Beitian BT-304B Bluetooth GNSS/WiFi/4G 3-in-1 Full-Band Antenna for High-Precision Positioning
Beitian BT-304B Bluetooth GNSS/WiFi/4G 3-in-1 Full-Band Antenna for High-Precision Positioning
Beitian
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Overview
Beitian BT-304 / BT-304B is a 3-in-1 full-band measurement antenna that integrates GNSS, WiFi, mobile communications (4G), and Bluetooth for high-precision positioning applications such as USV platforms and other moving carriers. It is designed for multi-system, multi-band signal reception and is suitable for navigation scheduling, tracking and monitoring, and measurement/control use cases.
Key Features
- 3-in-1 integrated design: GNSS + WiFi + 4G (Bluetooth also supported per model naming)
- Multi-constellation / multi-band reception support: GPS, BDS, GLONASS, GALILEO, SBAS, QZSS, IRNSS, plus L-Band
- Right-hand circular polarization
- Low VSWR (≤2.0) and noise figure (≤2.0 dB)
- Wide operating voltage: 3.3-12.0 V
- High LNA gain: 40±2 dB
- Stable phase center design with specified phase center error ±2 mm
Specifications
| Available models (Shopify options) | BT-304; BT-304B |
Electrical Specifications (BT-304 / BT-304B)
| Parameter | BT-304 | BT-304B |
|---|---|---|
| Working mode / supported signals |
GPS L1/L2/L5 BDS B1I/B2I/B3I/B1C/B2a/B2b GLONASS L1/L2/L3 GALILEO E1/E5a/E5b/E6 SBAS L1/L5 QZSS L1/L2/L5/L6 IRNSS L5, L-Band WiFi, 4G |
GPS L1/L2/L5 BDS B1I/B2I/B3I/B1C/B2a/B2b GLONASS L1/L2/L3 GALILEO E1/E5a/E5b/E6 SBAS L1/L5 QZSS L1/L2/L5/L6 IRNSS L5, L-Band WiFi, 4G |
| Gain (dBi) | GNSS: 5.5; WiFi: 1 dBi; 4G: 0.5 dBi | GNSS: 5.5; WiFi: 1 dBi; 4G: 0.5 dBi |
| Antenna AR (dB) | ≤3.0 | ≤3.0 |
| Phase center error (mm) | ±2 | ±2 |
| Polarization | Right-hand circular polarization | Right-hand circular polarization |
| Noise figure (dB) | ≤2.0 | ≤2.0 |
| VSWR | ≤2.0 | ≤2.0 |
| Output VSWR | ≤2.0 | ≤2.0 |
| Port impedance (Ω) | 50 | 50 |
| LNA gain (dB) | 40±2 | 40±2 |
| Band flatness (dB) | ±2 | ±2 |
| Operating voltage (V) | 3.3-12.0 | 3.3-12.0 |
| Supply / operating current | ≤45 mA | ≤45 mA |
| Differential transmission delay (ns) | ≤5 | ≤5 |
| Connector type | GNSS: MCX-K; WiFi: MCX-K; 4G: MCX-K | GNSS: MCX-JW; WiFi: MCX-JW; 4G: MCX-JW |
| Cable | — | RG316 Cable |
| Cable length | — | 10 cm |
| Weight | 200 g | 200 g |
| Size | Φ128*23.6 mm | Φ128 mm*22.7 mm |
| Operating temperature | -40°C ~ +85°C | -40°C ~ +85°C |
| Storage temperature | -55°C ~ +85°C | -55°C ~ +85°C |
| Humidity / wet degree | 95% non-condensing | 95% non-condensing |
Mechanical Drawing Notes (selected dimensions)
| Product size chart tolerance | Undimensioned ±0.3 mm |
| Top-view diameter callouts | Ø128, Ø120, Ø110, Ø86, Ø71.5, Ø80.5 |
| Thickness callout (drawing) | 23.6 ±0.3 |
| Mounting / layout callouts (drawing) | 70, 42, 30, 15; 6-Ø3.5; 3-MCX-K |
Applications
- Navigation scheduling, tracking and monitoring, measurement and control
- Intelligent vehicles, container operations, special vehicles
- Precision agriculture
- Engineering surveying and slope surveying/monitoring
- Positioning and speed measurement of moving carriers in high dynamic environments
For selection help between BT-304 and BT-304B and integration guidance (connectors/cable), contact [email protected] or visit https://rcdrone.top/.
What's Included
- BT-304 antenna x1
Details
Key specifications for both options are summarized here so you can choose BT-304 or BT-304B with confidence.
A compact 3‑in‑1 antenna that combines full-band GNSS reception with WiFi and 4G connectivity for high-precision positioning.
Designed for dependable reception on moving platforms, with multi-constellation GNSS support and stable signal performance.
Wide input voltage and a high-gain LNA help maintain consistent output in demanding installation environments.
Dimensions and connectivity at a glance for planning integration into vehicles, USVs, and other carrier platforms.
Multiple MCX ports simplify routing separate GNSS, WiFi, and 4G signal paths in compact builds.
Low-profile circular housing supports flexible mounting while keeping the antenna footprint compact.
Suitable for navigation, tracking, monitoring, and measurement/control applications across industrial and mobile use cases.
Includes the antenna unit (x1); customization options may be available for project requirements.
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