產品明細

TW8825

雙頻GNSS天線

    產品簡述
    ♦ 超低雜訊前置放大器： 2.5 dB
    ♦ 軸比：< 2dB（典型值）
    ♦ 緊密相位中心變化
    ♦ LNA增益最小26 dB
    ♦ 低電流：典型值 12 mA。
    ♦ 靜電放電電路保護：15千伏
    ♦ 性能穩定，電壓範圍：+2.5 至 16 VDC

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      產品詳細介紹Product Introduction

      TW8825 Dual Band GNSS Antenna


      The TW8825 employs Calian's patented Accutenna® technology providing dual-band GPS-L1/L5, GLONASSG1, Galileo E1/E5a, and BeiDou B1/B2a coverage and is especially designed for precision dual frequency positioning where light weight is important.

      The TW8825 features a precision tuned, circular dualfeed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wide-Band LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output.

      The TW8825 offers excellent axial ratio and a tightly grouped phase centre variation.

      The TW8825 has a pre-filter which increases the antenna’s immunity to high-amplitude interfering signals, such as LTE and other cellular signals. A 100 mm diamter ground plane is recommended for optimal antenna performance.        


      Coverage:

      Feature:

      • Very low noise preamp:  2.5 dB
      • Axial ratio: < 2.0 dB typ.
      • Tight phase centre variation
      • High-gain LNA: 26 dB typ.
      • Low current: 12 mA typ.
      • ESD circuit protection (15 kV)
      • Invariant performance from 2.5 to 16 VDC


      Applications:

      • Autonomous unmanned aerial vehicles (UAVs)
      • Precision GPS position
      • Dual-frequency RTK receivers
      • Mission Critical GPS Timing
      • Safety & security
      • Network timing & synchronization
       

      Antenna:- Measured with a 100 mm ground plane

      Frequency BandwithOut of Band Rejection
      1559 - 1606 MHz1165 - 1189 MHzUpper BandLower Band
      > 35 dB @ < 1450 MHz
      > 30 dB @ < 1520 MHz
      > 35 dB @ > 1650 MHz      		> 40 dB @ < 1170 MHz
      > 30 dB @ < 1190 MHz
      > 32 dB @ > 1290 MHz
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