HC843 Active Dual-Band GNSS + Passive Iridium Helical Antenna

Antennas

Coverage

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

Mount

Surface Mount / Direct Screw

Amplifier Gain

28 dB typ.

Connector Options

SMA (male)

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Overview

The HC843 helical antenna is designed for precision positioning, covering the GPS/QZSS-L1/L2, GLONASS-G1/G2, Galileo-E1, and BeiDou-B1 frequency bands, including the satellite-based augmentation system (SBAS) available in the region of operation [WAAS (North America), EGNOS (Europe), MSAS (Japan), or GAGAN (India)]. The HC843 also supports
communications over voice and data modems on the Iridium™ frequency band (1616.0 – 1626.5 MHz).

Features

  • Very low noise preamp (2.0 dB typ.)
  • Axial ratio (≤ 0.5 dB at zenith)
  • LNA gain (28 dB typ.)
  • Low current (15 mA typ.)
  • ESD circuit protection (15 kV)
  • Invariant performance from 2.2 to 16 VDC
  • IP67, REACH, and RoHS compliant

Benefits

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


Details

Weighing only 42 g, The the lightweight and compact HC843 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).

The HC843 is switchable between the passive Iridium and the active GNSS antenna: an input voltage lower than 5.5 VDC engages the GNSS antenna, while an input voltage above 5.5 VDC invokes the passive Iridium antenna.

The HC843 features an industry-leading 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.

Tallysman’s HC843 has passed a rigorous 30-hour vibration test procedure, consisting of five cycles of 2-hour tests per axis (x, y, z):
• Cycle 1: 1.05 Grms;
• Cycle 2: 1.20 Grms;
• Cycle 3: 1.35 Grms;
• Cycle 4: 3.67 Grms;
• Cycle 5: 3.67 Grms.

All Tallysman helical antenna elements are protected by a robust military-grade IP67-compliant plastic enclosure. The enclosure’s base provides two threaded inserts for secure attachment, as well as a rubber O-ring around the outer edge to seal the antenna base and its integrated SMA connector.

For mounting instructions, visit helical mounting instructions.


Drawings