8230AJ GPS/GNSS Anti-Jam Antenna
Mountable, weather-proof protection
The Model 8230AJ is a high gain (40 dB) GNSS Anti-Jamming antenna for outdoor conditions. It uses a three-stage low noise amplifier, a mid-section SAW, and a tight pre-filter to protect against saturation by high level sub-harmonics and L-band signals. This GNSS / GPS anti-jam technology rejects signals for the lower elevation angles – where most of the interference comes from.
Mountable & Weather-Proof Anti-Jamming
The anti-jam antenna is terminated with a type “N” female connector and mounts to standard pipes via its own unique L bracket. This style of mounting makes it a drop-in replacement for existing installations, making it suitable for a wide range of applications. Featuring IP67 compliant weather-proof housing, the antenna has a high degree of protection against dust and water. Its cylindrical radome is made of high impact UV stabilized polycarbonate to protect against rain, ice, snow and salt spray.
Standard or AJ GNSS Antenna (Receiver) – Should I Use GNSS / GPS Anti-Jam Technology?
The standard antenna sees the entire view of sky, equally receiving signals from satellites at the horizon or the zenith and all points in between. However, there is increasing interference in the GNSS L1 band, whether unintentional from other transmitters like communications towers or intentional from illegal “privacy jammers”/GNSS jamming devices. The anti-jamming antenna rejects signals for the lower elevation angles – where most of the GNSS interference comes from – and only receives signals from the higher elevation angles where the satellites are. Of course, this reduces the number of satellites the GNSS receiver will see, but for the timing application, only a few satellites are needed. Moreover, with multi-constellation GNSS receivers, there are an increasing number of satellites available. So you get all the performance in timing accuracy you would get with a standard GNSS antenna plus 20 dB or more of interference rejection.
Advantages
Designed for harsh environments
Its weather-proof housing is IP67 compliant offering a high degree of protection against dust and water. Its cylindrical radome is made of high impact UV stabilized polycarbonate to protect against rain, ice, snow and salt spray.
Unique conical antenna
There is increasing interference in the GNSS L1 band, whether unintentional from other transmitters like communications towers or intentional from illegal “privacy jammers”. The AJ antenna rejects signals for the lower elevation angles – where most of the interference comes from – and only receives signals from the higher elevation angles where the satellites are.
Flexible installation options
For installations where the antenna cable length exceeds 125 meters we offer a variety of accessories to extend cable lengths including inline pre-amplifiers (Model 8227), fiber optic links and frequency down-up converters.
USE CASES
-
Jamming and Spoofing Protection for UAVs Using GNSS Signals
Get protection against GPS jamming and spoofing for any UAV application, using encrypted satellite signals and anti-jam antennas.
-
GNSS Anti-Spoofing: Jamming and Spoofing Protection For GNSS Signals In Defense Applications
Get protection against GPS jamming and spoofing – ensuring continuity of mission-critical navigation, communication and radar systems.
LEARN MORE
-
Winning Navigation Warfare
Defending critical systems that provide positioning, navigation and timing to U.S. forces and their allies have become indispensable to military operations.
-
Mitigating an NTP Distributed Denial of Service (DDoS) Attack
Is the “NTP over Internet” really a secure method to solve network timekeeping requirements? Is it okay for some industries, and not others? Let’s explore the subject.
-
Beyond GPS: A Multilayered Approach to Addressing PNT Vulnerabilities
This white paper discusses options for deploying a range of interlocking and overlapping solutions. In this multilayered vision, existing and emerging technologies can be used to minimize threats.
REQUEST A QUOTE
FEATURES
- High bandwidth to receive GNSS signals:
- GPS L1
- GLONASS L1
- Beidou B1
- Galileo E1
- QZSS L1
- Unique conical antenna pattern rejects interference from the horizon
- Drop-in replacement for the Model 8230 Outdoor antenna for use in high interference situations
- Designed for harsh environments (IP67 rated)
- High out-of-band rejection
- One-year limited warranty
SPECS
- Type: Active
- Frequency: 1559 to 1606 MHz
- Out-of-Band Rejection: •
- < 1500 MHz: > 50 dB
- > 1650 MHz: > 50 dB
- Gain: 40 dB from internal
- LNA Antenna Pattern: 0 dB at zenith, 15 dB or more rejection at < 30 degrees elevation
- Connector: N type, female
- Recommended Cable: Low Loss LMR-400 Equivalent
- Maximum Cable Length: 125 meters meters (400 ft.)
- Power: 2.5 to 16 Volts, 19 milliamps (typical), powered by receiver
- Size: 100 mm dia. (3.9”); 101.5 mm H (4”) from base to top; 127.2 mm H (5”) including “N” connector
- Enclosure: Radome: High Temperature UV Resistant Polycarbonate.; Base: Zamak White Metal
- Weight: 370g (13.1oz)
- Compliance: IP67 and RoHS
- Temperature Range: -40º to +85º C (–40º to +185º F)
- Mounting: L-bracket (included) for vent pipe/pole mounting via hose clamps (included), PVC pipe sold separately
