Beitian BT-35A/BT-35B External GNSS Antenna 28±2dB SMA-J RG174 3m for Car & Marine Navigation
Beitian BT-35A/BT-35B External GNSS Antenna 28±2dB SMA-J RG174 3m for Car & Marine Navigation
Beitian
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Overview
The Beitian BT-35 series is an external GNSS antenna with an integrated LNA, designed for multi-constellation positioning (GPS/BDS/GLONASS/Galileo). It is available in two mounting variants: BT-35A (magnetic bottom) and BT-35B (double-sided tape). With an SMA-J connector and RG174 cable, it is suitable for automotive navigation and marine tracking installations where stable signal reception is required.
Key Features
- Working mode: BDS B1 / GPS L1 / GLONASS L1 / GALILEO E1
- LNA gain: 28±2dB
- Low VSWR: <1.5
- Polarization: RHCP (right-handed circular)
- 360° horizontal coverage angle
- Connector: SMA-J; Cable: RG174; Cable length: 3m
- Mounting options: magnetic bottom (BT-35A) or double-sided tape (BT-35B)
Specifications
Receiving Frequency Range / Bands
| BDS B1 | 1561MHz |
| GPS L1 | 1575.42MHz (also shown as 1575MHz) |
| GLONASS L1 | 1602MHz |
| GALILEO E1 | 1575.42MHz |
Ceramic Antenna Characteristics
| Gain | 2dBi |
| Output VSWR | <1.5 |
| Impedance | 50Ω |
| Polarization | RHCP |
| Axis ratio | <3dB |
| Horizontal coverage angle | 360° |
LNA Specification
| LNA Gain | 28±2dB |
| Noise figure | <2dB (Only LNA) |
| Output VSWR | <1.5 |
| Output impedance | 50Ω |
| Passband ripple | ±2.0dB (Only LNA) |
| Supply voltage | 2.8V-5.0V (also shown as 3.0-5.0V) |
| Supply current | ≤20mA |
Environment
| Operating temperature | -40°C to +85°C |
| Storage temperature | -40°C to +85°C |
| Wet degree | 40% - 95% |
Mechanical / Interface
| Connector | SMA-J |
| Cable | RG174 Cable |
| Cable length | 3m (also shown as 3000±30) |
| Weight | <120g |
Model Variants
| Model | Size | Mounting |
|---|---|---|
| BT-35A | 49.5*49.5*16mm (also shown as 49.50±0.2 and 16.00±0.1) | Magnetic Bottom |
| BT-35B | 49.5*49.5*17.8mm | Double-sided tape |
What's Included
- 1 x Beitian BT-35 series external GNSS antenna (selected model: BT-35A or BT-35B)
Applications
- Car navigation
- Marine tracking / shipboard installations
- Dash cam positioning systems
- Traffic light and infrastructure timing/positioning equipment
- Measuring instruments (including acreage meters)
- Electric vehicles and unmanned vehicles
- Precision agriculture, shipbuilding industry, driving test and driver training equipment
For selection help between BT-35A (magnet) and BT-35B (tape), or to confirm your device’s antenna bias voltage and SMA-J interface requirements, contact support at https://rcdrone.top/ or email support@rcdrone.top.
Details
Choose BT-35A for a magnetic base or BT-35B for double-sided tape mounting, with the same multi-constellation L1 reception and 3m lead.
The integrated LNA and RHCP ceramic element are designed for stable reception across GPS/BDS/GLONASS/Galileo L1 bands.
SMA-J connectivity and an RG174 cable make it easy to route the antenna to your receiver while mounting the patch externally.
Core antenna specs are summarized for quick compatibility checks, including bands, impedance, polarization, and VSWR.
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