33-4421-00-3000

## TW4421 

## GPS-L1/GLONASS-G1 Antenna 

**Frequency Coverage:** GPS L1 | GLONASS G1 

## Overview 

The TW4421 employs Calian's patented Accutenna® technology covering the GPS-L1, GLONASS-G1, and SBAS (WAAS, EGNOS & MSAS) frequency band (1575 to 1606 MHz). The TW4421 features a novel 25 mm (diameter) dual-feed wideband patch element that provides a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth. 

It provides truly circular response over its entire bandwidth thereby producing superior multipath signal rejection. It is especially suitable for high accuracy applications while providing high out-of-band signal rejection. The two feeds from the patch element are summed in a 90° Hybrid then input to a first stage low-noise amplifier (LNA), followed by a mid-section SAW and a second low noise gain stage. 

The TW4421 is the smallest dual-feed, high performance antenna available. It is housed in a compact IP68 magnetic or adhesive mount enclosure. It is available with a wide range of cable and connector options. 

The antenna can be ordered without the magnet. In such cases, the magnet is replaced with a plastic plug to provide a smooth under surface, with the option of ordering it with or without 1.1 mm thick doublesided VHB tape on the bottom. 

## Applications 

- Cost Sensitive Mission Critical Positioning 

- Law enforcement and public safety 

- Covert surveillance 

- Fleet management and asset tracking 

## Features 

- Dual-feed patch element 

- Axial ratio: 2 dB max. (GPS & GLONASS) 

- Low noise LNA: 1 dB 

- High-rejection mid-section SAW filter 

- High-gain (28 dB typ.) 

- Wide voltage input range: 2.5 to 16 VDC 

- IP68 weather proof housing 

## Benefits 

   - 1 dB Bandwidth Includes GPS-L1 & GLONASS 

   - Excellent multipath rejection 

   - improved GNSS reliability 

   - Excellent signal-to-noise ratio 

   - CE RED, REACH, and RoHS compliant 

   - Ideal for harsh environments 

   - Excellent out-of-band signal rejection 

- Low Power (12 mA typ. current consumption) 

About Calian: With global headquarters and manufacturing in Ottawa, Canada, Calian is a leading manufacturer of highprecision antennas and components for Global Navigation Satellite System (GNSS) applications. Calian’s mission is to support the needs of a new generation of positioning systems by delivering unprecedented antenna precision at competitive prices. Learn more at www.calian.com 

Contact us: info@tallysman.com T: +1 613 591-3131 

202407 

Revision: 

**Frequency Coverage:** GPS L1 | GLONASS G1 

## GPS-L1/GLONASS-G1 Antenna 

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Low Noise Amplifier (LNA)  - Measured at 3V and 25 ° C<br>Frequency Bandwith Out of Band Rejection<br>> 32 dB @ < 1500 MHz<br>1575 - 1606 MHz > 25 dB @ < 1550 MHz<br>> 60 dB @ > 1640 MHz<br>Architecture Non pre-filtered<br>Gain 28 dB typ., 26 dB min.<br>Noise Figure 1 dB typ.<br>VSWR < 1.5:1 typ. 1.8:1 max.<br>Supply Voltage Range 2.5 to 16 VDC nominal (12 VDC rec. max.)<br>Supply Current 12 mA typ.<br>ESD Circuit Protection 15 kV air discharge<br>P 1dB Output -<br>Group Delay -<br>PCO -<br>**----- End of picture text -----**<br>


Antenna Technology Dual-feed RHCP ceramic patch Gain Axial Ratio dBic typ. at Zenith dB at Zenith GNSS ~~a~~ L1 ~~ee~~ 4.5 ≤ 2 GPS / QZSS ~~a~~ L2 ~~ee~~ - - L5 - - ~~ee ee~~ G1 4.5 ≤ 2 GLONASS ~~ee~~ G2 ~~ee~~ - - ~~ee ee~~ G3 ~~ee~~ - - Gain ~~eeee~~ E1 ~~ee~~ - ~~ee~~ - E5A - - VSWR Galileo ~~ee~~ E5B ~~ee~~ - - ~~ee ee~~ E6 - ~~ee~~ - ~~ee~~ B1 - ~~ee~~ - ~~ee~~ B2b ~~ee~~ - - BeiDou ~~ee~~ B2a ~~**ee**~~ - - ~~ee ee~~ B3 - ~~ee~~ - PCO IRNSS / NavIC ~~ee~~ L5 ~~ee~~ - ~~ee~~ - ~~ee~~ QZSS L6 - - L-Band Services (1525 MHz - 1559 MHz) - - ~~ee ee~~ Satellite Communications Iridium - - Globalstar - - ~~eeee~~ Other ~ Axial Ratio at 10° - Efficiency - ~~eees~~ PC Variation - & ~~EE~~ Mechanicals ! Size 38.6 mm (sq.) x 14.7 mm (h.) Weight 34 g (without cable) Radome LEXAN™ EXL9330 Mount Adhesive, magnetic Available Connectors Please see ordering guide Environmental Operating Temperature -40 °C to +85 °C Storage Temperature -55 °C to +95 °C Vibration MIL-STD-810-G - Test Method 514.6 Shock MIL-STD-810-G - Test Method 516.6 Salt Fog MIL-STD-810-F - Test Method 509.5 IP Rating IP68 Compliance IPC-A-610, FCC, RED / CE Mark, RoHS, REACH Warranty Parts and Labour 3-year standard warranty 

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Mechanical Diagram<br>**----- End of picture text -----**<br>


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Ordering Information<br>Part Number 33-4421-xx-yyyy<br>Where xx = connector type and yyyy = cable length in mm<br>**----- End of picture text -----**<br>


Please refer to our Ordering Guide to review available radomes and connectors at: https://www.tallysman.com/resource/tallysman-ordering-guide/ 

> © 2023 Calian Inc. All rights reserved. Calian, the “Confidence. Engineered.” tag line and the Calain logo are trademarks or registered trademarks of Calian Inc. and/or its affiliates in Canada and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The information presented is subject to change without notice. Calian assumes no responsibility for any errors or omissions in this document. Calian hereby disclaims any or all warranties and liabilities of any kind. 

Revision: 202407