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TW 4421 Wideband GPS/GLONASS Antenna
TW 4421 Wideband GPS/GLONASS Antenna
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TW4421 Wideband Dual Feed GPS/GLONASS Antenna

Item# TW4421

The TW4421 is a low-cost, dual-feed GPS & GLONASS magnetic mount antenna by Tallysman Wireless covering the GPS L1, GLONASS G1 and SBAS (WAAS, EGNOS & MSAS) frequency bands. View Full Description

Category: L1 GPS
Manufacturer: Tallysman Wireless
Tallysman Wireless


TW4421 Wideband Dual-Feed GPS/GLONASS Antenna

This low-cost dual-feed GPS & GLONASS magnetic mount antenna by Tallysman Wireless covers 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 suited to high accuracy applications; it also offers high out-of-band signal rejection.
The two feeds from the patch element are summed in a 90 degree 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 one of the smallest dual-feed, high-performance antennas available. It comes with a wide range of connector options and cable length and is housed in a compact IP67 magnetic mount enclosure.
  • Cost Sensitive Mission Critical Positioning
  • Military & Security
  • Covert surveillance
  • Fleet Management & Asset Tracking
  • 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
  • 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

TW4000 Family of Products 

Valid Connector Options

00 = SMA straight male (plug) 
01 = TNC female
02 = MCX straight male (plug) 
03 = MMCX straight male (plug) 
04 = SMB straight male (plug)
05 = MCX right angle male (plug) 
06 = MMCX right angle male (plug) 
10 = SMA Right Angle ** 
11 = Reverse polarity SMA**

12 = Waterproof SMA**
13 = SSMA **
15 = TNC male (plug) 
16 = N-Type Male** 
17 = BNC Male
18 = FME** 
19 = MMCX Female
20 = SMA Female
22 = R/A QMA**

23 = SMP**
24 = SMC Male
25 = SMC Straight Female 
26 = SMB Straight Female
27 = MCX Female Straight
28 = SSMCX Straight Plug**
29 = R/A SSMCX Plug **
30 = SMB with Overmold**
33 = MMCX straight male ** 
34x = FAKRA (replace “x” with colour code)**








Custom Cable Lengths: 0m-5m
Cable length tolerances: <1m: ±3.0mm, 1-4.9m: ±30mm, >5m: ±50mm

** Premiums apply. Please contact NavtechGPS for information and pricing.