產品明細

AC4990EXF-114

嵌入式多星座全頻段高精度GNSS天線

    產品簡述
    ♦ 超低雜訊前置放大器（典型值 2.5 dB）
    ♦ 低軸比（典型值 < 1.0 dB）
    ♦ 相位中心偏差較小（≤ 2 mm）
    ♦ 高增益低雜訊放大器（典型值 30 dB）
    ♦ 低電流（典型值 17 mA）
    ♦ ESD電路保護（15 kV）
    ♦ 在 2.5 至 16 VDC 電壓範圍內性能保持不變

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      詢價

      產品詳細介紹Product Introduction

      AC4990EXF-114 Embedded Multi-Constellation Full-Band Precision GNSS Antenna
       

      The AC4990EXF-114 is a precision-tuned multi-constellation, full-band Accutenna® 4 technology antenna. Supported constellations and signals are, GPS/QZSS-L1/L2/L5 QZSS-L6, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b/E6, BeiDou-B1/B2/B2a/B3, NavIC-L5, including the satellite- based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)], plus L-band Corrections.

      The AC4990EXF-114 features a precision-tuned, twin circular quad-feed, stacked patch element, with a 114 mm diameter ground plane PCB. The signals from the four orthogonal feeds are combined though a feed network, amplified in a wideband LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output. The AC4990EXF-114 quad-feed Accutenna® 4 technology enables an excellent axial ratio (strongly mitigating multipath) and a tightly grouped phase centre variation (≤ 2 mm from zenith to 15° above horizon). It is ideal for surveying, autonomous vehicle tracking and guidance, precision agriculture, and other applications where precision matters.


      The radio frequency spectrum has become more congested as new LTE bands are activated and their signals or harmonic frequencies [e.g. 800MHz x 2 = 1600MHz (GLONASS-G1)] can affect GNSS antennas and receivers. In North America, planned Ligado signals at 1525 – 1536 MHz can especially impact GNSS antennas that support space-based L-band Corrections (1539 – 1559 MHz). New LTE signals in Europe [Band 32 (1452 – 1496 MHz)] and Japan [Bands 11 and 21 (1476 – 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. The new Calian XF antennas have been designed to mitigate out-of- band signals and prevent GNSS antenna saturation. 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.


      The embedded AC4990EXF-114 features eight screw holes to allow for secure mounting and integration. Calian provides support for installation and integration of embedded antennas to enable the integrator to achieve a successful installation and obtain optimum antenna performance.

      Coverage:

      Applications:
      • High-precision GNSS systems
      • Marine navigation
      • All precision applications, such as:
        • Autonomous vehicle nav. (land, sea, air)
        • Precision agriculture
        • Land survey rover
        • RTK/PPP systems
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