Hemisphere GNSS A21/A31 Antenna
Multi-Constellation GNSS Antennas for Precision Positioning
Hemisphere GNSS A21 / A31 Antenna is designed for precision GNSS positioning, supporting GPS, GLONASS, BeiDou, Galileo, SBAS, and L-Band signals. With advanced multi-path mitigation and 30 dB noise filtering, they ensure reliable signal tracking even in challenging environments. Housed in IP69K-rated enclosures, these antennas are ideal for use with Hemisphere GNSS Crescent® and Crescent Vector™ II receivers, providing durability and superior performance.
A21/A31 Antenna Technical Specifications
| A21 | A31 |
GNSS Reception | GPS L1, GLONASS G1, BeiDou B1, Galileo E1, SBAS, and L-band | GPS L1, GLONASS G1, BeiDou B1, Galileo E1, SBAS, L-band, and Beacon |
L-Band Frequency | 1.525 - 1.614 GHz | 1.525 to 1.614 GHz |
Beacon Frequency | - | 283.5 - 325 KHz |
Input Voltage | 3.3 to 12 VDC | 5 to 12 VDC |
Input Current | 24 mA, typical | 50 - 60 mA |
Enclosure | Aluminum base with ASA plastic top | Lexan |
Dimensions | 7.0 H x 13.0 D (cm) 2.9 H x 5.1 D (in) | 10.4 H x 14.5 D (cm) 4.1 H x 5.7 D (in) |
Weight | 0.38 kg (.84 lbs) | 0.73 kg (1.62 lbs) |
Mount | 5/8 inch female thread | 1” coarse thread (5/8” adapter available) |
RF Connector | TNC (straight) | TNC |
What Is the A21/A31 Antenna Used For?
Typical applications of the A21/A31 Antenna include:
RTK and high-precision positioning for autonomous machines
UAV, drone and robotics navigation
Automotive testing, telematics and fleet tracking
Marine navigation and heading systems
Surveying, mapping and precision agriculture
Frequently Asked Questions
What is the A21/A31 Antenna?
Hemisphere GNSS A21 / A31 Antenna is designed for precision GNSS positioning, supporting GPS, GLONASS, BeiDou, Galileo, SBAS, and L-Band signals. With advanced multi-path mitigation and 30 dB noise filtering, they ensure reliable signal tracking even in challenging environments.
Which GNSS signals does the A21/A31 Antenna support?
Supported constellations and frequency bands are listed in the specifications table above. Matching the antenna to your receiver’s supported signals is the key selection criterion — contact Leo Drive if you need help pairing the A21/A31 Antenna with your GNSS receiver.
Where is the A21/A31 Antenna available?
The A21/A31 Antenna is available through Leo Drive in the following region: Turkey. For other regions, please contact Leo Drive.
How can I get the datasheet and technical documents for the A21/A31 Antenna?
The datasheet, user manual and other technical documents for the A21/A31 Antenna are available on the manufacturer’s website. You can also contact Leo Drive for documentation and integration support.
Explore More at Leo Drive
The A21/A31 Antenna is part of the GNSS Antennas range at Leo Drive. Browse all autonomous vehicle sensors and components, or talk to our engineering team about integration in your project.
