SBG -Antenne Ellipse D GNSS Triple Bande avec L-Band -TW3972

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

SBG Systems

873-0037

SBG - Ellipse D GNSS Triple-Band Antenna with L-Band - TW3972

The Tallysman TW3972 antenna is a high-precision triple-band GNSS Accutenna® antenna with L-band support.

Retail priceBenefit from the professional rate

435,90€

Shipping calculated at checkout.

Import duties and taxes are payable by you on delivery.

Prices shown excluding VAT for Türkiye. If your delivery address is in the European Union, the VAT of the destination country will be added at checkout.

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Operating voltage	2.5 to 16 VDC
Operating temperature	-40°F to +176°F
Product width	66 mm
Product height	21 mm
Product depth	66 mm
Ingress protection	IP69K
Mounting type	Permanent through-hull mounting (¾” / 19mm)
Certifications	CE RED, RoHS, REACH, FCC, IPC-A-610, EN45545-2, EN50121, EN50155, EN61373, AAR S-9401.V1.0, MIL-STD-810-E 514.5 (vibrations), MIL-STD-810-G 516.6 (shocks), MIL-STD-810-F 509.5 (salt mist)
Supported GNSS systems	GPS L1/L2/L5, GLONASS G1/G2/G3, BeiDou B1/B2/B2a, Galileo E1/E5a+b, NavIC L5, L-band correction services, SBAS (WAAS, EGNOS, MSAS, GAGAN)
GPS antenna connector	TNC female
Antenna type	External antenna

Detailed description

The Tallysman TW3972 triple-band GNSS antenna is designed for demanding maritime and land applications requiring high-precision positioning. Featuring Accutenna® technology, this antenna provides extended coverage of GNSS constellations, including GPS L1/L2/L5, GLONASS G1/G2/G3, BeiDou B1/B2/B2a, Galileo E1/E5a+b, NavIC L5, as well as L-band correction services and SBAS (WAAS, EGNOS, MSAS, GAGAN). It is particularly suited for triple-frequency RTK and PPP receivers.

Technical performance and robustness

The TW3972 stands out with its dual-stacked patch architecture with dual circular feed, precisely tuned. Signals from the two orthogonal feeds are combined and amplified by a wideband LNA, then tightly filtered for each band before recombination. This design ensures superior multipath signal rejection, linear phase response, and very low phase center variation (PCV). The LNA preamplifier features very low noise (< 2.5 dB typical) and high gain (37 dB typical), optimizing the signal-to-noise ratio. A robust pre-filter is integrated to attenuate interference from LTE and cellular bands, including Ligado.

Documentation

Type	Nom
	EN - Fiche technique - Antenne GNSS TW3972 (Calian, rév. 202407)

Expert opinion

Pol CONIN

Digital Manager

« Tallysman TW3972 antenna: triple-band GNSS precision for extreme environments »

The Tallysman TW3972 antenna is a critical component for high-precision GNSS systems, particularly in professional and autonomous maritime applications. Its full triple-band support (L1/L2/L5, G1/G2/G3, E1/E5a+b, B1/B2/B2a, L5 NavIC) and L-band correction services ensure compatibility with current and future GNSS constellations, delivering robust and redundant positioning data. This feature is essential for RTK and PPP solutions where centimetric accuracy is required.

The antenna’s design, incorporating Accutenna® technology, provides exceptional multipath rejection and minimal phase center variation (PCV). These advantages result in more stable and precise positions in complex environments such as urban areas or near reflective surfaces on vessels. The integrated LTE/cellular interference pre-filter is a significant benefit, preserving signal integrity where other antennas may fail. Its IP67/IP69K rating, combined with MIL-STD and European rail shock, vibration, and salt fog certifications, confirms its suitability for continuous operation in extreme marine conditions.

With consistent performance across a wide voltage range (+2.5 to 16VDC) and low current consumption (24 mA typical), the TW3972 simplifies power management. Its standard through-hole mounting and support options (bracket/mast) offer versatile installation possibilities. This antenna serves as an ideal front-end for high-end inertial navigation systems such as the SBG Ellipse D, providing the raw GNSS data quality required for sensor fusion and precise navigation algorithms, thereby enhancing overall system performance and reliability.

