The Ai-Thinker Rd 04 10G Human Body Motion Sensor is a high-precision radar-based motion sensing module designed for human presence detection in smart homes, security systems, and IoT applications. It is built around the XBR818 X-band radar chip with a central frequency of 10.525 GHz, offering reliable and directional motion detection.
The module features a fixed-frequency, directional 1T1R (1 Transmit, 1 Receive) antenna design and integrates advanced functionalities such as intermediate frequency (IF) demodulation, signal amplification, and digital signal processing. These features make the Ai-Thinker Rd 04 Motion Sensor highly stable, consistent, and accurate in detecting human body movements.
The Ai-Thinker Rd 04 supports non-penetrative detection, meaning it does not detect motion through walls, which ensures privacy and accuracy in confined environments. Its superior anti-interference capabilities, clutter suppression, and harmonic filtering enable precise motion tracking even in complex or noisy RF environments.
The module also allows for custom delay settings and an adjustable detection range, offering flexibility in application scenarios. Operating in pulse-powered mode, the Rd-04 achieves ultra-low power consumption at the microampere level, making it ideal for battery-powered, cost-sensitive projects in IoT and smart device development.
Key Features of the Ai-Thinker Rd 04 Motion Sensor
- 10.525 GHz X-Band Radar Technology
Offers directional and accurate motion detection for human presence monitoring. - 1T1R Antenna Design
Ensures focused signal transmission and reception with digital signal processing. - Non-Penetrating Motion Detection
Detects motion without seeing through walls – ideal for privacy-conscious applications. - Low Power Consumption (Microampere Level)
Pulse-powered design suitable for energy-efficient and battery-operated IoT devices. - Configurable Delay & Adjustable Range
Customizable sensing to fit various smart home or automation needs. - High Stability & Interference Suppression
Reliable performance in environments with high RF noise and signal clutter.
Parameters
| Product Parameters | Details |
|---|---|
| Model | Rd - 04 |
| Package | DIP - 6 |
| Size | 15.0 * 15.0 mm |
| Antenna Form | Board - mounted Antenna |
| Frequency Range | 10.275 - 10.775 GHz |
| Operating Temperature | - 40°C to 85°C |
| Storage Environment | - 40°C to 125°C, < 90% RH |
| Power Supply Range | Power Supply Voltage 3.0V to 3.6V, Power Supply Current ≥ 100 mA |
| Supported Interface | IIC |
| Available IO Quantity | 2 |
| Brand | Ai - Thinker |
| Origin | Chinese Mainland |
| Output Type Category | Distance Measuring Sensor |
| Working Principle | FMCW Radar Sensor |
| Sensor Category | Radar Sensor |
| Weight | 2g |
| Working Voltage | 3.3V |
Applications
Lighting Products
- Bulbs
- Downlights
- Ceiling lights
Low-Power Application Scenarios
- Video doorbells
- Digital peepholes
- Door locks
- Low-power cameras
- Smart litter boxes
- Automatic feeders
Comparison
| Comparison Items | Radar Human Presence Sensor | Infrared (PIR) Human Sensor |
|---|---|---|
| Sensing Principle | Based on the Doppler radar sensing principle (active detection) | Based on the pyroelectric infrared sensing principle (passive radiation) |
| Motion Sensing Sensitivity | Capable of detecting human presence, slight movements, and motion states | Only capable of detecting close-range slight movements and motion of humans |
| Sensing Distance | Different sensing distances can be precisely set | Only a general range can be sensed |
| Impact of Environmental Temperature | Not affected by changes in environmental temperature | Sensitivity decreases when the environmental temperature rises close to the human body temperature |
| Application Environment | Not disturbed by heat sources, light sources, and airflows | Easily disturbed by heat sources, light sources, and airflows |
| Penetration Ability | Capable of penetrating insulating materials such as fabric, plastic, and glass | Only capable of penetrating some transparent plastics |
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