TW1421 Dual Feed Embedded GPS/GLONASS Antenna

Model:	TW1421
Brand:	Tallysman
Origin:	Made In Canada
Category:	Electronics & Electricity / Telecommunication & Broadcasting / GPS
Label:	TW1421 , GPS/GLONASS , UAV
Price:	¥1 / pc
Min. Order:	100 pc

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Product Description

The TW1421 by Tallysman Wireless is an OEM dual feed GPS & GLONASS antenna covering the GPS L1, GLONASS G1 and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz). The dual feed architecture provides a low axial ratio, a very tight Phase Centre Variation (PCV), and is especially suitable for high accuracy applications, with excellent multipath rejection and a more linear carrier phase response. It also offers high out of band signal rejection.

The TW1421 features 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 built-in 35mm circular ground plane should ideally be augmented with a local system ground plane or reflecting surface (DC connection not required).

There are two options: TW1421S which has a lower profile can, mico-coax cable, and a U.FL. connector; or TW1421T which has a taller can, RG174, and a choice of connectors.

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

Applications

Features

Benefits

High Accuracy GPS & GLONASS

UAV / UAS / Drones

Military & Security

Avionics

Law Enforcement & Public Safety

Fleet Management & Asset Tracking

Accutenna™ technology

Very tight Phase Centre Variation (PCV)

1dB bandwidth 1575-1606 MHz

Very low noise LNA: <1.25 dB

<2.5dB Axial Ratio over bandwidth

Wide Supply voltage: fixed 2.5V to 16V

ESD circuit protection: 15KV

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

Reliable performance

Specifications

Vcc = 3V, over full bandwidth, T=25°C

Antenna
Architecture	Dual, Quadrature Feeds
1 dB Bandwidth	31MHz
Antenna Gain (with 100mm ground plane)	4.5d Bic
Axial Ratio over full bandwidth (horizon to horizon)	≤2.5dB max

Electrical
Architecture	One LNA per feed line, mid-section SAW filter
Filtered LNA Frequency Bandwidth	1574MHz to 1606MHz
Polarization	RHCP
LNA Gain	28dB typ., 26dB Min, 1575.42MHz to 1606MHz
Gain flatness	+/- 2dB, 1575MHz to 1606MHz
Out-of-Band Rejection <1500 MHz <1550 MHz >1640 MHz	>32 dB >25 dB >35 dB
VSWR (at LNA output)	<1.5:1
Noise Figure	≤1.25dB typ.
Supply Voltage Range (over coaxial cable)	+2.5VDC to 16VDC nominal (12VDC recommended maximum)
Supply Current	15mA typ, 25m Max (85°C)
ESD Circuit Protection	15 KV air discharge

Mechanicals & Environmental
Mechanical Size	35 mm dia. x 7.25mm
Cable	1.38mm OD (micro-coax) or 2.6mm OD (RG174)
Operating Temp. Range	-40 to +85 °C
Weight	30 g
Attachment Method	Adhesive or M2 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
Warranty	One year, parts and labour

Ordering Information
Legacy Product Numbers
TW1421T	OEM Dual Feed antenna, with 2.72 mm can – 32-1421T-xx –yyyy-zz
TW1421S	OEM Dual Feed antenna, with 2.0 mm can – 32-1421S-xx –yyyy-zz
Connector: xx