Durabilité

Facilité d'installation

Rapport performance / prix

Payment and security

Your payment information and data are processed securely.

SBG - Ellipse D GNSS Triple-Band Antenna with L-Band - TW3972

435,90€

Frequently Asked Questions

Need help? Contact us

Which GNSS constellations does the TW3972 antenna support?

The Tallysman TW3972 antenna supports a wide range of GNSS constellations and correction services. It covers:

GPS: L1, L2, L5
GLONASS: G1, G2, G3
BeiDou: B1, B2, B2a
Galileo: E1, E5a+b
NavIC: L5
As well as L-band and SBAS correction services (WAAS, EGNOS, MSAS, GAGAN).
It is specifically designed for triple-frequency precision positioning.

What type of mounting is recommended for the TW3972 antenna?

The TW3972 antenna is designed for permanent installation via a ¾" (19mm) through-hull mounting. For installations not on a roof, a ground plane of 100mm is recommended.

Optional mounts, such as an L-bracket (part number 23-0040-0) or a pipe mount (part number 23-0065-0), are also available for alternative mounting options.

What are the power supply specifications for the TW3972 antenna?

The TW3972 antenna operates within a supply voltage range of +2.5 to 16 VDC (nominal, up to 50 mV peak-to-peak ripple). Current consumption is typically 24 mA at 25°C. It also features electrostatic discharge (ESD) protection rated at 15 kV (air discharge).

Is the TW3972 antenna compatible with RTK receivers?

Yes, the TW3972 antenna is specifically designed for high-precision positioning applications. It is ideal for triple-frequency RTK (Real-Time Kinematic) receivers as well as PPP (Precise Point Positioning) systems, delivering high accuracy for demanding applications such as precision agriculture or autonomous vehicle guidance.

How does the TW3972 antenna handle interference from external signals?

The TW3972 antenna is equipped with an integrated robust pre-filter. This filter is designed to attenuate interference from intermodulation signals originating from LTE bands and other cellular bands, including those from Ligado, thereby ensuring better GNSS signal integrity.

What are the dimensions and weight of the TW3972 antenna?

The TW3972 antenna has mechanical dimensions of 66 mm x 21 mm. Its weight is 185 grams. It is recommended to use a ground plane of 100 mm for installations that are not on a roof.

What are the advantages of the Accutenna® technology used in this antenna?

Tallysman’s Accutenna® technology, integrated into the TW3972 antenna, provides several key advantages for high-precision positioning:

Superior rejection of multipath signals, reducing errors caused by signal reflections.Linear phase response.Very low phase center variation (PCV), contributing to improved system accuracy.Low axial ratio (typically below 1.5 dB), ensuring excellent reception of circularly polarized signals.

Is a site plan required for installing the TW3972 antenna?

Yes, a 100 mm ground plane is recommended for TW3972 antenna installations that are not mounted on a roof (non-rooftop installations).

What is the gain of the LNA (low-noise amplifier) in the TW3972 antenna?

The TW3972 antenna is equipped with an LNA (Low Noise Amplifier) with a typical gain of 37 dB. Its preamplifier has very low noise, generally below 2.5 dB.

For which precision applications is the TW3972 antenna particularly suited?

The TW3972 antenna is particularly suited to demanding applications requiring high positioning accuracy. This includes:

Precision agricultureVehicle tracking and autonomous guidanceMilitary and security applicationsTriple-frequency RTK surveying systems

Are there specific mounting accessories for the TW3972 antenna?

Yes, for installations not on a roof, mounting accessories are available. These include an L-bracket (part number 23-0040-0) or a pipe mount (part number 23-0065-0).

Is the TW3972 antenna compliant with specific environmental standards?

Yes, the TW3972 antenna complies with several environmental standards. It is RoHS, RED, and REACH certified. Additionally, its housing is waterproof and meets IP67 and IP69K standards.