Tallysman TW1500 Embedded Globalstar Antenna

The TW1500 employs Tallysman’s unique Accutenna® technology, covering the Globalstar frequency band (1610 MHz – 1620 MHz).

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Product Documents

The TW1500 is a low cost dual feed, passive Left Hand Circularly Polarised (LHCP) antenna  specifically designed to maximise the performance of the Globalstar STU (Simplex Transmit Unit) modems.

The TW1500 has a wide-band dual-feed patch element with excellent axial ratio across the entire Globalstar bandwidth. Unlike single feed antennas, the TW1500 provides excellent multi-path rejection and a truly circular transmission response across the full bandwidth.

The embedded TW1500 includes a built-in 35 mm circular ground plane but best performance is obtained with this augmented with a local system ground plane or reflecting surface (a DC connection is not required).

Tallysman offers custom tuning services to optimize the performance of the TW1500 for any OEM installation environment.


  • Dual-feed, wide band patch
  • Axial ratio, 3 dB over full bandwidth
  • High gain 4.25 dBic
  • 15 KV ESD circuit protection
  • Robust design
  • Small form factor
  • -40˚C to +85˚C operation


  • Better axial ratio at lower elevation angles
  • Higher transmission success rates
  • Compact form factor
  • RoHS compliant


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