33-1421-00-0150

## A Tallysman _Accutenna[®]_ TW1421/TW1422 Compact Dual Feed Embedded GPS/GLONASS 

The TW1421/TW1422 employ Tallysman’s Apatented t _Accutenna[®]_ technology covering the GPS L1, GLONASS G1, and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz).  It provides truly circular response over its entire bandwidth thereby producing superior multipath signal rejection.  It also offers high out of band signal rejection. 

The antennas feature a novel 25mm wideband patch element with dual-feeds that are summed in a 90[°] Hybrid and input to a two stage Low Noise Amplifier (LNA) with a mid-section SAW a second low noise gain stage.  This configuration provides excellent axial ratio and cross-polarization rejection across the full frequency band. 

The TW1422 has a pre-filter which increases the antenna’s immunity to high amplitude interfering signals, such as LTE and other cellular signals. 

The built-in 35mm circular ground plane should ideally be augmented with a local system ground plane or reflecting surface (DC connection not required). 

The height of the RF shield (can) will be selected based upon the connector type.  Connectors which require RG174 cable will be used with the taller can.  Connectors which require mico-coax cable will be used with the shorter can. 

OEM antennas are easily detuned by the local environment. Tallysman offers custom tuning services for optimized integration into OEM end-user modules. 

## **Applications** 

- High Accuracy GPS & GLONASS 

- Precision Agriculture, Mining & Construction 

- Avionics 

- Law Enforcement & Public Safety 

- Fleet Management & Asset Tracking 

## **Features** 

- Compact Dual Feed Patch Element 

- 1dB bandwidth 1575-1606MHz 

- Very low noise LNA: <1.25 dB(TW1421) 

- <1.5 dB Axial Ratio @ zenith over bandwidth 

- LNA gain: 28 dB typ. (TW1421) 26dB typ (TW1422) 

- Wide Supply voltage: fixed 2.5V to 16V 

- ESD circuit protection: 15KV 

## **Benefits** 

   - Great multipath rejection 

   - Increase system accuracy 

   - Improved carrier phase linearity 

   - Excellent signal to noise ratio 

   - Great out of band signal rejection 

   - Compact form factor 

   - RoHS compliant 

- Temperature Compensated Gain 

## TW1421/TW1422 Dual Feed Embedded GPS/GLONASS Antenna 

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

## **Antenna** 

Architecture 1 dB Bandwidth Antenna Gain (with 100mm ground plane) Axial Ratio over full bandwidth, 

Dual, Quadrature Feeds 31MHz 4.5dBic <1.5 dB @zenith, ≤3.0dB max 

## **Electrical** 

Architecture Filtered LNA Frequency Bandwidth Polarization LNA Gain 1575.42MHz to 1606MHz Gain flatness 

Out-of-Band Rejection 

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 1574MHz to 1606MHz RHCP 28dB typ., 25dB Min, (TW1421) 26dBtyp. 23dB min (TW1422) +/- 2dB, 1575MHz to 1606MHz 

|+/- 2dB, 1575MHz to 1606MHz||
|---|---|
|TW1421|TW1422|
|<1500MHz:<br>>32dB|>60dB|
|<1550MHz:<br>>25dB|>55dB|
|>1640MHz:<br>>60dB|>65dB|
|<1.5:1 typ.  1.8:1 max||
|≤1.25dB typ.(TW1421)  3.5dBtyp (TW1422)|≤1.25dB typ.(TW1421)  3.5dBtyp (TW1422)|
|+2.5 VDC to 16 VDC nominal||
|10mA typ. 15mA max. (@ 85°C)||
|15KV air discharge||



## **Mechanicals & Environmental** 

Mechanical Size Cable Operating Temp. Range Weight Attachment Method Environmental Shock Vibration Warranty 

35mm dia. x 7.25mm 1.38mm OD (micro-coax) or 2.6mm OD (RG174) -40°C to +85°C 18g Adhesive or M2 screw mount RoHS and REACH compliant Vertical axis: 50G, other axes: 30G 3 axis, sweep = 15 min, 10 to 200Hz sweep: 3G One year – parts and labour 

## **Ordering Information** 

Part Numbers: 

TW1421 – GPS L1/GLONASS G1 antenna, 33-1421-xx-yyyy-zz TW1422 – Pre-filtered GPS L1/GLONASS G1 antenna 33-1422-xx-yyyy-zz 

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. 

36 Steacie Drive, Ottawa ON K2K 2A9 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. © 2015 Tallysman Wireless Inc. All rights reserved. Rev 4.2