Tallysman TW3101 Non Magnetic GPS Antenna

The TW3101 by Tallysman Wireless is a precision grade, permanent mount GPS L1 antenna with no magnetic properties, specially designed to be used in close proximity with compass based instruments.

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The TW3101 features a custom high performance, dual-feed, wide band patch element. Its LNA configuration provides a LNA for each feed, a mid section high rejection SAW for the combined signal, followed by a final stage of LNA.

It provides å±10MHz bandwidth centred on 1575.42 MHz and covers all GPS L1, Galileo E1 and SBAS (WAAS/EGNOS/MSAS) signals. It features great axial ratio over the entire frequency range (<3dB), excellent circular polarized signal reception, great multipath rejection and out-of-band signal rejection.

The TW3101 is housed in a non-ferrous permanent mount industrial-grade weather-proof enclosure, and comes with a TNC Jack (female) connector.


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


  • Non magnetic composition
  • Great axial ratio: 1dB typ., 3 dB max
  • Low noise LNA: 1 dB
  • High rejection SAW filter
  • High gain: 28 dB typ.
  • Low current: 14 mA typ.
  • ESD circuit protection: 15 KV
  • Weather proof housing: IP67


  • No compass interference
  • Excellent multipath rejection
  • Increase system accuracy
  • Excellent signal to noise ratio
  • Great out of band signal rejection
  • Ideal for harsh environments
  • RoHS compliant

Ordering Information

  • TW3101 ‰ÛÒ Non Magnetic GPS L1 Antenna – 32-3101-0