TW4421 Single Band GNSS Antenna





Surface Mount / Magnet / Adhesive

Amplifier Gain

28 dB typ.

Connector Options

Many Options, Please Inquire


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The TW4421 employs Calian’s unique Accutenna® technology, covering GPS/QZSS L1, GLONASS G1, Gas well as SBAS (WAAS/EGNOS/MSAS).


  • Dual-feed patch element
  • Axial ratio: 2.5 dB max.
  • 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
  • IP67 compliant weatherproof housing
  • Low Current: 9mA typ.


  • 1 dB Bandwidth
  • Greatly enhanced multi-path rejection
  • Improved GNSS reliability
  • Excellent signal to noise ratio
  • RoHS compliant
  • Ideal for harsh environments
  • Excellent out of band signal rejection


Ideal for high accuracy applications while providing high out of band signal rejection, the TW4421 is the smallest dual feed, high performance antenna available, providing truly circular response over its entire bandwidth thereby producing superior multi-path signal rejection.

The TW4421 features a novel 25mm dual feed wide band patch element that provides a more linear carrier phase response by virtue of the axial ratio that is greatly improved across the full frequency bandwidth.

The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wide-band LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output.

The TW4421 is housed in a compact IP67 compliant enclosure that can be surface mounted via magnet, screws or adhesive material.

LNA Pre-filter Available
If you need enhanced protection against high level sub-harmonic signals like LTE and near frequency signals such as WiFi, the alternative TW4422 provides these additional benefits with an LNA pre-filter. Click here to learn more about the TW4422.


TW4xxx Housed Drawing
Dimensions in Millimeters