產品明細

TW3885T

雙頻 (L1/L5) 授時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 < 2.0 dB）
    ♦ 緊密相位中心變化
    ♦ 高增益低雜訊放大器（典型值 40 dB）
    ♦ 低電流（典型值 32 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
    ♦ 符合 IP69K、REACH 和 RoHS 標準

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      產品詳細介紹Product Introduction

      TW3885T Dual-Band (L1/L5) Timing GNSS Antenna


      The TW3885T is a precision-tuned dual-band Accutenna® technology antenna providing GPS/QZSS-L1/L5, GLONASS-G1/G3, Galileo-E1/E5a/E5b, BeiDouB1/B2a/B2, NavIC-L5 plus L-band Corrections, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)].

      Calian's eXtended Filter (XF) antenna technology has been designed to mitigate out-ofband signals and prevent GNSS antenna saturation. 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 (GLONASSG1)] 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. 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 TW3885T features a precision-tuned, twin circular dual-feed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wideband LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output.       The TW3885T offers excellent axial ratio and a tightly grouped phase centre variation.

      Ideal for timing, the TW3885T provides superior multipath signal rejection, a linear phase response, and tight phase centre variation (PCV).

      The TW3885T is housed in a through-hole mount, weatherproof enclosure for permanent installations. L-bracket (PN 23-0040-0) or pipe mount (23-0065-0) are available. A 100-mm ground plane is provided for all installations.
       
      • Precise Timing

      Antenna:- Measured with a 100 mm ground plane

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