Jiyi Obstacle Avoidance Radar for Agriculture Drones (UAV-R21-B) Rear Radar

Product Overview

The Jiyi Obstacle Avoidance Radar (UAV-R21-B) is a rear-facing radar sensor designed to improve the safety and reliability of agricultural drones during spraying, mapping, and autonomous flight operations. Mounted at the rear of the UAV, it continuously detects obstacles behind the drone, helping prevent collisions while reversing, turning, or returning to the home point.

Using advanced 24GHz FMCW radar technology, the UAV-R21-B delivers stable obstacle detection in environments where cameras or optical sensors may struggle, such as fog, dust, low light, or bright sunlight. Its compact design, CAN interface, and wide operating voltage make it an excellent choice for professional agricultural drone platforms.

Key Features

Rear Obstacle Detection

Designed specifically for rearward obstacle sensing, the UAV-R21-B monitors the area behind the drone to improve safety during reverse flight, automated missions, and Return-to-Home (RTH) operations.

24GHz FMCW Radar Technology

The radar uses 24.125GHz FMCW technology to provide reliable distance measurement with stable performance across a wide range of environmental conditions.

Detection Range up to 25m

With a sensing range of 1–25 meters, the radar provides early obstacle detection, allowing the flight controller sufficient time to respond and avoid collisions.

High Detection Accuracy

The radar offers ±0.1m ranging accuracy, helping agricultural drones maintain safer flight paths around trees, poles, wires, and other obstacles.

Fast Real-Time Response

Operating at an output frequency of 40Hz, the UAV-R21-B provides continuous real-time obstacle information for responsive autonomous flight.

All-Weather Performance

Unlike vision-based systems, radar performance remains consistent in:

• Fog

• Dust

• Low-light conditions

• Bright sunlight

• Light rain and other challenging outdoor environments

Wide Voltage Input

Supporting an operating voltage of 9V–28V, the radar integrates easily with a wide variety of agricultural drone power systems.

Compact and Lightweight Design

Its compact housing makes installation simple without adding significant payload weight to the aircraft.

Technical Specifications

Package Includes

• 1 × Jiyi Obstacle Avoidance Radar Rear (UAV-R21-B)

Applications

The Jiyi UAV-R21-B is suitable for a wide range of professional UAV applications, including:

• Agricultural spraying drones

• Crop monitoring drones

• Autonomous farming UAVs

• Surveying and mapping drones

• Industrial inspection drones

Its rear obstacle detection capability is especially valuable during autonomous flight, reverse movement, and return-to-home operations where obstacles behind the aircraft may not be visible to the pilot.

Why Choose the Jiyi UAV-R21-B Rear Radar?

The Jiyi Obstacle Avoidance Radar (UAV-R21-B) adds an important layer of safety to agricultural drone operations by providing dependable rear obstacle detection in demanding outdoor environments. With long-range sensing, accurate distance measurement, fast data output, and reliable all-weather performance, it helps reduce collision risks while supporting safer and more efficient autonomous flight.

Whether you're upgrading an existing agricultural drone or building a new UAV platform, the Jiyi UAV-R21-B Rear Radar is a dependable solution for improving operational safety and flight reliability.

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