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Comparing GNSS Antenna Performance
4000 Series White Paper – New Challenges for GNSS Patch Antennas
Tallysman TW4000 Series White Paper
Patch Antennas for the New GNSS (GPS World Article Feb /12)
Multi-constellation GNSS
TW2505 Embedded Globalstar™ Certified STU Antenna
The TW2505 by Tallysman Wireless is a professional grade, embedded, passive left hand circularly polarized antenna for the 1610 to 1620 MHz frequency band, certified and specifically designed to maximise the performance of the Globalstar™ STU (Simplex Transmit Unit) Modem.
The TW2505 features a high performance dual-feed patch element that provides great axial ratio (3 dB max) over the entire Globalstar™ frequency band, thus signals at the band edges remain truly circular, unlike the response of single feed antennas.
The TW2505 provides excellent Globalstar™ signal coverage, and comes in a compact circular form factor with a built-in 50 mm diameter ground plane and with a 15 cm RG174 cable.
| Applications | Features | Benefits |
|---|---|---|
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Specifications
Vcc = 3V, over full bandwidth, T=25°C
| Antenna | |
|---|---|
| Architecture | Dual, Quadrature Feeds |
| Antenna Gain (100mm ground plane) | 4.25 dBic |
| Axial Ratio (over full bandwidth) | ≤3 dB |
| Electrical | |
|---|---|
| Architecture | Hybrid 90° phase signal splitter |
| Frequency Bandwidth | 1615 MHz ±10 MHz |
| Polarization | LHCP |
| Gain Flatness | ≤1 dB, from 1610 to 1620 MHz |
| VSWR (at antenna) | <1.5:1 |
| Return Loss (10 dB bandwidth) | <-20dB |
| ESD Circuit Protection | 15 KV air discharge |
| Cross Polarization Rejection | 15 dB minimum across the band |
| Mechanicals & Environmental | |
|---|---|
| Mechanical Size | 50 mm dia. x 7.8 mm H |
| Connectors | Male, SMA straight, MCX right angle or MMCX right angle, other connectors optional |
| Cable | RG174 / 15 cm, custom lengths optional |
| Operating Temp. Range | -40 to +85 °C |
| Weight | 100 g |
| Attachment Method | Adhesive or screw mount |
| Environmental | RoHS compliant |
| Shock | Vertical axis: 50 G, other axes: 30 G |
| Vibration | 3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G |
| Warranty | One year, parts and labour |
| Ordering Information | |
|---|---|
| TW2505 – Globalstar™ STU antenna, 15cm cable, SMA Male | 32-2505-0 |
| TW2505 – Globalstar™ STU antenna, 15cm cable, MCX R/A | 32-2505-5 |
| TW2505 – Globalstar™ STU antenna, 15cm cable, MMCX R/A | 32-2505-6 |
Download TW2505 Datasheet
The information provided herein is intended as a guide only and is subject to change without notice. This document is not to be regarded as a guarantee of performance. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. © 2010 Tallysman Wireless Inc. All rights reserved.