The lightweight HC977 is a triple-band helical antenna designed and crafted for precision positioning and covers the GPS / QZSS – L1 / L2 / L5, GLONASS – G1 / G2 / G3, Galileo – E1 / E5a / E5b, and BeiDou-B1 / B2 / B2a frequency bands, as well as L-band correction services.
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 of the HC977 Triple-Band Helical Antenna
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
The Tallysman HC977 is light weight (Just 42 g) and compact. It features a precision tuned helix element. As a result it provides excellent axial ratios while operating without the need of a ground plane. It is ideal for a variety of uses such as UAVs.
The HC977 features an industry-leading low current, low noise amplifier (LNA) that 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 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 enclosure also provides three threaded holes in the base for secure attachment of the unit.