CR8894SXF+ 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 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 is 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+ 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 (IP67) rugged enclosure withstands harsh conditions, including military, drone, and vehicle applications. The CR8894SXF+ CRPA is surface-mounted using four screws. A standard RF connector (SMA or TNC) and serial interface connectors are centrally located, properly sealed to prevent water ingression.

A future version of CR8894SXF+ antenna will support three (3) nulls per band.