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Order by calling: 1.519.821.3661

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Tallysman 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 L1 and SBAS (WAAS, EGNOS & MSAS) frequency band (1574 to 1606 MHz).



The TW1421 features a novel 25mm wideband patch element with dual-feeds that are summed in a 90oHybrid 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).

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


  • High Accuracy GPS & GLONASS
  • Precision Agriculture, Mining & Construction
  • Military & Security
  • Avionics
  • Law Enforcement & Public Safety
  • Fleet Management & Asset Tracking


  • Compact Dual Feed Patch Element
  • 1dB bandwidth 1575-1606 MHz
  • Very low noise LNA: <1.25 dB
  • 3dB Axial Ratio @ zenith over bandwidth
  • LNA gain: 28 dB typ.
  • Wide Supply voltage: fixed 2.5V to 10V
  • 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

Ordering Information

TW1421T OEM Dual Feed antenna, with 2.72 mm can 32-1421T-xx yyyy-zz
TW1421S OEM Dual Feed antenna, with 1.7 mm can 32-1421S-xx yyyy-zz
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 (call for pricing)

09=U.FL, 10=SMA R/A (add $2.95 to unit price), 11=Reverse polarity SMA (add $5.00 to unit price)

Cable length: yyy = cable length in mm
Custom Tuning: zz = Assigned by Tallysman


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