General description
Crown GNSS Anti-Jam Systems support critical missions by providing jam free GNSS signals and resilient PNT.
With its 4-element CRPA antenna, state-of-the-art digital controller and novel beamforming techniques JAJ2-4 eliminates interference to ensure uninterrupted operation of GNSS receivers in the presence of up to 3 jamming sources.
JAJ2-4 supports various messaging formats and integrates seamlessly with civil and military GNSS receivers deployed on land, sea, air manned/unmanned platforms and fixed installations. JAJ2-4 also offers an embedded high performance GNSS receiver as an option and allows SBAS signals to be utilized for increased accuracy and reliability.
In addition to CRPA, protection performance is further improved using adaptive notch filtering and pulse blanking.
Features:
- Protection against 3 jammers
- Easy to install
- Plug and play integration into new or legacy platforms
- Immediate availability for urgent operational needs
- Compatible with all types of external GPS receivers and vehicle navigation systems, including M Code
- Antenna and controller integrated as a single unit
- Light weight and ultra compact size
- Superior suppression performance
- Embedded GNSS receiver option
- Compatibility with military standards
- Resilient PNT
APPLICATION AREAS
- Dismounted Soldier
- Fixed/Rotary Wing Aircraft
- GNSS Guided Missiles
- Unmanned Autonomous Systems
- Armored Land Vehicles
- Small Naval and Coast Guard Platforms
- Maritime EW Protection
- Critical Infrastructure EW Protection
- Advanced Transportation Systems
- Military Communications
Parameters:
Anti-Jamming ability:
Single-direction interference: better than 85dBc
Three-direction interference: better than 75dBc
Type of interference:
Band-limited Gaussian white interference, spread spectrum matching spectrum interference;
Pulse interference, sweep interference;
Mixed interference;
Anti-interference airspace:
angle of orientate:0°~360°,
angle of pitch: -30°~90°
Dimensions: (130±0.5)mm×(151±0.5)mm×(38±0.5)mm
Power consumption: 7W (at room temperature, including positioning module)
Net Weight: 350g
Identification of four major satellite navigation systems:
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GP
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GPS
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GB
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Beidou system
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GL
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GLONASS system
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GA
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GALILEO system
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GN
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GNSS hybrid
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Rf output specification
- Output signal frequency: 1.2~1.6G one of all navigation frequency points, consistent with the input frequency;
- Output signal in-band power: -65±1dBm；
- Output impedance:50Ω.
Ports Definition
Module interface definition
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Serial number
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Code name
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Connector type
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Function description
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1
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TX
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SMP-JYD
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GNSSRF Output, reserved
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2
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DATA
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J30J-9ZKP
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+12V Power input, Serial port
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Pin definition
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Pin number
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Definition
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Remarks
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1/2
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VCC12V
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Power supply
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3/4
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GND
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5
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UART_TXD
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User serial port, TTL level
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6
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UART_RXD
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7
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UART_DGND
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8
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NC
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reserved
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9
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NC
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reserved
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