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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

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