Product Description

TW1421 Dual Feed Embedded GPS/GLONASS Antenna

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

specifications︰ 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

Advantages︰ 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

Export Markets︰ UAV

Pricing︰ 1

Payment Details︰ T/T

Min Order︰ 100pcs

Ship Date︰ 4 WEEK

Standard Met︰ ISO

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