for installation on a wide range of marine vessels, from small patrol boats to large carriers.
Patented, Leading Edge Technology
The system uses NovAtel’s patented seven-element Pinwheel® CRPA to receive GPS signals in the L1 and L2 bands. Interference mitigation is achieved by applying proprietary digital beamforming algorithms to the signals, creating dynamic nulls to give protection against narrowband and broadband interference sources. 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-710MS is a standard Radio Freqency (RF) feed, suitable for input to legacy GPS receivers.
Built For the Future
GAJT protects L1 and L2 GPS signals. The wide bandwidth of the GAJT-710MS ensures future compatibility with M-Code GPS.
Features & Benefits
■ Affordable protection for GPS position, velocity and time
■ Up to 40 dB of additional anti-jamming protection
■ Single enclosure system
■ Simultaneous GPS L1 and L2 protection
■ Adaptive digital nulling
■ Low cost anti-jam protection for ships and boats
■ Easy to integrate, ideal for retrofitting
■ Anti-jam protection in dynamic multi-jammer scenarios
■ Compatible with legacy GPS receivers
■ Low Cost, Small Form Factor