A Tallysman
Accutenna™
TW3740/3742 High Gain Multi-Constellation Antenna
The TW3740 and TW3742 are precision high gain
GNSS antennas covering the BeiDou B1, Galileo E1,
GPS L1, GLONASS L1 and SBAS (WAAS, EGNOS, QZSS
& MSAS) frequency band (1557 to 1606 MHz). It
employs Tallysman’s unique
Accutenna™
technology
providing truly circular polarized signal reception
through the entire bandwidth of the antenna, thereby
providing superior multipath signal rejection. It is
especially designed for precision timing, industrial,
agricultural,
military,
and
other
precision
applications.
The TW3740 features a three stage Low Noise
Amplifier, comprised of one input LNA per feed, a
mid section SAW to filter the combined output, and a
final output gain stage. An optional tight pre-filter is
available on the TW3742 to protect against
saturation by high level sub-harmonic and L-Band
signals.
The TW3740/TW3742 is housed in a permanent
mount metal base with two nickel coated nuts and a
weather-proof enclosure. Two options for mounting
are available: an L-bracket (P/N#23-0040-0) or a
pipe mount (P/N#23-0065-0).
TW3740 / TW3742
Conical radome pictured here. Flat radome also available. Also
available in White
Applications
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High Accuracy & Mission Critical Global Positioning
Timing applications
Precision Agriculture, Mining & Construction
Military & Security
Avionics
Law Enforcement & Public Safety
Fleet Management & Asset Tracking
Features
Accutenna™
technology
Great axial ratio: 1 dB typ.
Low noise LNA: 1 dB
High rejection SAW filter
High gain LNA: 40 dB typ.
Low current: 15 mA typ.
Wide voltage input range: 2.5 to 16 VDC
IP67 weather proof housing
Benefits
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Circular polarisation throughout the full bandwidth
Superior multipath signal rejection
Excellent signal to noise ratio
Great out of band signal rejection
Increased system accuracy
Ideal for harsh environments
RoHS compliant
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TW3740/3742 Multi-Constellation Antenna
Specifications
Vcc = 3V, over full bandwidth, T=25°C
Antenna
Architecture
2 dB Bandwidth
Antenna Gain (with 100mm ground plane)
Axial Ratio (over full bandwidth)
Dual, Quadrature Feeds
49 MHz
4.25 dBic
<2 dB typ., 3 dB max.
Electrical
Filtered LNA Frequency Bandwidth
Polarization
LNA Gain
Gain flatness
Out-of-Band Rejection
1557 to 1606 MHz
RHCP
TW3740: 40 dB min., 1559 to 1606 MHz
TW3742: 40 dB typ., 1559 to 1606 MHz
+/- 2 dB, 1559 to 1606 MHz
>32 dB (TW3740)
>50dB (TW3742)
>25 dB
>50dB
>35 dB
>75dB
<1.5:1
1 dB typ. (TW3740)
3.5 dB typ (TW3742)
2.5 to 16 VDC nominal (12VDC recommended max.)
15 mA typ.
15 KV air discharge
66.5 mm dia. x 21 mm H
-40 to +85 °C
Radome: ASA Plastic, Base: Zamak White Metal
150 g
Permanent ¾” (19mm) through hole mount
IP67 and RoHS compliant
Vertical axis: 50 G, other axes: 30 G
3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G
One year, parts and labour
<1500 MHz
<1550 MHz
>1640 MHz
VSWR (at LNA output)
Noise Figure
Supply Voltage Range (over coaxial cable)
Supply Current
ESD Circuit Protection
Mechanicals & Environmental
Mechanical Size
Operating Temp. Range
Enclosure
Weight
Attachment Method
Environmental
Shock
Vibration
Warranty
Ordering Information
TW3740 – Multi-Constellation Antenna
33-3740-xx-yy-zzzz
TW3742 – Multi-Constellation Antenna, with pre-filter
33-3742-xx-yy-zzzz
Where xx = connector type, yy = shape and colour of radome, and zzzz = length of cable in mm (where applicable)
Please refer to the Ordering Guide
(http://www.tallysman.com/orderingguide.php)
for the current and complete list
of available radomes and connectors.
Tallysman Wireless Inc
106 Schneider Road, Unit 3
Ottawa ON K2K 1Y2 Canada
Tel 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. © 2010 Tallysman
Wireless Inc. All rights reserved.
Rev 1.0
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