TW3865 Embedded Dual Band GNSS Antenna



GPS L1/L2, GLONASS G1/G2, Galileo E1, BeiDou B1


OEM / Embedded

Amplifier Gain

28 dB typ.

Connector Options

Many Options, Please Inquire

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The TW3865 employs Tallysman’s unique Accutenna technology providing dual band GPS/QZSS L1 & L2, GLONASS G1 & G2, BeiDou B1, and Galileo E1 coverage and is especially designed for precision dual frequency positioning.


  • Very low Noise Preamp,
  • Axial ratio: <2dB typ.; <1 dB at Zenith
  • Tight Phase Center Variation
  • LNA Gain 28 dB typ.
  • Low current: 24 mA typ.
  • ESD circuit protection: 15 KV
  • Invariant performance from: +2.5 to 12VDC


  • Ideal for dual frequency RTK and PPP surveying systems
  • Great multipath rejection
  • Increased system accuracy
  • Great signal to noise ratio
  • RoHS and REACH compliant


The TW3865 features a precision tuned, circular dual feed, stacked patch element. The signals from the two orthogonal feeds are combined in a hybrid combiner, amplified in a wideband LNA, then band-split for narrow filtering in each band and further amplified prior to recombination at the output.

TW3865 offers excellent axial ratio and a tightly grouped phase center.

It covers GPS/QZSS L2 (1227.6 MHz), GLONASS G2 (1248 MHz centre), GPS/QZSS L1/WAAS/EGNOS/MSAS (1575.42 MHz), GLONASS G1 (1602 MHz, centre), BeiDou B1 (1575.42 MHz), and Galileo E1 (1575.42 MHz).

The OEM antenna is supplied with a standard 60 mm diameter circular ground plane, with a coaxial cable terminated with your choice of connector (right angle MCX is shown in the drawing).

Mounting holes are provided for attachment to larger ground planes. Custom tuning and ground plane options may be available, depending on purchase level commitment.


TW3xxx Embedded Drawing
Dimensions in Millimeters