Avoiding the Failure of High-End Devices: Fatal Errors in AJ Terminal Installation
On modern drones and small platforms, Anti-Jamming (AJ) terminals have become the core devices for protecting navigation and positioning information. However, many users overlook critical details during installation and deployment, resulting in suboptimal terminal performance or even system failures. This article analyzes common installation errors based on practical experience and provides best practices for on-site calibration and cabling, helping professional customers avoid "traps" during AJ terminal deployment.
Error One: Phase Mismatch of RF Cables Between Antenna Elements
Why is RF Cable Phase Matching Important?
Anti-jamming antenna arrays rely on multiple antenna units working together. Accurate phase relationships of RF signals are essential for interference suppression and positioning accuracy. If the RF cable lengths or connection order between antenna elements are inconsistent, phase mismatch occurs. Phase mismatch reduces interference resistance, preventing the terminal from accurately identifying and suppressing unwanted signals.
Common Symptoms
- Significantly reduced interference suppression effectiveness
- Increased positioning deviation
- Occasional system interruptions or unstable performance
How to Avoid
- Strictly follow the wiring diagram: Ensure consistent RF cable lengths and connect according to the manufacturer's sequence.
- Use high-precision coaxial cables: Choose low-loss, phase-stable cables to minimize signal differences.
- On-site phase testing: After terminal installation, check array phase consistency using test equipment and adjust if necessary.
Error Two: Severe Multipath Effects Caused by Installation Location
What is Multipath Effect?
Multipath effect occurs when signals reflect or refract during transmission and reach the receiver through multiple paths. For anti-jamming terminals, multipath signals interfere with normal signals, causing reduced positioning accuracy or limited interference suppression capability.
Common Problems
- Antennas installed near tall buildings, metal structures, or other reflective surfaces
- Installed indoors or in semi-enclosed environments
- Platform or ground materials enhancing signal reflection
How to Avoid
- Choose an open installation environment: Install the antenna in locations free from obstructions and far from large metal objects.
- Increase antenna height: Place antennas on top of platforms or dedicated mounts to reduce ground reflections.
- Properly isolate reflective surfaces: Use absorbing or anti-reflective materials near unavoidable metal structures to mitigate multipath effects.
Error Three: Poor Heat Dissipation Design Causing FPGA Throttling
Why Does Heat Dissipation Affect Terminal Performance?
Modern AJ terminals contain high-performance chips such as FPGAs. During prolonged high-load operation, if heat dissipation is inadequate, chip temperature rises, and the system automatically throttles to protect the hardware, reducing signal processing capability.
Common Symptoms
- Device performance drops after continuous operation
- Delay in real-time interference detection
- Overall reduction in terminal operational efficiency
How to Avoid
- Ensure proper ventilation: Keep ventilation openings unobstructed during installation.
- Use heat dissipation aids: Employ fans, heat sinks, or thermal conductive materials to assist in cooling chips.
- Monitor temperature status: Regularly check terminal temperature and address overheating issues promptly.
On-Site Calibration and Cabling Best Practices
Proper cabling and on-site calibration are key to stable AJ terminal operation. Key recommendations include:
- Standardize RF cabling: Follow cable lengths and connection order precisely to ensure phase matching.
- Static terminal testing: Perform basic signal tests in a no-interference environment after installation to confirm array functionality.
- Simulate interference sources: Use controllable signals to simulate interference, verify terminal anti-jamming capability, and adjust installation angle or cable positions.
- Record installation environment details: Include height, surrounding obstacles, and platform materials for future reference.
- Regular maintenance checks: Inspect RF cable connections, antenna condition, and heat dissipation systems to ensure long-term stable operation.
Contact Our After-Sales Technical Support Team
If you encounter issues during installation and commissioning, SATA's after-sales technical team provides professional guidance. We offer remote assistance or on-site support to help customers complete deployment quickly and ensure stable and efficient operation of their anti-jamming terminals.
SATA provides the Small Caliber Anti-Jamming Terminal SH-K66, designed for anti-jamming GPS navigation on drones. It protects platforms from various unintentional interference and malicious attacks, significantly enhancing PNT information security. The terminal features anti-deception functionality, interference power detection for calibration, 4-element single-frequency anti-interference capability (B1, L1, G1, E1), support for secondary development including spectrum monitoring and histogram analysis, and a built-in anti-jamming GPS navigation module that outputs NMEA0183 positioning information. Contact us to get a customized solution for your platform.
