TW4421 Wideband Dual Feed GPS/GLONASS Antenna
The TW4421 by Tallysman Wireless is a low cost
dual feed GPS & GLONASS magnetic mount antenna
covering the GPS L1, GLONASS G1, and SBAS (WAAS,
EGNOS & MSAS) frequency band (1574 to 1606
MHz). The TW4421 features a novel 25mm dual feed
wideband patch element that provides excellent
multipath rejection and a more linear carrier phase
response by virtue of the axial ratio that is greatly
improved across the full frequency bandwidth. It is
especially suitable for high accuracy applications, and
also offers 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 IP67 magnetic mount enclosure. It is
available with a wide range of connector options.
Applications
Cost Sensitive Mission Critical Positioning
Military & Security
Covert surveillance
Fleet Management & Asset Tracking
Features
Dual feed patch element
40% wider bandwidth, small footprint
Axial ratio: 3 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
IP67 weather proof housing
Low Power: 9mA typ. at 2.3Vcc min.
Benefits
1dB Bandwidth Includes GPS-L1 & GLONASS
Greatly enhanced multipath rejection
improved GNSS reliability
Excellent signal to noise ratio
RoHS compliant
Ideal for harsh environments
Excellent out of band signal rejection
TW4421 Wideband Dual Feed GPS/GLONASS Antenna
Specifications
Antenna
Architecture
1 dB radiated power bandwidth (RHCP)
Antenna Gain (with 100mm ground plane)
Axial Ratio over Bandwidth (over full bandwidth)
Polarization
Architecture
Filtered LNA Frequency Bandwidth
Gain
Gain flatness
Out-of-Band Rejection
VSWR (at LNA output)
Noise Figure
Supply Voltage Range (over coaxial cable)
Supply Current
ESD Circuit Protection
Wideband Dual Feed Patch Element
32 MHz
4.5 dBic
<2dB typ. 3dB max.
RHCP
Dual Feed Patch -> Hybrid->LNA stage 1 -> SAW filter-> LNA stage 2
1575 to 1606 MHz
28dB min, 1575 MHz to 1606MHz
+/- 2dB, 1575 MHz to 1606MHz
<1500MHz
>32dB
<1550MHz
>25dB
>1640MHz
>35dB
<1.5:1
1.0dB typ.
+2.5VDC to 16VDC nominal (12VDC recommended maximum)
10mA typ. 15mA max. (@ 85°C)
15KV air discharge
Electrical
Mechanicals & Environmental
Mechanical Size
Cable
Operating Temp. Range
Enclosure
Weight
Attachment Method
Environmental
Shock
Vibration
Warranty
38mm x 38mm dia. x 14.3mm High
RG174
-40°C to +85°C
Radome and base: ASA plastic
50gm (Enclosure + SMA connector 34gm, cable 0.31gm/cm)
Magnetic,
IP67 and RoHS compliant
Vertical axis: 50G, other axes: 30G
3 axis, sweep = 15 min, 10 to 200Hz sweep: 3G
One year, parts and labour
Ordering Information
Legacy Part Numbers:
TW4421 – GPS/GLONASS Antenna
32-4421-xx-yyyy
Connector: xx = 00 SMA male ,
01 = TNC male
02 = MCX male
03 = MMCX male 04 = SMB male
05 = MCX right angle male
06 = MMCX right angle male 07 = SMA female
08 = H.FL**
09 = U.FL
10 = SMA R/A**
11 = Reverse polarity SMA**
** Premiums apply. Please contact your Distributor
Cable length: yyyy = cable length in mm
* 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.
TW4421 – Wideband GPS Antenna
33-4421-xx-yyyy
Please refer to the Ordering Guide
(http://www.tallysman.com/orderingguide.php)
for the current and complete list of available radomes
and 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. © 2010
Tallysman Wireless Inc. All rights reserved.
Rev 2.1
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