{"id":20316,"date":"2026-01-20T17:13:07","date_gmt":"2026-01-20T17:13:07","guid":{"rendered":"https:\/\/www.calian.com\/advanced-technologies\/?post_type=gnss_product&p=20316"},"modified":"2026-01-20T17:13:07","modified_gmt":"2026-01-20T17:13:07","slug":"aj977xf-antenne-gnss-triple-bande-anti-brouillage-2","status":"publish","type":"gnss_product","link":"https:\/\/www.calian.com\/advanced-technologies\/fr\/gnss_product\/aj977xf-antenne-gnss-triple-bande-anti-brouillage-2\/","title":{"rendered":"AJ977XF Antenne GNSS triple bande anti-brouillage"},"content":{"rendered":"\n

The AJ977XF+ supports GPS\/QZSS-L1\/L2\/L5, GLONASS-G1\/G2\/G3, Galileo-E1\/E5a\/E5b, BeiDou-B1\/B2b\/B2a, and NavIC-L5 frequency bands, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)].<\/p>\n\n

The AJ977XF+ Anti Jam antenna is designed to mitigate interference and jamming signals broadcast from near ground-based transmitters. The radiation pattern of the Low Elevation Angle Nulling Antenna (LEANA) provides 20 dB (typical) wideband suppression for all GNSS band signals received at an elevation angle of 0\u00b0 through to approximately 15\u00b0. This level of attenuation was demonstrated to mitigate jamming signal broadcasts at an elevation angle of 10\u00b0 such that the AJ977XF+ can be up to 10 times closer, compared to a standard HC977XF helical antenna, to the source of interference without being jammed. The combination of Calian’s low elevation angle nulling radiation pattern and eXtended Filtering (deep filtering and high linearity) technologies provides a one-two punch to jamming and RF noise. At the same time the AJ977XF+\u2019s radiation pattern above 20\u00b0 elevation angle provides excellent gain and a phase center that supports accurate and precise positioning.<\/p>\n\n

Calian’s eXtended Filtering+ (XF+) technology features > 80 dB of out-of-band rejection from 700MHz to 2500MHz and separates the LNA\u2019s upper and lower signal amplification channels; if one is channel is jammed the other remains usable. In North America, Ligado signals at 1525 – 1536 MHz can especially impact GNSS antennas that support space-based L-band correction services (1539 – 1559 MHz). New LTE signals in Europe [Band 32 (1452 – 1496 MHz)] and Japan [Bands 11 and 21 (1476 \u2013 1511 MHz)] have also been observed to interfere with GNSS signals. In addition, Inmarsat satellite communication (uplink: 1626.5 -1660.5 MHz) can also affect GNSS signals. Calian’s custom XF filtering mitigates all existing signals and new Ligado and LTE signals, enabling the antennas and attached GNSS receivers to perform optimally.<\/p>\n\n

The Tallysman AJ977XF+ antenna is ideal of all mission critical positioning, navigation and timing applications.<\/p>\n\n

\n
\n

Applications<\/h2>\n\n\n\n
    \n
  • Mission-critical global positioning<\/li>\n\n\n\n
  • Timing applications<\/li>\n\n\n\n
  • Law enforcement and public safety<\/li>\n<\/ul>\n<\/div>\n\n\n\n
    \n

    Caract\u00e9ristiques<\/h2>\n\n\n\n
      \n
    • Excellent rapport axial (1,0 dB typ.)<\/li>\n\n\n\n
    • Faible bruit LNA (2,5 dB typ.)<\/li>\n\n\n\n
    • High-rejection XF+ Filtering<\/li>\n\n\n\n
    • LNA \u00e0 gain \u00e9lev\u00e9 (40 dB typ.)<\/li>\n\n\n\n
    • Large plage de tension d’entr\u00e9e (2,5 \u00e0 16 VDC)<\/li>\n\n\n\n
    • Protection du circuit ESD (15 kV)<\/li>\n\n\n\n
    • Bo\u00eetier \u00e9tanche IP67<\/li>\n\n\n\n
    • Conforme aux normes RoHS et REACH<\/li>\n\n\n\n
    • 20 dB attenuation at 0-15\u00b0 Elevation<\/li>\n<\/ul>\n<\/div>\n\n\n\n
      \n

      D\u00e9tails<\/h2>\n\n\n\n
        \n
      • Fonctionne sous brouillage terrestre<\/li>\n\n\n\n
      • Polarisation circulaire sur toute la largeur de bande<\/li>\n\n\n\n
      • Rejet sup\u00e9rieur des signaux \u00e0 trajets multiples<\/li>\n\n\n\n
      • Excellent rapport signal\/bruit<\/li>\n\n\n\n
      • Excellente r\u00e9jection des signaux hors bande<\/li>\n\n\n\n
      • Pr\u00e9cision accrue du syst\u00e8me<\/li>\n\n\n\n
      • Id\u00e9al pour les environnements RF bruyants<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

        The AJ977XF+ supports GPS\/QZSS-L1\/L2\/L5, GLONASS-G1\/G2\/G3, Galileo-E1\/E5a\/E5b, BeiDou-B1\/B2b\/B2a, and NavIC-L5 frequency bands, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)]. <\/p>\n

        The AJ977XF+ Anti Jam antenna is designed to mitigate interference and jamming signals broadcast from near ground-based transmitters. The radiation pattern of the Low …<\/p>\n","protected":false},"featured_media":20320,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":""},"post_tag":[],"gnss_category":[332],"gnss_industry":[320,355,323,324,326,328],"product_type":[167],"mount_type":[198],"class_list":["post-20316","gnss_product","type-gnss_product","status-publish","has-post-thumbnail","hentry","gnss_category-produits","gnss_industry-application-de-la-loi-et-securite-publique","gnss_industry-infrastructures-critiques","gnss_industry-marine-fr","gnss_industry-navigation-et-orientation","gnss_industry-synchronisation","gnss_industry-systemes-marins-et-avioniques","product_type-antennes","mount_type-trou-de-passage"],"acf":[],"yoast_head":"\nAJ977XF Antenne GNSS triple bande anti-brouillage - Calian Space (GNSS)<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.calian.com\/advanced-technologies\/fr\/gnss_product\/aj977xf-antenne-gnss-triple-bande-anti-brouillage-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AJ977XF Antenne GNSS triple bande anti-brouillage - Calian Space (GNSS)\" \/>\n<meta property=\"og:description\" content=\"The AJ977XF+ supports GPS\/QZSS-L1\/L2\/L5, GLONASS-G1\/G2\/G3, Galileo-E1\/E5a\/E5b, BeiDou-B1\/B2b\/B2a, and NavIC-L5 frequency bands, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)]. 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