Home » Products » GPS and GNSS Antennas » HC977 Triple-Band Helical GNSS Antenna with L-Band Print Page

Item #: HC977

HC977 Triple-Band Helical GNSS Antenna with L-Band


The HC977 triple-band helical GNSS antenna from Tallysman supports coverage for GPS L1/L2/L5, GLONASS G1/G2/G3, Galileo E1/E5a/E5b, BeiDou B1/B2/B2a and L-Band Correction Services. It is ideal for a variety of applications, including unmanned aerial vehicles (UAVs). 

SKU: 33-HC977 Categories: , Manufacturer: Tallysman Wireless

Tallysman HC977 Triple-Band Helical GNSS Antenna with L-Band

The HC977 is a housed antenna weighing only 42 g. The lightweight HC977 triple-band helical GNSS antenna with L-Band from Tallysman features a precision-tuned helix element, providing excellent axial ratios and operates without the requirement of a ground plane, which makes it ideal for a wide variety of applications including unmanned aerial vehicles (UAVs). The HC977 is protected by a robust, military-grade plastic enclosure with an integrated SMA connector for screw-on mounting that securely seals the unit with an O-ring, complying with IP67 standards. The HC977 features an industry-leading low current, low noise amplifier (LNA) which includes an integrated low-loss pre-filter to protect against harmonic interference from high amplitude interfering signals, such as 700 MHz band LTE and other near in-band cellular signals. The enclosure also provides three threaded holes in the base for secure attachment of the unit. An embedded version is also available.


    • Autonomous unmanned aerial vehicles (UAVs)
    • Precision GNSS positioning
    • Precision land survey positioning
    • Mission-critical GNSS timing
    • Safety and security
    • Network timing and synchronization


    • Extremely lightweight (42 g)
    • Ideal for L1/L2/L5, E1/E5a/E5b RTK surveying systems
    • Great multipath rejection
    • Increased system accuracy
    • Excellent signal-to-noise ratio


    • 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

Tallysman HC977 Triple-Band Helical GNSS Antenna with L-Band Data Sheet

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

Scroll to Top