Beitian BT-3B45AJL2/BT-3B45AJL5 Magnetic GNSS RTK Active Antenna for Automotive (ANN-MB-00)
Beitian BT-3B45AJL2/BT-3B45AJL5 Magnetic GNSS RTK Active Antenna for Automotive (ANN-MB-00)
Beitian
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Overview
The Beitian BT-3B45AJL2 / BT-3B45AJL5 is a magnetic GNSS RTK active antenna designed for automotive and external measurement installations. It supports multi-constellation reception (GPS/GLONASS/Galileo/BeiDou) with right-hand circular polarization (RHCP), 50 ohm impedance, and an integrated magnetic bottom for fast mounting.
Key Features
- Models available: BT-3B45AJL2 or BT-3B45AJL5
- Magnetic base; compact size and lightweight (235 g)
- Right-hand circular polarization (RHCP)
- LNA gain: 38 +/- 2 dB
- VSWR: <= 2.0
- Operating voltage: 3.3-12.0 V (also shown as 3.3-12 V)
- Horizontal coverage angle: 360 degrees
- Housing notes from product materials: matte waterproof casing; dustproof protection; scratch-resistant and non-slip matte material
- Magnet notes from product materials: neodymium iron boron strong magnet / “super magnet”
- Mounting notes from product materials: M5 mounting holes (2 holes shown)
- “Optional Buff” (wording from product materials): balancing signal strength for long-distance transmission and stability for short-range coverage
Specifications
Model / Signal Support
| Parameter | BT-3B45AJL2 | BT-3B45AJL5 |
|---|---|---|
| Supported signals (as listed) |
GPS: L1/L2/L5 GLONASS: L1/L2 BDS: B1I/B2I/B2b Galileo: E1/E5b |
GPS: L1, L1C, L5C BDS: B1I, B1C, B2a Galileo: E1, E5a QZSS: L5 IRNSS: S-L5 |
Antenna / Electrical / Mechanical
| Polarization | Right-hand circular polarization |
| Port impedance | 50 ohm |
| Gain (dBi) | 2 (also listed as >= 2.0) |
| Antenna AR (dB) | <= 3.0 |
| Phase center error (mm) | +/- 2 |
| LNA gain (dB) | 38 +/- 2 |
| Noise figure (dB) | <= 2 |
| VSWR | <= 2.0 |
| Operating voltage (V) | 3.3-12.0 |
| Operating current (mA) | <= 45 |
| Connector type | SMA-J / TNC-J (both shown in product materials) |
| Cable | RG174 |
| Cable length | 5 m (also shown as 5000 +/- 100 mm) |
| Antenna size (mm) | 100 * 68 * 24 |
| Weight (g) | 235 |
| Mounting | Magnetic bottom |
| Operating temperature (C) | -40 to +85 |
| Storage temperature (C) | -55 to +85 |
Dimension Drawing Notes (mm)
- Overall: 100.00
- Inner dimensions shown: 82.00 +/- 0.1; 68.00 +/- 0.2
- Thickness: 24.00 +/- 0.3
- Side height shown: 61.20
- Mounting holes: 2 x M5
Applications
- Automotive GNSS/RTK installations with magnetic mounting
- Geodetic surveying, hydrographic surveying, and precision agriculture (as stated in product materials)
- Surveying and mapping
For integration questions (connector selection, installation, or matching to a GNSS receiver), contact support at https://rcdrone.top/ or email [email protected].
What's Included
- 1 x GNSS RTK active antenna (model selected: BT-3B45AJL2 or BT-3B45AJL5)
Note: Some product materials also show a “Positioning Board GPS Beidou BT-902G1” as part of a separate module package; it is not indicated as included with the model-only selection.
Details
Built for vehicle and outdoor installs, the BT-3B45AJL2/BT-3B45AJL5 combines a compact magnetic mount with multi-constellation GNSS/RTK reception.
Full electrical and mechanical specifications are provided, including operating voltage range, cable length, and mounting dimensions for integration planning.
Multi-constellation tracking (GPS/GLONASS/Galileo/BeiDou) and 360° coverage help maintain reliable positioning in demanding environments.
A matte, waterproof housing and strong neodymium magnet base support quick placement on metal surfaces.
Choose the connector style that matches your receiver (SMA-J or TNC-J), with an included RG174 cable for flexible routing.
Common uses include automotive GNSS installs, surveying and mapping, power inspection workflows, and precision agriculture.
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