HC975 Triple-band Helical Antenna + L-band

Antennas

Coverage

GPS/QZSS-L1, GPS/QZSS-L2, GPS/QZSS-L5, GLONASS-G1, GLONASS-G3, Galileo-E1, Galileo-E5a, Galileo-E5b, BeiDou-B1, BeiDou-B2, BeiDou-B2a, L-band correction services

Mount

Surface Mount / Direct Screw

Amplifier Gain

28 dB typ.

35 dB typ.

Connector Options

SMA

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Overview

The HC975 helical antenna is designed and crafted for precision positioning and covers the GPS/QZSS-L1/L2/L5, GLONASS-G1/G3, Galileo-E1/E5, BeiDou-B1/B2/B2a, and NavIC-L5 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)], as well as L-band correction services.

Features

  • Very low noise preamp: 1.6 dB
  • Axial ratio: ≤ 0.5 dB at zenith
  • LNA gain 28 dB typ. or 35 dB typ.
  • Low current: 15 mA typ. or 21 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 lightweight and compact HC975 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 HC975 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 near in-band cellular signals.

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.

Tallysman®’s HC975 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.


Drawings