The Rd-04 is a motion sensing module designed based on the X-band radar chip XBR818, with a central frequency of 10.525 GHz. The module employs a fixed-frequency, directional transmission and reception antenna design (1T1R) and integrates functionalities such as intermediate frequency demodulation, signal amplification, and digital processing. It supports delay configuration and adjustable sensing range.
The Rd-04 features non-penetrating detection (does not sense through walls), excellent anti-interference capabilities, compact size, superior suppression of clutter and higher harmonics, as well as high stability and consistency. In pulse-powered mode, the module achieves ultra-low power consumption at the microampere level, making it ideal for cost-sensitive and low-power application scenarios.
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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