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Item #: HC843

HC843 Active Dual-Band GNSS + Passive Iridium Helical Antenna


Weighing only 42 g, The the lightweight and compact HC843 from Tallysman features a precision-tuned helix element that provides excellent axial ratios and operates without the requirement of a ground plane, making it ideal for a wide variety of applications, including unmanned aerial vehicles (UAVs).

SKU: 33-HC843-25 Categories: , Manufacturer: Tallysman Wireless

Tallysman HC843 Active Dual-Band GNSS + Passive Iridium Helical Antenna

The HC843 helical antenna from Tallysman is designed for precision positioning, covering the GPS/QZSS-L1/L2, GLONASS-G1/G2, Galileo-E1, and BeiDou-B1 frequency bands, including SBAS available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)]. The HC843 is switchable between the passive Iridium and the active GNSS antenna: an input voltage lower than 5.2 VDC engages the GNSS antenna, while an input voltage of 5.5 VDC and above invokes the passive Iridium antenna. The HC843 features low current, low-noise amplifier (LNA) that includes an integrated low-loss pre-filter to prevent harmonic interference from high-amplitude signals, such as 700 MHz band LTE and other nearby in-Band cellular signals.


  • Low noise preamp (3.0 dB typ.)
  • Axial ratio (≤ 0.5 dB at zenith)
  • LNA gain (25 dB typ. | 24 dB min.)
  • Low current (GNSS: 23 mA typ. | Iridium: 3.6 mA typ.)
  • ESD circuit protection (15 kV)
  • Invariant performance from 2.5 to 16 VDC
  • GNSS-mode: 2.5 to 5.0 VDC
  • Iridium-mode: 5.5 to 16 VDC
  • IP67, REACH, and RoHS compliant


  • Extremely lightweight (42 g)
  • Ideal for RTK and PPP surveying systems
  • Great multipath rejection
  • Increased system accuracy
  • Excellent signal-to-noise ratio
  • Industrial temperature range
  • Rugged design, ideal for harsh environments

HC843 Mechanical Drawing

All dimensions denote millimeters

HC843 Active Dual-Band GNSS + Passive Iridium Helical Antenna Datasheet

Tallysman Connector and Cable Options

Tallysman offers a number of connector and cable options for its antennas. Use the guide below to find the available options for your antenna or contact us for help.

Tallysman Part Number Ordering Guide

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