Description
The TW3870 employs Tallysman’s unique Accutenna™ technology providing dual band GPS L1 & L2 and GLONASS G1 & G2 coverage and is especially designed for precision dual frequency positioning.
The TW3870 features a precision tuned, circular dual feed, 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 TW3870 offers excellent axial ratio and a tightly grouped phase center variation. The TW3870 covers GPS L2 (1227.6MHz), GLONASS G2 (1248MHz centre), GPS L1/WAAS/EGNOS/MSAS (1575.42MHz) and GLONASS G1 (1602MHz, centre).
The TW3870 is housed in a through-hole mount, weather-proof enclosure for permanent installations. L Bracket or Pipe Mount (part numbers 23-0040-0, 23-0065-0 respectively) are available for non-rooftop installation. A 100mm ground plane is recommended for non-roof-top installations. This antenna has been calibrated by NGS.
This product is also available in an OEM format.
Applications
• Precision GPS position
• Dual Frequency RTK receivers
• Mission Critical GPS Timing
• Military & Security
• Network Timing and Synchronisation
Key Features
- Very low Noise Preamp, < 2dB
- Axial ratio: <2dB typ.
- Tight Phase Center Variation
- LNA Gain 35 dB typ.
- Low current: 25 mA typ.
- ESD circuit protection: 15 KV
- Invariant performance from: +2.5 to 16VDC
