The Tallysman TW1500 employs their unique Accutenna technology in a low cost dual feed, passive Left Hand Circularly Polarised antenna (LHCP) for the 1610 to 1620 MHz frequency band, specifically designed to maximise the performance of the Globalstar™ STU (Simplex Transmit Unit) modems.
The wideband dual feed patch element in the TW1500 has an excellent axial ratio across the entire GlobalstarTM bandwidth. Unlike single feed antennas, the TW1500 provides excellent multipath rejection and a truly circular transmission response across the Globalstar™ band.
The TW1500 includes a built-in 35mm circular ground plane but best performance is obtained with this augmented with a local system ground plane or reflecting surface (DC connection not required).
TW1500 antennas are easily detuned by the local environment. Tallysman offers custom tuning services for optimized integration into custom end-user modules.
Higher success rates for Globalstar™ STU transmissions
Sea & Land Container Tracking
Military & Security
Fleet Management & Asset Tracking
Marine & Avionics Systems
Law Enforcement & Public Safety
TW1500 Dual Feed Antenna
Architecture: Dual, quadrature feeds
Antenna Gain (100mm ground plane): 4.25dBic
Axial Ratio (over full bandwidth): ≤3dB
1.0 dB Bandwidth: 1600MHz to 1630MHz
Architecture: Dual Feed Patch -> Hybrid 90° Combiner
VSWR (at antenna): <1.5:1
Return Loss (-10 dB bandwidth): <-20MHz
ESD Circuit protection: 15KV air discharge
Mechanicals & Environmental
Mechanical Size: 35mm dia. x 7.25mm
Cable: 1.38mm OD, 15cm. Custom lengths optional
Operating Temp. Range: -40°C to +85°C
Attachment Method: Adhesive or M2 screw mount
Environmental: RoHS compliant
Shock: Vertical axis: 50G, other axes: 30G
Vibration: 3 axis, sweep = 15 min, 10 to 200Hz sweep: 3G