Tallysman TW2505

TW2505 Embedded Globalstar STU Antenna

The TW2505 by Tallysman Wireless is a professional grade, embedded, passive left hand circularly polarized antenna for the 1610 to 1620 MHz frequency band, specifically designed to maximize the performance of the Globalstar STU Modem.



The TW2505 features a high performance dual feed patch element that provides great axial ratio (3 dB max) over the entire Globalstar frequency band, thus signals at the band edges remain truly circular, unlike the response of single feed antennas.

The TW2505 provides excellent Globalstar signal coverage, and comes in a compact circular form factor with a built-in 50 mm diameter ground plane and with a 15 cm RG174 cable.


  • Simplex Transmit Unit (STU) Applications
  • Sea & Land Container Tracking
  • Military & Security
  • Fleet Management & Asset Tracking
  • Marine & Avionics Systems
  • Law Enforcement & Public Safety


  • Custom high gain 4 dBic dual-feed patch
  • Great axial ratio, 3 dB over full bandwidth
  • 15 KV ESD circuit protection
  • Robust design
  • Small form factor


  • Excellent circular polarized signal transmission
  • Industrial temperature range
  • Rugged Design
  • RoHS compliant

Ordering Information

  • TW2505 Globalstar STU antenna, 15cm cable, SMA Male – 32-2505-0
  • TW2505 Globalstar STU antenna, 15cm cable, MCX R/A – 32-2505-5
  • TW2505 Globalstar STU antenna, 15cm cable, MMCX R/A – 32-2505-6