CR8894PXF+ Anti-Jamming Four Element Controlled Reception Pattern Antenna (CRPA)

Interference or jamming can saturate a standard GNSS antenna’s Low Noise Amplifier (LNA), making it unusable. Calian's CR8894SXF+ uses two interference-mitigating technologies: eXtended Filtering+ (XF+) and a Controlled Reception Pattern Antenna. XF+ features > 80 dB of out-of-band rejection from 400 MHz to 3000 MHz and separates the LNA’s upper and lower signal amplification channels, if one channel is jammed the other remains usable. CRPA technology creates radiation pattern nulls in the direction of the interference/jammer, preventing LNA saturation and ensuring a usable GNSS signal. The output is a standard RF signal with the interference removed and a signal that is compatible with all Commercial Off The Shelf (COTS) GNSS receivers. The CR8894SXF+ also incorporates marine filtering where Iridium and Inmarsat signals from 1616 to 1660 MHz are rejected.

The CR8894SXF+ uses Tallysman Accutenna® technology and a low-power analog interference detection and mitigation methodology. It integrates the antenna, null-forming, and interference mitigation technology into a compact, lightweight surface-mount enclosure. Two serial interfaces are provided: one supports RS232, the other RS422. These interfaces output NMEA messages that contain jamming detection, mitigation status, jammer band, and direction relative to the antenna, enhancing situational awareness.

The lightweight, waterproof (IP69K) rugged enclosure withstands harsh conditions including marine, and land-based, jamming detection applications. The CR8894PXF+ CRPA is a pole mount antenna specially designed with marine and land-based environments in mind, supporting 5/8"-11 TPI or 1"-14 TPI inserts. A standard RF connector (TNC or N-Type) and serial interface connectors are provided, properly sealed to prevent water ingression.

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