4-Element Anti-jamming Terminal Standard Version-Dual -frequency: B1C/L1C and B3I

Product Overview

The BGS-4CH-SDV-BD-01 is a miniaturized satellite navigation anti‑jamming integrated terminal designed for civilian drones and industrial users. It integrates a 4‑element antenna array, anti‑jamming processing module, and a GNSS receiver. The terminal supports dual‑band signals from BeiDou‑2/BeiDou‑3 (B1/B3) and GPS L1, providing dual‑system, dual‑frequency anti‑jamming capability against up to 3 simultaneous jammers .
It significantly enhances PNT (Positioning, Navigation, Timing) security for drones, unmanned vehicles, and other platforms operating in complex electromagnetic environments, protecting user terminals from both unintentional and malicious attacks.

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Key Features

1. RNSS Signal Reception
- Receives BeiDou‑2, BeiDou‑3, and GPS navigation satellite signals
- Civil codes: B1C, B3I, L1C/A

2. Anti‑jamming Capability
- Supports anti‑jamming on B1C, B3I, and L1C/A dual frequency points
- Suppresses narrowband, broadband, pulse, swept, Gaussian, and other types of jamming

3. Built‑in Navigation & Positioning Module
- Full‑band positioning solution; outputs standard NMEA‑0183 protocol data (position, velocity, timing)

4. Dual Output Modes
- Serial port output (positioning data) or RF output (cleaned anti‑jammed RF signal) – flexible integration with different backend devices

5. Software Upgrade
- Field upgradeable via serial port for both the anti‑jamming module and the receiver module

6. System Self‑Test
- Power‑on self‑test and continuous status monitoring

7. Fire Resistance (High Power Survival)
- Continuous wave withstand power: ≥10 W

8. Safety Protections
- Overvoltage protection and reverse connection protection

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Electrical & Performance Specifications

| Parameter | Value |
|-----------|-------|
| Operating Frequency | BDS‑B3: 1268.52MHz ±10.23MHz<br>BDS‑B1: 1575.42MHz ±16.368MHz<br>GPS‑L1: 1575.42MHz ±16.368MHz |
| Anti‑jamming Performance | Unidirectional: ≥95dB<br>3‑direction: ≥85dB |
| Positioning Accuracy | Horizontal ≤1.5 m |
| Velocity Accuracy | ≤0.2 m/s |
| Timing Accuracy | ≤100 ns |
| Operating Voltage | 5 – 17 V DC (12 V recommended) |
| Power Consumption | ≤17 W |

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Interface Definition

Power / Data Connector (J30J‑9ZK core)

| Pin | Name | Direction | Level | Remarks |
|-----|------|-----------|-------|---------|
| 1,2 | VCC (+) | Input | 5–17 V | 12 V recommended |
| 3,4 | GND (-) | Input | – | Power ground |
| 5 | RXD0 | Input | TTL | Upgrade / receiver serial port |
| 6 | TXD0 | Output | TTL | Positioning data output (NMEA) |
| 7 | RXD1 | Input | TTL | Anti‑jamming module serial port |
| 8 | TXD1 | Output | TTL | Anti‑jamming status |
| 9 | GND | Input | TTL | Signal ground |

RF Interface
- Connector type: SMA (single coax)
- Output signal: B3/B1 band, level -70 ~ -60 dBm
- Function: Provides cleaned anti‑jammed RF signal for direct connection to a backend GNSS receiver

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Mechanical & Environmental Specifications

| Item | Specification |
|------|---------------|
| Dimensions | 150 mm × 130 mm × 26.5 mm |
| Weight | ≤500 g |
| Color | French grey |
| Operating Temperature | -40°C ~ +55°C |
| Storage Temperature | -55°C ~ +70°C |
| Relative Humidity | 96% RH at 40°C |
| Rain Test | Meets GJB150A requirements |

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Typical Application Scenarios

- Time synchronization security in power, telecommunications, and finance
- Navigation safety for drones, unmanned vehicles, and unmanned ships
- Fleet defense and navigation security
- High‑end logistics navigation safety

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Installation & Use

Mounting
Secure using M3 screws .

Power Supply
XT30 connector; input voltage 5–17 V DC (max 17 V, 12 V recommended).

Data Connection (choose one of two modes)

Mode 1: Serial output (direct connection to flight controller)
- Use the provided data cable to connect the TTL serial port to the flight controller’s GNSS serial port:
- TX → FC RX
- RX → FC TX
- GND → FC GND
- Outputs NMEA‑0183 positioning data.

Mode 2: RF output
- Connect the product’s RF port (SMA) to the drone’s antenna input port using an SMA cable.
- Important: The connected device must NOT supply more than 5 V to this RF port, otherwise damage may occur.

> ⚠️ When using a USB‑to‑TTL tool to connect to a computer, do not plug or unplug the USB while powered to avoid damaging the serial port.

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Flight Controller Protocol Compatibility

The product outputs the NMEA 0183 standard protocol, compatible with mainstream flight controllers (e.g., Pixhawk, ArduPilot) via GNSS serial port.

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Disclaimer

This product is designed to enhance satellite navigation security. Please comply with all applicable laws and regulations during use. Any illegal activities carried out using this product are not related to the product or its manufacturer.

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BGS-4CH-SDV-BD-01 – Reliable anti‑jamming navigation protection for mission‑critical applications