A Tallysman Accutenna?

TW3470/TW3472 GPS/GLONASS Timing Antenna*

Applications

? GPS / GLONASS Fixed timing

? High Accuracy & Mission Critical Global Positioning

? Precision Timing, Mining & Construction

? Military & Security

? Law Enforcement & Public Safety

? Fleet Management & Asset Tracking

Features

? Great axial ratio: 1 dB typ.

? High gain LNA: 40 dB min.

? Low noise LNA: 1dB/3.5dB typ TW3440/TW3442

? Available sharp pre-filter (TW3442)

? Low current: 20 mA typ.

? Wide supply voltage: 2.5 to 16 VDC

? IP67 weather proof housing

? Available flat-top radome ( Apps)

Benefits

? Excellent circular polarisation

? Long Cable Runs

? Excellent signal to noise ratio

? Excellent multipath rejection

? Exceptional out-of-band rejection (TW3472)

? Increased system accuracy

? Ideal for harsh environments

? RoHS and CE compliant

The TW3470/TW3472 employs Tallysman’s unique

Accutenna? technology in its 40dB fixed mount

Timing antennas covering the GPS L1, GLONASS L1

and SBAS (WAAS, EGNOS & MSAS) frequency bands

(1574 to 1606 MHz). They are especially designed for

timing, precision and military applications and offer

excellent circular polarized signal reception,

multipath rejection and out of band signal rejection.

The TW3440/TW3442 feature a highly circular dualfeed

wideband patch element, with a three stage Low

Noise Amplifier. This configuration provides excellent

axial ratio that is constant across the full frequency

band. An optional tight pre-filter is available with part

number TW3472 to protect against saturation by high

level sub-harmonics and L-Band signals.

The TW3470/TW3472 is housed in a permanent

mount industrial grade weather-proof enclosure. Two

options for pole mounting are available an L-bracket

(P/N#23-0040-0) or a pipe mount (P/N#23-0065-0).

TW3470/TW3472 GPS/GLONASS Timing Antenna

Specifications

Antenna

Architecture Dual, Quadrature Feeds

1 dB Bandwidth 32 MHz

Antenna Gain (with 100mm ground plane) 4.25 dBic

Axial Ratio (over full bandwidth) 1 dB typ., 3 dB max.

Electrical

Architecture TW3470: One LNA per feed ->Combiner ->SAW -> 2-Stage LNA

TW3472: (SAW-> LNA) per feed ->Combiner -> SAW -> 2 Stage LNA,

Filtered LNA Frequency Bandwidth 1574 to 1606 MHz

Polarization RHCP

LNA Gain 40 dB min., 1575.42 to 1606 MHz

Gain flatness +/- 2 dB, 1575 to 1606 MHz

Out-of-Band Rejection <1500 MHz >32 dB (TW3470) >50dB (TW3472)

<1550 MHz >25 dB >50dB

>1640 MHz >35 dB >70dB

VSWR (at LNA output) <1.5:1

Noise Figure 1 dB typ. TW3470 3.5dB typ. TW3472

Supply Voltage Range (over coaxial cable) 2.5 to 16 VDC (12VDC recommended maximum)

Supply Current 20 mA typ.; 25 mA max at 85 °C

ESD Circuit Protection 15 KV air discharge

Mechanicals & Environmental

Mechanical Size 66.5 mm dia. x 21 mm H

Operating Temp. Range -40 to +85 °C

Enclosure Radome: EXL9330, Base: Zamak White Metal (M18x1thread)

Weight 135 g

Attachment Method Permanent ?” (19mm) through hole mount

Environmental IP67, CE and 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

Legacy Part Numbers:

TW3470 – GPS/GLONASS Antenna 32-3470-xx-yy TW3472 – 32-3472-xx-yy

Connector: xx = 00 TNC xx = 01 N Type (premium applies)

Radome Colour yy = 00 Dark conical yy = 01 White conical

* As a result of a growing product portfolio, Tallysman has rationalized its part number system. No changes have been

made to the mechanical or electrical properties of these products. Where administratively possible, please use the

following Part Numbers.

TW3440 – GPS/GLONASS/Galileo Antenna 33-3440-xx-yy-zzzz TW3442 – 33-3442-xx-yy-zzzz

Where xx = connector type, yy = shape and colour of radome, and zzzz = cable length in mm (where applicable)