Tallysman TW4421 Wideband Dual Feed GPS/GLONASS Antenna

Tallysman TW4421 Wideband Dual Feed GPS/GLONASS Antenna

The TW4421 by Tallysman Wireless is a low cost dual feed GPS & GLONASS magnetic mount antenna covering the GPS L1, GLONASS L1 and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz).



The TW4421 features a novel 25mm dual feed wideband patch element that provides excellent multipath rejection and a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth. It is a great solution for high accuracy applications, and also offers high out of band signal rejection.

The two feeds from the patch element are summed in a 90° Hybrid then input to a first stage Low Noise Amplifier (LNA), followed by a mid-section SAW and a second low noise gain stage.

The TW4421 is the smallest dual feed, high performance antenna available. It is housed in a compact IP67 magnetic mount enclosure. It comes with 3 metres of cable with a wide range of connector options.


  • Cost Sensitive Mission Critical Positioning
  • Military & Security
  • Covert surveillance
  • Fleet Management & Asset Tracking


  • Dual feed patch element
  • 40% wider bandwidth, small footprint
  • Axial ratio: 3 dB Max. (GPS & GLONASS)
  • Low noise LNA: 1 dB
  • High rejection mid-section SAW filter
  • High gain: 28 dB typ.
  • Wide voltage input range: 2.5 to 10 VDC


  • 1dB Bandwidth Includes GPS-L1 & GLONASS
  • Greatly enhanced multipath rejection
  • Improved GNSS reliability
  • Excellent signal to noise ratio
  • RoHS compliant
  • Ideal for harsh environments
  • Excellent out of band signal rejection

Ordering Information

  • 32-4421-xx-yyyy – TW4422 – GPS/GLONASS Antenna, 3 metre cable, SMA Male