Tallysman Wideband Dual Feed GPS | GLONASS Antenna


The TW4421 by Tallysman™ is a low cost dual feed GPS & GLONASS magnetic mount antenna covering the GPS L1, GLONASS G1 and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz). The TW4421 features a novel 25mm dual feed wide-band patch element that provides excellent multi-path rejection and a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth. It has a very tight Phase Centre Variation (PCV). It is especially suitable 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 a wide range of connector options and cable lengths.

Applications include:
Fleet Management & Asset Tracking
Cost Sensitive Mission Critical Positioning
Military & Security
UAV | UAS | Drones
Covert surveillance

Key Features

  • 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 16 VDC

Additional information



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