Defense GAJT-710ML
™
SINGLE-ENCLOSURE GPS ANTI-JAM
TECHNOLOGY (GAJT
®
)
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.
LOW COST, SMALL FORM FACTOR
Until now, the high cost and large size of Controlled Reception Pattern Antennas
(CRPAs) has limited their use to capital ships and key aircra. The GAJT-710ML CRPA
from NovAtel combines an antenna array and null forming electronics into a marine
hardened enclosure that is suitable for installation on a wide range of land vehicles.
LEADING EDGE TECHNOLOGY
The system uses NovAtel’s seven element combined patch and Pinwheel® antenna
array to receive GNSS 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 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-710ML is a standard Radio Frequency (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-710ML
ensures future compatibility with M-Code GPS.
+
Low cost anti-jam protection for
land vehicles
+
Easy to integrate, ideal for
retrofitting
+
Anti-jam protection in dynamic
multi-jammer scenarios
+
Compatible with legacy
GPS receivers
FEATURES
+
Aordable 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
For more information about GAJT, visit
www.gnss.ca or email
info@gnss.ca
BENEFITS
PERFORMANCE
GNSS (GPS) Signals
Center frequency
L1 1575.42 MHz
L2 1227.6 MHz
Controlled Reception Pattern
Antenna (CRPA)
Number of elements 7
Bandwidth ±11 MHz (centered on L1 and L2)
Noise figure 3 dB
LNA gain 30 dB
VSWR ≤2.0:1
RF output 50 Ω TNC
INTERFERENCE REJECTION
Simultaneous L1 and L2
Interference suppression 40 dB (typical)
Number of simultaneous nulling directions 6
PHYSICAL AND ELECTRICAL
Dimensions 290 × 290 × 120 mm
Weight 7.5 kg
Power
Power consumption 25 W
Input voltage +10 to +28 VDC
ENVIRONMENTAL
MIL-STD-810G
Temperature
MIL-STD-810G 505.5, NATO A-1
Operating -40°C to +71°C
Storage -55°C to +85°C
Humidity
MIL-STD-810G 507.5, Proc. II
Altitude
MIL-STD-810G 500.5
Operating 3,600 m/12,000’
Storage 12,000 m/40,000’
Solar Radiation
MIL-STD-810G 505.5, NATO A-1
Corrosion
MIL-STD-810G, 509.5
MIL-STD-810G
Water
MIL-STD-810G, 512.5
IEC 60529 IPX6
Sand and Dust
MIL-STD-810G, 510.5
Vibration
MIL-STD-810G, 514.6 tracked and
ground wheeled
Shock
MIL-STD-810G, 516.6
Compliance
CE, FCC, WEEE
Connectors
Power MIL-C-26482, Series 2
RF TNC (Female)
Service MIL-DTL-38999, Series 3
ACCESSORIES
• 5 m unterminated GAJT vehicle
power cable
EXPORT APPROVALS
Canadian Controlled Goods
OTHER GAJTS
GAJT-710MS™
• Single enclosure system for warships
and other marine vessels
• 7-element antenna array
• Easy to integrate, ideal for retrofitting
GAJT-AE-N™
• Suitable for smaller platforms
including UAVs
• Antenna electronics for 4-element
antenna array
• Works with most 4-element antenna
arrays (supplied separately)
7-element Pinwheel Antenna Array
The 7-element Pinwheel antenna array
allows gain pattern shapes to be changed
in response to interference. Provides 6
independent nulls.
For more information about GAJT, visit
www.gnss.ca or email
info@gnss.ca
gnss.ca
sales@gnss.ca
1-855-OEM-GNSS (U.S. and Canada)
or 778-430-5999
Europe 1-855-636-4677
SE Asia and Australia 1-855-636-46771
Version 0C Specifications subject to change without notice.
©2016 NovAtel Inc. All rights reserved.
NovAtel, GAJT and Pinwheel are registered trademarks of NovAtel
Inc.
GAJT-710MS and GAJT-AE-N are trademarks of NovAtel Inc.
D20206 October 2016
Printed in Canada.
GAJT-710ML
™
