ST65-4CH Ultra-Miniature 4-Channel GNSS Anti-Jamming Module

1. Product Presentation

The ST65-4 CH is an ultra-miniaturized satellite navigation anti-interference all-in-one machine designed for the needs of small and medium-sized UAVs and other industries. It supports anti-broadband interference capabilities and positioning functions for Beidou B1 and GPS L1 frequency point signals. The device features an internally integrated antenna array, anti-jamming components, and a satellite navigation receiver. It is characterized by its miniaturization, lightweight design, and low cost.

2. Product Functions

• RNSS Signal Reception
  • Capable of receiving RNSS signals from navigation satellites such as Beidou-3 and GPS.
  • Civil codes: B1C, B1I, and GPS L1
• Anti-Interference Function
  With the anti-interference capabilities for B1 and L1 frequency points, it can suppress narrowband interference, broadband interference, pulse interference, sweep interference, Gaussian interference, and other types of suppression interference.
• Software Upgrade
  The software upgrade function allows the anti-interference module and the receiver module to be upgraded through the serial port.
• System Self-Inspection
  Equipped with self-check and status inspection functions.
• Anti-Burning Function
  Continuous power resistance is not less than 10W.

3. Electrical Performance

• Frequency of Work: B1I: 1561.098MHz; L1/B1C: 1575.42MHz
• Anti-Interference Performance
  • Unidirectional interference ≥ 95dBc
  • Two-direction interference ≥ 85dBc
  • Three-direction interference ≥ 80dBc
• Positioning Accuracy
  • Horizontal accuracy: 10 meters
  • Vertical accuracy: 15 meters
• Speed Measurement Accuracy: 0.2 m/second (95%)
• Time-Giving Accuracy: ≤100ns (95%)
• Operating Voltage: Input voltage: 5 to 17 V (12V recommended)
• Power Consumption: ≤6W

4. Interface Definition

4.1. Power Supply / Data Interface (J30J-9ZKP)

The J30J-9 ZK core connector is selected, and the pin is defined as follows:

4.2. RF Interface

• Anti-interference signal output interface (reserved), using an SMA connector.
• The signal level of the output B1 / L1 is -70 ~ -60 dBm.

5. Physical & Environmental Specifications

5.1. Structural Requirements

• Overall dimensions: 65 x 65 x 21 mm
• Weight: ≤130g
• Color: Gray

Figure 5-1. Physical Dimensions

5.2. Environmental Suitability

• Operating temperature: -40°C to +55°C
• Storage temperature: -55°C to +70°C
• Relative humidity: 96% at 40°C
• Rain resistance: Meets the requirements of GJB150A rain test

6. Connection and Installation

6.1. Connection Relationship Description

• The electrical signal connection between the product and the platform carrier is established through low-frequency data mode.
• This product includes a built-in locator, which can replace the conventional positioning terminal and antenna.

  

• In RF signal access mode, this product replaces the conventional active antenna.

  

• Note: When using a USB to TTL tool to connect to the computer, do not plug in the USB to avoid damaging the serial port.

6.2. Installation and Use

1. Fixed: Install fixation with M2 screws.
2. Supply Electricity: Use an XT30 power supply with a voltage range of 5-17V (12V recommended).
3. Data Connection:
   • Connect the DuPont line TTL serial port of this product to the flight control GNSS serial port. Use the matching data line, connecting TX to flight control RX, RX to flight control TX, and GND to GND.
   • Alternatively, use an SMA cable to connect the RF port of the product to the antenna port of the UAV locator.

7. Docking with the Flight Control Protocol

This product can output either NMEA protocol or UBlox protocol. The flight control must be set to receive one of these two protocols. Please confirm your required protocol with our technical personnel before placing an order.

8. Disclaimer

This product is designed to improve the security of satellite navigation. Please comply with relevant laws and regulations during use. Any illegal activities involving the product are prohibited.