33-HC977-28

## HC977 

## **HC977 Triple-band Helical Antenna + L-band** 

**GNSS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, BeiDou-B1/B2/B2a, NavIC-L5 Frequency Coverage: + L-band correction services** 

The HC977 helical antenna is designed and crafted for precision positioning, covering the GPS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, 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. 

Weighing only 42 g, the lightweight and compact HC977 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 HC977 features an industry-leading low current, low-noise amplifier (LNA) that includes an integrated low-loss pre-filter to prevent harmonic interference from highamplitude signals, such as 700 MHz band LTE and other nearby in-band cellular signals. 

All Tallysman® helical antenna elements are protected by a robust military-grade IP67compliant 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 HC977 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. 

*The HC977 replaces the HC975. 

## **Applications** 

- Autonomous unmanned aerial vehicles (UAVs) 

- Precision GNSS positioning 

- Precision land survey positioning 

- Mission-critical GNSS timing 

- Network timing and synchronization 

- Sea and land container tracking 

- Fleet management and asset tracking 

- Marine and avionics systems 

## **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 

- Law enforcement and public safety 

**About Tallysman:** With global headquarters and manufacturing in Ottawa, Canada, Tallysman is a leading manufacturer of high-precision antennas and components for Global Navigation Satellite System (GNSS) applications. Tallysman’s mission is to support the needs of a new generation of positioning systems by delivering unprecedented antenna precision at competitive prices. Learn more at **www.tallysman.com** 

**Contact us: info@tallysman.com T: +1 613 591-3131** 

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## **HC977 Triple-band Helical Antenna + L-band** 

**Frequency Coverage:** 

**GNSS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, BeiDou-B1/B2/B2a, NavIC-L5 + L-band correction services** 

**Low Noise Amplifier (LNA)  - Measured at 3.0 VDC and 25- Measured at 3.0 VDC and 25** ° **C** 

**Antenna Low Noise Amplifier (LNA)  - Measured at 3.0 VDC and 25- Measured at 3.0 VDC and 25** ° **C Technology** Triple-frequency, RHCP quadrifilar helix **Frequency Bandwith Out-of-Band Rejection Gain Axial Ratio** dBic typ. at Zenith dB at Zenith **> 63 dB @ < 1000 MHz Lower Band 1160 - 1255 MHz > 38 dB @ < 1100 MHz GNSS > 57 dB @ < 1325 MHz L1** 2.5 ≤ 0.5 **GPS / QZSS L2** 2.0 ≤ 0.5 **L-band corrections services 1539 - 1559 MHz L5** 1.0 ≤ 0.5 **> 36 dB @ < 1400 MHz G1** 1.5 ≤ 0.5 **> 44 dB @ < 1450 MHz Upper Band 1559 - 1606 MHz GLONASS G2** 1.1 ≤ 0.5 **> 28 dB @ > 1700 MHz G3** 2.6 ≤ 0.5 **E1** 2.5 ≤ 0.5 **E5a** 1.1 ≤ 0.5 **Architecture** Pre-filter → LNA **Galileo E5b** 2.2 ≤ 0.5 **Gain** 28 dB typ. or 35 dB typ. **E6** - - **Noise Figure** 1.6 dB typ. **B1** 2.5 ≤ 0.5 **VSWR** < 1.5:1 typ. | 1.8:1 max. **B2** 2.7 ≤ 0.5 **Supply Voltage Range** 2.2 to 16 VDC **BeiDou B2a** 1.0 ≤ 0.5 **Supply Current** 15 mA typ. (28 dB) | 21 mA typ. (35 dB) **B3** - - **ESD Circuit Protection** 15 kV air discharge **IRNSS / NavIC L5** 1.0 ≤ 0.5 **P 1dB Output** 22.7 dBm @ L1 | 25.1 dBm @ L2/L5 **QZSS L6** - - **Group Delay Variation** 2 ns @ L1  |  5 ns @ L2 **L-band correction services** 1.5 ≤ 0.5 **Satellite Communications Mechanical Diagram Iridium** - - **Globalstar** - - **Phase Centre Phase Centre Variation (PCV)** ± 3.0 mm (all freq.) ~~=~~ **Phase Centre Offset (PCO)** 32 mm @ L1 |37 mm @ L2/L5 **Mechanicals Mechanical Size** 44.2 mm (dia.) x 62.4 mm (h.) **Weight** 42 g | ~~——~~ **Available Connectors** SMA of; **Radome / Enclosure** Radome and Base: EXL9330 **Mount** 3 M2.5 screws **Environmental Operating Temperature** -40 °C to + 85 °C **Storage Temperature** -50 °C to + 95 °C MIL-STD-810E - Test method 514.5 **Random Vibration** 4 hours per axis (x, y, z) at 3.674 Grms **Shock and Drop** - **Ordering Information** - **Salt Fog Part Number 33-HC977-xx IP Rating (housing)** IP67 **Compliance** IPC-A-610, FCC, RED / CE Mark, RoHS, REACH where xx = gain (28 or 35 dB) **Warranty:** Please refer to our **Ordering Guide** to review available radomes and connectors at: **Parts and Labour** 3-year standard warranty **https://www.tallysman.com/resource/tallysman-ordering-guide/** 

© 2019 Tallysman Inc. All rights reserved. Tallysman, the “When Precision Matters” tag line and the Tallysman logo are trademarks or registered trademarks of Tallysman Inc. and/or its affiliates in Canada and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The information presented is subject to change without notice. Tallysman assumes no responsibility for any www.tallysman.com errors or omissions in this document. Tallysman Wireless Inc. hereby disclaims any or all warranties and liabilities of any kind. fe 

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