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Compact Choke Ring GNSS Antenna for GPS, BDS, GLONASS & Galileo
A full-band choke ring GNSS antenna built for millimeter-level positioning, with a stable phase center and outstanding multipath suppression in a body one quarter the size and weight of conventional 3D choke ring antennas.
- Wide frequency range and excellent signal coverage
- Compact size and lightweight design
- Millimeter-level accuracy with a stable phase center
- Choke ring structure for excellent multipath suppression
- High out-of-band rejection and anti-interference capability
Choke Ring GNSS Antenna Overview
This compact full-band choke ring GNSS antenna covers BDS, GPS, GLONASS and Galileo, meeting the demand of modern surveying equipment for high precision and multi-system compatibility. Its choke ring structure suppresses multipath reflections at the antenna, which makes it a trusted choice for CORS reference stations and other precision GNSS installations.
It is widely used in high-precision applications such as geodetic surveying, marine surveying, channel surveying, dredging surveying, seismic monitoring, bridge deformation monitoring, landslide monitoring and automated terminal operations.
Key Features of the Choke Ring GNSS Antenna
Full-Band, Multi-System Signals
Fully supports GPS, GLONASS, Galileo and BDS, plus QZSS, India's IRNSS regional system, SBAS and L-Band augmentation services.
Millimeter-Level Positioning Accuracy
Phase center accuracy at the millimeter level, with high phase center stability and good repeatability for geodetic-grade results.
Excellent Anti-Multipath Capability
The unique 3D choke ring structure effectively suppresses multipath interference across a wide range of application scenarios.
Strong Anti-Interference Performance
The LNA offers excellent out-of-band rejection, suppressing unwanted electromagnetic signals and reducing the risk of loss of lock.
Compact and Lightweight
Φ185 × 148 mm and no more than 1.8 kg, roughly one quarter the size and weight of existing 3D choke ring antennas.
Excellent Satellite Reception
High gain and strong low-elevation tracking keep GNSS output stable in complex environments with tree or building obstruction.
Rugged and Reliable Structure
Waterproof, dustproof design with fully sealed core components, IP67 protection and an MTBF above 30,000 hours.
Certified Performance
Passed OTA performance testing at authoritative laboratories, plus environmental testing and CE/FCC certification.
Wide Operating Range
Operates from -40°C to +85°C and 95% non-condensing humidity for stable long-term service in harsh conditions.
3D and 2D Choke Ring GNSS Antenna Structure
The choke ring structure is what separates a geodetic choke ring GNSS antenna from an ordinary survey antenna. Concentric rings around the radiating element attenuate low-angle and surface-reflected signals before they reach the antenna, so the receiver tracks cleaner satellite signals and the phase center stays stable.
This compact model uses a 3D choke ring design to deliver strong multipath suppression while keeping the body far smaller and lighter than traditional 3D choke ring antennas, which simplifies transport, installation and mounting.
Choke Ring GNSS Antenna Specifications
| Antenna Characteristics | |
|---|---|
| Frequency Range | GPS L1/L2/L5 BDS B1I/B2I/B3I/B1C/B2a/B2b GLONASS L1/L2/L3 GALILEO E1/E5a/E5b/E6 QZSS L1/L2/L5/L6 IRNSS L1/L5 L-Band |
| Impedance | 50 Ω |
| Polarization | Right-hand circular polarization |
| Antenna Axial Ratio | ≤ 3 dB |
| Horizontal Coverage Angle | 360° |
| Output VSWR | ≤ 2.0 |
| Maximum Gain | 6.5 dBi |
| Phase Center Error | ±1 mm |
| LNA Specifications | |
|---|---|
| Gain | 50 ± 2 dB |
| Noise Figure | ≤ 2 dB |
| Output VSWR | ≤ 2.0 |
| In-Band Flatness | ±2 dB |
| Operating Voltage | +3.3 ~ +12 VDC |
| Operating Current | ≤ 60 mA |
| Differential Transmission Delay | ≤ 5 ns |
| Mechanical Characteristics | |
|---|---|
| Antenna Dimensions | Φ185 × 148 mm |
| Weight | ≤ 1.8 kg |
| Connector Type | TNC female |
| Mounting Method | 5/8" × 11 threaded mounting hole |
| Operating Environment | |
|---|---|
| Waterproof & Dustproof Rating | IP67 |
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -55°C ~ +85°C |
| Humidity | 95% non-condensing |
Applications
From geodetic control networks to deformation monitoring, this choke ring GNSS antenna delivers stable, high-accuracy positioning wherever multipath and interference threaten data quality.
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