Beitian BT-602/BT-603 Helical GNSS Antenna SMA-J for Drone RTK GPS/BeiDou/GLONASS/Galileo
Beitian BT-602/BT-603 Helical GNSS Antenna SMA-J for Drone RTK GPS/BeiDou/GLONASS/Galileo
Beitian
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Overview
The Beitian BT-602 / BT-603 is a helical GNSS antenna designed for drone RTK and other satellite navigation receiver applications. Two models are available with different supported satellite bands/systems: BT-602 and BT-603.
Key Features
- Four-system GNSS signal support (model-dependent working modes)
- Right-hand circular polarization (RHCP)
- 360° horizontal coverage angle
- SMA-J connector, 50 Ω port impedance
- Compact size and lightweight design (Φ40*84.5 mm, ≤60 g)
- Operating voltage: 3.3-12.0 V; operating current: ≤50 mA
- UV-resistant PC material (UV Material)
- Mounting: 3 x M2.5 threaded holes
Specifications
GNSS Working Modes (by model)
| Model | Working mode |
|---|---|
| BT-602 | GPS L1/L2; GLONASS L1/L2; BDS B1I/B1C/B2I/B2a/B2b/B3I; GALILEO E1/E5b; L-Band |
| BT-603 | GPS L1/L2/L5; BDS B1/B2/B3; GLONASS L1/L2/L3; GALILEO E1/E5a/E5b/E6; ABAS L1/L5; QZSS L1/L2/L5/L6; IRNSS L5; L-Band |
Antenna / Electrical / Environmental
| Gain (dBi) | 3.5 |
| LNA Gain (dB) | 36±2 |
| Noise figure (dB) | ≤2 |
| VSWR | ≤2 |
| Output VSWR | ≤2 |
| Port impedance | 50 Ω |
| Polarization | Right-hand circular polarization |
| In-band flatness (dB) | ±2 |
| Operating voltage (V) | 3.3-12.0 |
| Operating current (mA) | ≤50 |
| Differential propagation delay (ns) | ≤5 |
| Antenna AR (dB) | ≤3 |
| Horizontal coverage angle | 360° |
| Phase center error (mm) | ±2 |
| Operating temperature | -40°C to +70°C |
| Storage temperature | -55°C to +85°C |
Mechanical
| Connector type | SMA-J |
| Antenna size | Φ40*84.5 mm |
| Antenna weight | ≤60 g |
| Product dimension (detailed) | Φ40.0 ±0.3 mm; length 84.5 ±0.3 mm; Φ26.6 ±0.1 mm |
| Mounting | 3 x M2.5 threaded holes |
What's Included
Package contents vary by selection. The following configurations are shown:
- Single spiral set: BT-603 Four-Star Full Range x1
- Single spiral set with base: BT-603 + BT-M61AJ5 x1 + SMA-J connector 5-meter cable
- Spiral set meal: BT-902G2 + BT-603 + SMA Male to Female Cable + Two single-ended connecting wires + PL2303HXD USB Debug Cable
Applications
- Drones
- Handheld terminal devices
- Small RTK equipment
- Tracking and positioning
- Autonomous driving (positioning systems)
- Scientific research testing
- Wireless communication related positioning setups
For integration and compatibility questions (connector/cable selection, receiver matching, or model choice BT-602 vs BT-603), contact [email protected] or visit https://rcdrone.top/.
Details
Built for drone RTK and other positioning receivers, the BT-602/BT-603 helical antenna supports multi-band GNSS (model dependent) with RHCP polarization.
Specifications and support options are summarized for quick selection between BT-602 and BT-603 configurations.
Multi-constellation reception helps maintain stable tracking across GPS, BDS, GLONASS, GALILEO and other supported systems depending on the model.
Compact Φ40×84.5 mm housing keeps weight down while the UV-resistant shell supports long-term outdoor use.
SMA-J connectivity and three M2.5 mounting points simplify integration into custom drone and RTK enclosures.
Common use cases include drones, small RTK equipment, tracking/positioning systems, and research test setups.
Wiring and test references help plan receiver integration, including base/rover RTK positioning module connections.
Choose a single antenna, a set with base and 5 m SMA cable, or a full kit with receiver board and accessories based on your build.
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