32-2505-5

## TW2505 Embedded Globalstar _™_ Certified 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, certified and specifically designed to maximise the performance of the Globalstar™ STU (Simplex Transmit Unit) Modem. 

The TW2505 features a high performance dualfeed 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. 

TW2505 Dimensions (mm) al i 

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. 

## **Applications** 

- Simplex Transmit Unit (STU) Applications 

- Sea & Land Container Tracking 

- Military & Security 

- Fleet Management & Asset Tracking 

- Marine & Avionics Systems 

- Law Enforcement & Public Safety 

## ~~**Features**~~ 

- Custom high gain 4.25 dBic dual-feed patch 

- Great axial ratio, 3 dB over full bandwidth 

- 15 KV ESD circuit protection 

- Robust design 

## **Benefits** 

   - Excellent circular polarized signal transmission 

   - Industrial temperature range 

   - Rugged Design 

   - RoHS compliant 

- Small form factor 

## TW2505 Embedded Globalstar _™_ Certified STU Antenna 

**Specifications** Vcc = 3V, over full bandwidth, T=25°C 

## **Antenna** 

Architecture Dual, quadrature feeds Antenna Gain (100mm ground plane) 4.25 dBic Axial Ratio (over full bandwidth) ≤3 dB 

## **Electrical** 

Architecture Hybrid 90° phase signal splitter Frequency Bandwidth 1615 MHz ± 10 MHz Polarization LHCP Gain flatness ≤1 dB, from 1610 to 1620 MHz VSWR (at antenna) <1.5:1 Return Loss (over 10 dB bandwidth) <-20dB ESD Circuit protection 15 KV air discharge Cross Polarization Rejection 15 dB minimum across the band **Mechanicals & Environmental** Mechanical Size 50 mm dia. x 7.8 mm H Cable RG174 / 15 cm, custom lengths optional Operating Temp. Range -40 to +85 °C Weight 100 g Attachment Method Adhesive or screw mount Environmental RoHS compliant Shock Vertical axis: 50 G, other axes: 30 G Vibration 3 axis, sweep = 15 min, 10 to 200 Hz sweep: 3 G Warranty One year – parts and labour 

## **Ordering Information** 

Legacy Part Numbers: 

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 

* As a result of a growing product portfolio, Tallysman has rationalized its part number system.  No changes have been made to the mechanical or electrical properties of these products.  Where administratively possible, please use the following Part Numbers. 

TW2505 – Globalstar™ STU antenna, 33-2505-xx-yyyy-zz Where xx = connector type, yyyy = cable length in mm and zz = assigned by Tallysman for custom tuning Please refer to the Ordering Guide (http://www.tallysman.com/orderingguide.php) for the current and complete list of available connectors. 

## **Tallysman Wireless Inc** 

106 Schneider Road, Unit 3 Ottawa ON K2K 1Y2 Canada Tel 613 591 3131 Fax 613 591 3121 sales@tallysman.com 

The information provided herein is intended as a guide only and is subject to change without notice. This document is not to be regarded as a guarantee of performance.  Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. © 2011 Tallysman Wireless Inc.  All rights reserved. Rev 2.1