Tallysman TW1721

Tallysman TW1721 Dual Feed GNSS Antenna

The TW1721 by Tallysman Wireless employs the signature Accutenna™ technology to recieve GNSS and SBAS signals while providing exceptional multipath rejection.



The TW1721 uses Tallysman’s wideband Accutenna™ technology for a truly circular reception of all upper L-band GNSS and SBAS signals. Superior multi-path signal rejection offers a higher accuracy of position and time. Using a dual feed wideband patch element, the TW1721 provides a uniquely circular polarized response, and with a typical axial ratio of less than 2dB over bandwidth, it improves multipath rejection for higher precision applications than its competitors.

With a built-in 35mm circular ground plane, the TW1721 is ideally augmented using a local system ground plane or reflecting surface.


  • Tallysman’s Accutenna™ technology for superior signal rejection
  • Low noise amplifier (<1 dB) for low signal-to-noise ratio
  • High gain (28 dB typ.) for increased accuracy
  • Wide voltage input range
  • 15 KV ESD circuit protection and RoHS compliant

Technical Specifications

Antenna Gain: 4.5 dBic
Frequency Bandwidth: 1559 MHz ± 1606 MHz
Axial Ratio: 2 dB
Polarization: RHCP
Size (D x H): 35 mm x 7.25 mm
Weight: 18 g
Operating temperature: -40°C to 85°C


The TW1721 is available through TransiTiva. If you would like to learn more about it, please use the Request Pricing form to get in touch with us.

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