The rapid advancement of drone technology has enabled its widespread application across various industries. However, flight safety remains a critical bottleneck restricting its further development. In recent years, radar technology has seen significant progress in the drone sector, making important contributions to enhancing flight safety.

Radar is a radio detection and ranging system that can identify a target's distance, speed, azimuth, and other information. In the field of drones, radar is primarily applied in three ways:

Drone Radar Altimeter: Mainly used for takeoff and landing assistance, measuring real-time relative height above ground to improve drone reliability.

Drone Obstacle Avoidance Radar: Primarily detects targets beyond 50 meters ahead, enabling autonomous flight and enhancing flight safety.

Terrain-Following Radar: Monitors real-time terrain changes ahead and adjusts flight altitude based on terrain height, improving flight safety and stability.

1. Drone Radar Altimeter
The drone radar altimeter is the most widely used type of radar in drones. It calculates the relative height between the drone and the ground by emitting radio waves and receiving signals reflected from the ground. The measurement accuracy of a drone radar altimeter can reach ±2 cm, effectively preventing ground collisions during takeoff and landing.

The application of drone radar altimeters enhances the reliability of takeoff and landing procedures. By providing accurate altitude data, it helps maintain stable flight conditions during these critical phases, avoiding ground collisions.

2. Drone Obstacle Avoidance Radar
Drone obstacle avoidance radar is a relatively new technology. It detects objects in the surrounding environment by emitting radio waves and receiving reflected signals from targets. This radar can identify objects that are difficult for visual systems to detect, such as low-flying birds or suspended balloons.

The use of drone obstacle avoidance radar significantly improves flight safety. It provides situational awareness of the environment, enabling drones to autonomously avoid obstacles and prevent collisions.

3. Terrain-Following Radar
Terrain-following radar is an emerging technology in the drone industry. It constructs terrain models by emitting radio waves and receiving signals reflected from the ground. This allows drones to navigate complex terrains safely, avoiding ground collisions or crashes.

The application of terrain-following radar enhances flight stability. By supplying detailed terrain information, it helps drones maintain stable flight attitudes, even in challenging environments, reducing the risk of loss of control.

The Application of These Three Radar Technologies Provides Multiple Safeguards for Drone Flight Safety:
Drone radar altimeters improve takeoff and landing reliability.

Drone obstacle avoidance radars enhance flight safety.

Terrain-following radars ensure flight stability.

Nanoradar Drone Radar Product Panorama

Future Outlook
Drone radar technology will develop in the following directions:

Higher Measurement Accuracy: Drone radar precision will continue to improve to meet the demands of more advanced applications.

Lower Costs: The cost of drone radar will decrease, making it more accessible.

Greater Integration: Drone radar systems will become more integrated, simplifying their application in drones.

As these technologies evolve, drone radar will provide even more comprehensive guarantees for flight safety, promoting the broader adoption of drones across various industries.