TW4721 Single Band GNSS Antenna

Tallysman TW4721 Single Band GNSS Antenna

The TW4721 single band GNSS antenna from Tallysman supports coverage for GPS/QZSS L1, GLONASS G1, Galileo E1, BeiDou B1, as well as SBAS (WAAS/EGNOS/MSAS).



Ideal for high accuracy applications while providing high out of band signal rejection, the TW4721 single band GNSS antenna from Tallysman is the smallest dual feed, high performance antenna available, providing truly circular response over its entire bandwidth thereby producing superior multi-path signal rejection.

The TW4721 features a novel 25mm dual-feed wide-band patch element that provides a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wide-band LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output.

The TW4721 is housed in a compact IP67 compliant enclosure that can be surface mounted via magnet, screws or adhesive material.

If you need enhanced protection against high level sub-harmonic signals like LTE and near frequency signals such as WiFi, the alternative TW4722 provides these additional benefits with an LNA pre-filter.


  • Cost Sensitive Mission Critical Positioning
  • UAV / UAS
  • Covert Surveillance
  • Fleet Management & Asset Tracking


  • Dual feed patch element
  • Axial ratio: 2 dB typ.
  • Low noise LNA: 1 dB
  • High rejection mid-section SAW filter
  • High gain: 25 dB typ.
  • Wide voltage input range: 1.8 to 16 VDC
  • IP67 weather proof housing
  • Low Power: 10 mA


  • Greatly enhanced multipath rejection
  • Improved GNSS reliability
  • Excellent signal to noise ratio
  • RoHS compliant
  • Ideal for harsh environments
  • Excellent out of band signal rejection


The TW4721 single band GNSS antenna 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.

TW4721 – GPS/GLONASS/BeiDou/Galileo Antenna – 33-4721-xx-yyyy
TW4722 – GPS/GLONASS/BeiDou/Galileo Antenna – 33-4722-xx-yyyy
xx = connector type yyyy = cable length in mm

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