33-1027-05-0150

TW1027 Low Current Embedded GPS Antenna
Applications
Battery operated monitoring
Covert Surveillance
Fleet Management & Asset Tracking
Satcom based AVL solutions
Features
Nominal 2mA current draw
Invariant response, 2.5 to 16 VDC Supply
Low Noise 1.0dB
Axial ratio: 4 dB max (GPS )
High gain: 24dB
Benefits
Longer battery life
Excellent signal to noise ratio
RoHS compliant
Excellent out of band signal rejection
The TW1027 is a very low power, compact GNSS antenna
covering the GPS L1, frequency band. This antenna features
an LNA with a nominal current consumption of just 2mA, with
constant performance from 2.5V to 15V supply voltage, and
includes protection against close proximity L-band
transmitting antennas such as Iridium™ and Globalstar™
The TW1027 has amongst the lowest power consumption
available, yet still provides 21dB nominal gain and an
excellent Noise Figure. The TW1027 patch has 40% wider
bandwidth for better axial ratio and has 15 KV ESD circuit
protection. The LNA has a +/- 10MHz bandwidth that covers
the full GPS L1 signal plus the SBAS (WAAS /EGNOS/MSAS)
frequency band (1572.5 to 1578 MHz).
The TW1027 is available with a variety of connectors and
custom cable lengths.
It is highly recommended to take advantage of Tallysman’s
custom tuning service to ensure optimal performance of this
antenna in your housing and with your ground plane.
TW1027 Dimensions (mm)
TW1027 Low Current Embedded GPS Antenna
Specifications Vcc = 3V, over full bandwidth, T=25°C
Antenna
Architecture Wideband Single Feed Patch
1 dB Bandwidth 31 MHz
10dB Return Loss Bandwidth 45MHz
Antenna Gain (with 100mm ground plane) 4.5 dBic
Axial Ratio over Bandwidth 4dB @ Fcenter
Polarization RHCP
Electrical
Architecture Patch -> LNA1->SAW -> LNA2
Gain @ 1575.42 MHz 24dB Typ, 21dB Min
Gain flatness +/- 2 dB
Out-of-Band Rejection <1500 MHz >32 dB
<1550 MHz >25 dB
>1640 MHz >35 dB
VSWR (at LNA output) <1.5:1 typ. 1.8:1 max.
Noise Figure 1 dB typ.
Supply Voltage Range (over coaxial cable) +2.5 to 16 VDC nominal (12VDC recommended maximum)
Supply Current 1.75mA typical, 2.2mA max,
Operating Supply Voltage 2.5V to 16V DC.
ESD Circuit Protection 15 KV air discharge
Mechanicals & Environmental
Mechanical Size 35mm dia. x 7.25mm
Cable RG174
Operating Temp. Range -40 to +85 °C
Attachment Adhesive or M2 screw mount
Weight 30g
Environmental RoHS and REACH 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
TW1027 Low Current Wideband GPS Antenna 33-1027-xx-yyyy
Where xx = connector type and yyyy = cable length in mm
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.
© 2010 Tallysman Wireless Inc. All rights reserved. Rev 2.1

33-1027-05-0150

Mfr. #:
Manufacturer:
Description:
RF ANT 1.575GHZ CER PATCH 15CM
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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