Datasheet:Overview
Tallysman’s TW7875 is a magnetic mount antenna for reception of GPS L1/L5, GLONASS G1, BeiDou B1, Galileo E1/E5a, NavIC L5 and is especially designed for precision dual frequency positioning.
The TW7875 provides superior multi-path rejection and axial ratio, a linear phase response, and tight Phase Centre Variation (PCV), while protecting against intermodulation and saturation caused by high level cellular 700MHz signals. This antenna is ideal for precision agriculture, autonomous vehicle tracking and guidance, and other applications where precision matters.
The TW7875 features a precision tuned, twin circular dual feed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, pre-filtered to minimize interference from out of band signals such as Cellular LTE then amplified in a wide-band LNA and band-split for additional filtering and amplification stages prior to recombination at the output. It provides reception for signals in the bands 1164MHz to 1189MHz and 1557MHz to 1606MHz.
The TW7875 is housed in a magnetic mount, weather-proof enclosure. It can be ordered without the magnet since it can be mounted by screws and/or double sided adhesive tape.
The TW7875 antenna is also available in an embedded version; the TW3875.
Features
- Very low noise preamp 2.5dB
- Axial ratio <2dB typ.
- IP67 Housing
- Tight phase center variation
- LNA gain: 32 dB typ
- Low current: 24 mA typ
- ESD circuit protection: 15 KV
- Invariant performance from +2.5 to 16 VDC
Benefits
- Ideal for dual band RTK surveying systems
- Great multipath rejection
- Increased system accuracy
- Great signal to noise ratio
- IP67, REACH, RED and RoHS compliant
Technical Specifications
| – Patch Architecture: Circular, dual-feed, dual stacked patch |
| – L5 Gain (100mm ground plane), 1164-1189MHz 4.0 dBic Min at Zenith on 100mm Ground Plane |
| – L1 Gain (100mm ground plane), 1575.42MH-1606MHz 4.5 dBic Min at Zenith on 100mm Ground Plane |
| – Axial Ratio, over full bandwidth, both L1 & L5 ≤ 2dB typ., 1 dB max. at Zenith, 3dB max at horizon |
| – 1dB Bandwidth L5: 1164MHz-1189MHz L1: 1557MHz–1606MHz |
| – Polarization RHCP |
| – Mount Magnetic, no-magnet, or with adhesive tape |
Ordering
The TW7875 and the TW3875 antennas from Tallysman can be ordered through TransiTiva. Please complete the Request Pricing form and send us your inquiry if you need more information.
