A Tallysman Accutenna®
TW7972 Triple Band GNSS Antenna + L-band Correction Services
The TW7972 is precision tuned triple band, Accutenna®
technology antenna for reception of GPS L1/L2/L5, GLONASS
G1/G2/G3, BeiDou B1/B2, Galileo E1/E5a+b plus L-bandcorrections signals. The TW7972 provides superior multi-path
rejection and axial ratio, a linear phase response, and tight Phase
CentreVariation(PCV),
while
protecting
againstintermodulation and saturation caused by high level cellular
700MHz signals. This antenna is ideal for precision agriculture,autonomous vehicle tracking and guidance, and otherapplications where precision matters.

TW7972 Dimensions (mm)Architecturally, the TW7972 features a dual feed circular
stacked patch element. The signals from the two orthogonal
feeds are summed in quadrature, pre-filtered in a low loss filter
to protect against a wide range of potentially interfering signals,
amplified in high linearity, wide-band LNA, then band-split,
tightly filtered and amplified prior to signal recombination at theoutput.
The TW7972 provides reception for signals in the bands
1164MHz to 1254MHz and 1525MHz to 1606MHz. It is housed
in a magnetic mount, weather-proof enclosure.
This product is also available in an OEM format (TW3967 for28dB and TW3972E for 35dB)

Applications••••

Precision GPS position
Triple Frequency RTK systems (base and rovers)
Positive Train Control (PTC) systems
Military & SecurityFeatures
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Very low Noise, Pre-filtered Preamp, 2.5dB
Axial ratio: <2dB typ.
Tight Phase Center Variation
LNA Gain 32 dB typ.
Low current: 24mA typ.
ESD circuit protection: 15 KVInvariant performance from: +2.5 to 16VDCBenefits•••••

Ideal for triple band RTK systems
Great multipath rejection
Increased system accuracy
Great signal to noise ratio
IP69K, REACH, and RoHS compliant

TW7972 Triple Band GNSS Antenna + L-band Correction Services
Specifications (Measured a Vcc = 3V, and Temperature=25°C)
Antenna
Patch Architecture
E5a/L5 Gain (100mm ground plane)
E5b/G3 Gain (100mm ground plane)
L2 Gain (100mm ground plane)
G2 Gain (100mm ground plane)
E1 Gain (100mm ground plane)
L1 Gain (100mm ground plane)
G1 Gain (100mm ground plane)
Typical Axial Ratio @ zenith
L5/E5ab<2dB
G2<2dB
L1/E1<1dB

Circular, Dual Feed, Dual Stacked Patch-1.5dBic Min at Zenith
2.5 dBic Min at Zenith
4.0 dBic Min at Zenith
2.5 dBic Min at Zenith
4.0 dBic Min at Zenith
4.0 dBic Min at Zenith
3.0 dBic Min at Zenith
L2/B2
L-BandG1<1.5dB<1dB<1.5dB

ElectricalBandwidth
L2/L5: 1164MHz-1254MHz (Filter bandwidth) L-band/L1: 1525 MHz-1606MHz (Filter bandwidth)
Overall LNA Gain
32dB typ,Gain Variation with Temperature.
3dB max over operational temperature range
LNA Noise Figure
2.5dB typ at 25°C
VSWR (at LNA output)<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
24mA typ. at 25°C, 25mA max at 75°C.
ESD Circuit protection
15 KV air discharge.
Polarization
RHCP
Out-of-Band Rejection
L5/E5/L2/G2
L1/E1/B1/G1<1050 MHz>45 dB<1450 MHz
>30dB
<1125 MHz
>30 dB>1690 MHz> 30dB>1350 MHz>35 dB>1730 MHz> 40dB

Mechanicals & Environmental
Mechanical Size, Ground Plane
Operating Temperature Range
Enclosure
WeightAttachment Method
Environmental
ShockVibration

69mm (dia) x 22mm (H)-40°C to +85°C
Radome: EXL9330, Base: Zamak White Metal
180 g
Magnetic Mount. Four-threaded holes (#6x32, 4mm deep in the base allow for screw mounting.
IP69K, RoHS, RED, and REACH compliant
Vertical axis: 50 G, other axes: 30 GMIL STD 810D

Ordering Information
TW7972 – Triple Band GNSS antenna with L-Band Correction
Where xx = connector type and yyyy = cable length in mm (where applicable)

33-7972-xx-yyyy

Please refer to the Ordering Guide (http://www.tallysman.com/index.php/gnss/ordering-guide/) for the current andcomplete list of available connectors.

Tel +1 613 591 3131

36 Steacie Drive Ottawa ON K2K 2A9 Canada
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 beregarded 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.
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