Ideal for dual-frequency positioning where minimizing weight is important, the 37-gram TW1889 provides excellent axial ratio and tight Phase Centre Variation (PCV).
The TW1889 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 TW1889 also includes an LNA pre-filter that provides enhanced protection against high-level sub-harmonic signals like LTE and near-frequency signals such as WiFi.
Calian offers custom tuning services to optimize the performance of the TW1889 for any OEM installation environment.
Features
- Very low Noise Preamp, 2.5 dB
- Axial ratio: < 2 dB typ.
- Tight Phase Center Variation
- LNA Gain 26 dB typ.
- Low current: 12 mA typ.
- ESD circuit protection: 15 KV
- Invariant performance from: +2.5 to 16 VDC
Benefits
- Lightweight (37g)
- Ideal for L1/L5 RTK survey systems
- Great multi-path rejection
- Increased system accuracy
- Excellent signal-to-noise ratio
- REACH and RoHS compliant
Technical Specifications
| Noise Figure: | 2.5 dB typ. |
| Size: | 48 mm (dia.) x 13.1 mm (h.) [100 mm ground plane recommended] |
| Weight: | 37 g |
| Mount: | Adhesive | 4 ⋅ M2 screws |
| Operating Temperature: | –40 °C to 85 °C |
Ordering Information
Looking to order the Calian TW1889 GNSS antenna or have a question? Simply request a quote today and we’ll get back to you promptly.
