TW3101 Single Band GNSS Antenna with Low Magnetism

Tallysman TW3101 Single Band GNSS Antenna with Low Magnetism

The TW3101 single band GNSS antenna with low magnetism from Tallysman supports coverage for GPS/QZSS L1, as well as SBAS (WAAS/EGNOS/MSAS).



The TW3101 single band GNSS antenna from Tallysman has no magnetic properties and is specially designed to be used in close proximity with compass based instruments.

Ideal for professional precision tracking and timing applications the TW3101 provides excellent circular polarized signal reception, great multi-path and out-of-band signal rejection.

The TW3101 features a customizable high performance, dual-feed, wide band patch element. Its Low Noise Amplifier (LNA) configuration provides a LNA for each feed, a mid section mid-section Surface Acoustic Wave (SAW) filter for the combined signal, followed by a final stage of LNA. This configuration provides ± 10 MHz bandwidth centred on 1575.42 MHz.

The TW3101 is housed in a permanent mount industrial grade weather-proof enclosure, available in conical or flat radome styles and in grey or white colours. Two options for pole mounting are available an L-Bracket or a Pipe Mount.

To minimize performance impact from signal jamming threats, the TW3101 is compatible with Tallysman’s Anti-Jamming add-on, which modifies the radiation pattern of the GNSS antenna to eliminate signals arriving from -10° to +15° from horizon, while slightly increasing the gain of the antenna at zenith.


  • Inertial Navigation (IMU) Systems
  • Compass Based Systems
  • Heading Reference Systems
  • Military & Security
  • Precision Tracking & Navigation
  • Machine Control Systems


  • Great axial ratio: 1dB typ.
  • Low Noise Amplifier (LNA): 1 dB
  • High rejection SAW filter
  • High gain: 27 dB min.
  • Low current: 14 mA typ.
  • Wide voltage input range: +2.5 to 16 VDC


  • Excellent multi-path rejection
  • Increase system accuracy
  • Excellent signal to noise ratio
  • Great out of band signal rejection
  • Ideal for harsh environments
  • IP69K, RoHS and REACH compliant


The TW3101 single band GNSS antenna with low magnetism from Tallysman is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.

TW3101 – Non-Magnetic GPS L1 Antenna – 33-3101-xx-yy-zzzz
Where xx = connector type, yyyy = cable length in mm (all 4 digits required)

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