33-2408-05-0150

## Tallysmani 

A Tallysman _Accutenna[®]_ Antenna TW2406/TW2408 Embedded GPS/GLONASS Antenna 

The TW2406 / TW2408 is electronically identical to the TW2405 / TW2407.  The TW2406 / TW2408 has a larger PCB with drilled holes for more secure mounting. 

The TW2406/TW2408 employs Tallysman’s unique _Accutenna_ technology covering the GPS L1, GLONASS L1 and SBAS (WAAS, EGNOS & MSAS) frequency bands (1574 to 1606 MHz).  It is especially designed for precision industrial, agricultural and military OEM applications.  It provides truly circular response over its entire bandwidth thereby producing superior multipath signal rejection. 

The TW2406/TW2408 features a dual-feed wideband patch element, with a two stage Low Noise Amplifier, comprised of one input LNA per feed, a mid section SAW to filter the combined output, and a final output gain stage. This configuration provides excellent axial ratio that is constant across the full frequency band. A tight pre-filter is available with part number TW2408 to protect against saturation by high level sub-harmonics and L-Band signals. 

The TW2406 /TW2408 comes in a compact circular form factor with a built-in 56 mm diameter ground plane. 

## **Applications** 

- High Accuracy & Mission Critical GPS 

- Precision Agriculture, Mining & Construction 

- Military & Security 

- Avionics 

- Law Enforcement & Public Safety 

- Fleet Management & Asset Tracking 

## **Features** 

- Great axial ratio: ≤1dB typ. 2 dB max. 

- Low noise LNA: 1 dB 

- High rejection SAW filter 

- High gain:  28 dB typ. 

- Low current: 10 mA typ. 

- ESD circuit protection: 15 KV 

## **Benefits** 

   - Excellent multipath signal rejection 

   - Increased system accuracy 

   - Excellent signal reception 

   - Great out of band signal rejection 

   - Compact form factor 

   - RoHS compliant 

- Wide voltage input range: 2.5 to 16 VDC 

## Tallysman 

## TW2406/TW2408 Embedded GPS/GLONASS Antenna **Specifications** Vcc = 3V, over full bandwidth, T=25°C 

## **Antenna** 

Architecture 0.5 dB Bandwidth Antenna Gain (with 100mm ground plane) Axial Ratio 

Dual, Quadrature Feeds 31 MHz 4.25 dBic ≤1dB typ. 2 dB max. 

## **Electrical** 

Architecture 

(TW2408) Filtered LNA Frequency Bandwidth Polarization Gain 

Gain flatness Out-of-Band Rejection <1500 MHz <1550 MHz >1640 MHz 

VSWR (at LNA output) Noise Figure Supply Voltage Range (over coaxial cable) Supply Current ESD Circuit protection 

One LNA per feed line, mid section SAW filter (TW2406) One SAW Filter & LNA per feed line, mid-section SAW filter 

1574 to 1606 MHz RHCP 28 dB min., 1575.42 to 1606 MHz (TW2406) 25 dB min, 1575.42 to 1606 MHz (TW2408) +/- 2 dB, 1575 to 1605 MHz >32 dB (TW2406) >50dB (TW2408) >25 dB (TW2406) >50 dB (TW2408) >35 dB (TW2406) >70 dB (TW2408) <1.5:1 typ.  1.8:1 max. 1 dB typ.(TW2406) <3.5 dB typ. (TW2408) +2.5 to 16 VDC nominal (12 VDC recommended maximum) 15 mA typ, 25mA Q max (85°C). 15 KV air discharge 

## **Mechanicals & Environmental** 

Mechanical Size 56 mm dia. x 7.8 mm H Cable RG174 Operating Temp. Range -40 to +85°C Weight 38 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 

## **Ordering Information** 

TW2406:  33-2406-xx-yyyy-zz 

TW2408:  33-2408-xx-yyyy-zz 

Where xx = type of connector  yyyy = cable length in mm and zz = reserved for Tallysman’s use 

Please refer to the Ordering Guide (http://www.tallysman.com/wp-content/uploads/Current-Ordering-Guide.pdf ) for the current and complete list of available connectors. 

## **Tallysman Wireless Inc** 

36 Steacie Drive Ottawa ON K2K 2A9 Canada Tel +1 613 591 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 1.3