33-3972-01-01

## A Tallysman _Accutenna[®]_ TW3972 Tri le Band GNSS Antenna + L-band Correction Services p 

The TW3972 is an _Accutenna[®]_ technology antenna providing triple band GPS L1/L2/L5, GLONASS G1/G2/G3, BeiDou B1/B2, Galileo E1/E5a+b plus L-band correction services coverage and is especially designed for precision triple frequency positioning.  The TW3972 provides superior multi-path signal rejection, a linear phase response, and tight Phase Centre Variation (PCV).  This antenna is ideal for precision agriculture, autonomous vehicle tracking and guidance, and other applications where precision matters. 

The TW3972 features a precision tuned, twin 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 antenna also has a strong pre-filter to mitigate inter-modulated signal interference from LTE and other cellular bands. 

TW3972 Dimensions (mm) 

The TW3972 offers excellent axial ratio and a tightly grouped phase center variation. 

The TW3972 covers from 1164MHz to 1254MHz and 1525MHz to 1606MHz. 

The TW3972 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 product is also available in an OEM format (TW3967 for 28dB and TW3972E for 35dB) 

## **Applications** 

- Precision GPS position 

- Triple Frequency RTK receivers 

- Military & Security 

## **Features** 

- Very low Noise Preamp, < 2.5dB 

- Axial ratio: < 1.5 dB typ. 

- Tight Phase Center Variation 

- LNA Gain 37 dB typ. 

- Low current: 24 mA typ. 

## **Benefits** 

- Ideal for triple band RTK surveying systems 

- Great multipath rejection 

   - Increased system accuracy 

- 

      - Great signal to noise ratio 

   - 

   - IP67, REACH, and RoHS compliant 

- ESD circuit protection: 15 KV 

- Invariant performance from: +2.5 to 16VDC 

## TW3972 Triple Band GNSS Antenna + L-band Correction Services 

**Specifications** (Measured a Vcc = 3V, and Temperature=25°C) 

## **Antenna** 

|**Antenna**||||
|---|---|---|---|
|Patch Architecture|||Circular, Dual Feed, Dual Stacked Patch|
|E5a/L5 Gain (100mm ground plane)|||-1.5dBic typ. at Zenith|
|B2/E5b/G3 Gain (100mm ground plane)|||2.5 dBic typ. at Zenith|
|L2 Gain (100mm ground plane)|||4.0 dBic typ. at Zenith|
|G2 Gain (100mm ground plane)|||2.5 dBic typ. at Zenith|
|E1 Gain (100mm ground plane)|||4.0 dBic typ. at Zenith|
|L1 Gain (100mm ground plane)|||4.0 dBic typ. at Zenith|
|G1 Gain (100mm ground plane)|||2.5 dBic typ. at Zenith|
|Axial Ratio @ zenith||||
|L5/E5ab|<1.5 dB typ. 2.0 dB max.|<1.5 dB typ. 2.0 dB max.|B2<br><1.5 dB typ. 2.0 dB max.|
|L2|<1.0 dB typ. 1.5 dB max.|<1.0 dB typ. 1.5 dB max.|G2<br><1.5 dB typ. 2.0 dB max.|
|L-Band|<1.0 dB typ. 1.5 dB max.|<1.0 dB typ. 1.5 dB max.||
|L1/E1|<1.0 dB typ. 1.5 dB max.|<1.0 dB typ. 1.5 dB max.|G1<br><1.5 dB typ. 2.0 dB max.|
|**Electrical**||||
|Filter Bandwidth|||L2/L5:  1164MHz-1254MHz           L-Band/ L1:  1525 MHz-1606MHz|
|Overall LNA Gain|||37dB typ, 35 dB min,|
|Gain Variation with Temperature.|||3dB max over operational temperature range|
|LNA Noise Figure|||2.5dB typ at 25°C|
|VSWR (at LNA output, reference 50 Ohms)|||<1.5:1 typ.  1.8:1 max.|
|Supply Voltage Range|||+2.5 to 16VDC nominal, up to 50mV p-p ripple|
|EMI Immunity|||50V/Meter, excepting L1+/-100MHz and L2 +/- 100MHz|
|Supply Current|||24 mA typ. at 25°C|
|ESD Circuit protection|||15 KV air discharge.|
|Out-of-Band Rejection|**L5/E5/L2/G2**||**L1/E1/B1/G1**|
||<1050 MHz|>45 dB|<1450 MHz<br>>30dB|
||<1125 MHz|>30 dB|>1690 MHz<br>> 30dB|
||>1350 MHz|>45 dB|>1730 MHz<br>> 40dB|
|**Mechanicals & Environmental**||||
|Mechanical Size, Ground Plane||66mm x 21mm (see drawing on other page), 100mm ground plane recommended||
|Operating Temperature Range||-40°C to +85°C|-40°C to +85°C|
|Enclosure||Radome: EXL9330, Base: Zamak White Metal||
|Weight||185 g||
|Attachment Method||Permanent ¾” (19mm) through hole mount||
|Environmental||IP67, RoHS, RED, and REACH compliant||
|Shock||Vertical axis: 50 G, other axes: 30 G||
|Vibration||3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G|3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G|
|Salt fog / spray||MIL-STD-810F Section 509.4|MIL-STD-810F Section 509.4|



## **Ordering Information** 

TW3972 – Triple Band GNSS antenna with L-Band Correction 33-3972-xx-yy-zzzz Where xx = connector type, yy = shape and colour of radome and zzzz = cable length in mm (where applicable) Please refer to the Ordering Guide ( http://www.tallysman.com/index.php/gnss/ordering-guide/) for the current and complete list of available radomes and connectors. 

36 Steacie Drive Ottawa ON K2K 2A9 Canada Tel +1 613 591 3131 Fax 613 591 3121 sales@tallysman.com 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. © 2015 Tallysman Wireless Inc. All rights reserved. Rev 1.6