33-3872-01-01

## TW3872 

## Multi-Constellation Dual-Band Antenna 

> **Frequency Coverage:** GPS L1, L2 | GALILEO E1 | BEIDOU B1 | GLONASS G1, G2 

The TW3872 employs Calian's patented Accutenna® technology providing dual-band GPS-L1/L2, GLONASS-G1/G2 + BeiDou B1 + Galileo E1 coverage and is especially designed for precision dual frequency positioning. 

The TW3872 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 wideband LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output. 

The TW3872 offers excellent axial ratio and a tightly grouped phase centre variation. 

The TW3872 covers GPS L2 (1227.6MHz), GLONASS G2 (1248MHz centre), GPS-L1/WAAS/EGNOS/MSAS (1575.42 MHz), GLONASS-G1 (1602 MHz, centre), BeiDou B1 and Galileo E1. (1561 and 1589 MHz). The TW3872 has a pre-filter which increases the antenna’s immunity to high-amplitude interfering signals, such as LTE and other cellular signals. 

The TW3872 is housed in a through-hole mount, weatherproof 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 100 mm ground plane is recommended for optimal performance 

This product is also available in an OEM formats (TW3867, and TW3872E). 

## Applications 

- Precision GPS position 

- Dual-frequency RTK receivers 

- Mission Critical GPS Timing 

- Law enforcement and public safety 

- Network timing & synchronization 

## Features 

- Very low noise preamp 

- Low axial ratio (< 2.0 dB typ.) 

- Tight phase centre variation 

- High-gain LNA (35 dB typ.) 

- Low current (24 mA typ.) 

## Benefits 

   - Ideal for L1/L2 RTK surveying systems 

   - Great multipath rejection 

   - Increased system accuracy 

   - Great signal-to-noise ratio 

   - CE RED, RoHS, and REACH compliant 

- ESD circuit protection (15 kV) 

- Invariant performance from 2.5 to 16 VDC 

About Calian: With global headquarters and manufacturing in Ottawa, Canada, Calian is a leading manufacturer of highprecision antennas and components for Global Navigation Satellite System (GNSS) applications. Calian’s mission is to support the needs of a new generation of positioning systems by delivering unprecedented antenna precision at competitive prices. Learn more at www.calian.com 

Contact us: info@tallysman.com T: +1 613 591-3131 

Revision: 202407 

**Frequency Coverage:** GPS L1, L2 | GALILEO E1 | BEIDOU B1 | GLONASS G1, G2 

## Multi-Constellation Dual-Band Antenna 

Antenna - Measured with a 100 mm ground plane 

## **Low Noise Amplifier (LNA)  - Measured at 3V and 25** ° **C** 

Technology Dual-feed Stacked RHCP ceramic patch 

||Gain<br>Axial Ratio|
|---|---|
||dBic typ. at Zenith<br>dB at Zenith|
|GPS / QZSS<br>GLONASS<br>GNSS|L1<br>L2<br>L5<br>G1<br>G2<br>G3<br>3.8<br>< 1.5<br>4.0<br>< 1.5<br>4.5<br>≤ 1<br>4.0<br>≤ 1<br>-<br>-<br>-<br>-<br>~~es~~<br>~~es~~<br>~~esee~~<br>~~es~~<br>~~es~~<br>~~ee~~<br>~~esee~~<br>~~es~~|
|E1<br>E5A<br>E5B<br>E6<br>B1<br>B2b<br>B2a<br>B3<br>L5<br>-<br>-<br>-<br>-<br>-<br>BeiDou<br>4.0<br>≤ 1<br>-<br>IRNSS / NavIC<br>-<br>-<br>-<br>Galileo<br>4.0<br>-<br>-<br>-<br>-<br>-<br>≤ 1<br>~~es~~<br>~~ee~~<br>~~esee~~<br>~~es~~<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~esee~~<br>~~es~~<br>~~a~~||
|L6<br>QZSS<br>-<br>-<br>~~a~~||
|-<br>-<br>L-Band Services (1539 MHz - 1559 MHz)<br>~~a~~||
|Satellite Communications<br>Iridium<br>-<br>-<br>~~es~~||
|Globalstar|-<br>-|
|Other||
|Axial Ratio at 10°<br>-<br>Efficiency<br>-<br>~~a~~||
|PCV Φ > 15°<br>± 10 mm<br>PCO<br>~~a~~||
|||
|**Mechanicals**||
|Size|66.5 mm (dia.) x 21 mm (h.)|
|Weight|185 g|
|Radome|LEXAN™ EXL9330, Base: Zamac Metal|
|Mount|Through-hole (100 mm ground plane provided)|
|Available Connectors<br>Please refer to ordering guide||
|**Environmental**||
|-40 °C to +85 °C<br>Operating Temperature||
|Storage Temperature<br>-55 °C to +95 °C||
|Vibration|MIL-STD-810-E - Test Method 514.5|
|Shock|MIL-STD-810-G - Test Method 516.6|
|Salt Fog|MIL-STD-810-F - Test Method 509.5|
|Other Tests|Hail, Humidity, Dust, Rain, Sand, Solar|
|IP Rating|IP69K|
|Compliance|IPC-A-610, FCC, CE RED, RoHS, REACH|
|**Warranty**||
|Parts and Labour|3-year standard warranty|



**==> picture [212 x 92] intentionally omitted <==**

**----- Start of picture text -----**<br>
Frequency Bandwith Out of Band Rejection<br>> 40 dB @ < 1180 MHz<br>Lower Band 1215 - 1254 MHz > 30 dB @ < 1190 MHz<br>> 32 dB @ > 1284 MHz<br>L-Band Corr. -<br>> 40 dB @ < 1450 MHz<br>> 30 dB @ > 1520 MHz<br>Upper Band 1559 - 1606 MHz > 35 dB @ > 1650 MHz<br>**----- End of picture text -----**<br>


|Architecture|Pre-filtered|
|---|---|
|Gain|35 dB typ., 32 dB min.|
|Noise Figure|2.5 dB typ.|
|VSWR|< 1.5:1 typ., 1.8:1 max.|
|Supply Voltage Range|2.5 to 16 VDC nominal, up to 50mV p-p ripple|
|Supply Current|24 mA typ., 25 mA max. at 75 °C.|
|ESD Circuit Protection|15 kV air discharge|
|P 1dB Output|-|
|Group Delay|-|



**Mechanical Diagram - Units in 'mm' or 'inches' where specified** 

## **Ordering Information** 

33-3872-xx-yy-zzzz 

Part Number 

Where xx = connector type, yy = shape and colour of radome and zzzz = cable length in mm (where applicable) Please refer to our Ordering Guide to review available radomes and connectors at: https://www.tallysman.com/resource/tallysman-ordering-guide/ 

© 2023 Calian Inc. All rights reserved. Calian, the “Confidence. Engineered.” tag line and the Calain logo are trademarks or registered trademarks of Calian Inc. and/or its affiliates in Canada and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The information presented is subject to change without notice. Calian assumes no responsibility for any errors or omissions in this document. Calian hereby disclaims any or all warranties and liabilities of any kind. 

202407 

Revision: