10G motion sensing radar module

Product Parameters

Frequency: 10.525GHz (typ.)
Operating Voltage: 3.3V (3.3~12V)
Operating Current: ~10mA @ 5V DC
Output Voltage Vout: 3V (2.9~3.1V)
Output Current: <10mA
Power-On Stabilization Time: 15s (typ.)
Sensing Range: Radius of 3.0~5.0 meters (at a height of 3 meters)
Sensing Angle: 110° ± 10 (ceiling-mounted)
Delay Time: 5s (typ.)
Blocking Time: 1s (typ.)
Operating Temperature: -20℃ to +60℃

Product Description

The LD104 is a microwave/motion sensing module designed around an X-band radar chip with a center frequency of 10.525GHz. It features a fixed-frequency, directional transmission and reception antenna (1TIR) and integrates intermediate frequency demodulation, signal amplification, and digital processing functions. The module also provides an open communication port, allowing for delay settings, adjustable sensing range, and light intensity detection, enabling customers to adjust parameters easily. This product employs a pulse power supply mode, with an average current as low as 10mA. It offers advantages such as non-penetration through walls, anti-interference, compact size, clutter and harmonic suppression, and high stability and consistency. Suitable for embedded concealed designs, it is unaffected by temperature, humidity, oil fumes, or water mist, making it ideal for applications in smart lighting, security, home automation, and other fields requiring automatic sensing control.

Product Features:

Operating Frequency: 10.525GHz
Wide Voltage Range: +3.3V to +12V
Sensing Distance: Radius of 3~5m (adjustable)
Ceiling-Mounted Installation, Sensing Angle: 110° ± 10°
Maximum Transmission Power: 2dBm
Maximum Receiving Sensitivity: -95dBm
Onboard Integrated Transmit and Receive Antennas
Designed for Micro/Motion Sensing Applications

Product Applications

Smart access control

Smart Home

Pet Feeder

Precautions:

When installing devices with radar modules, ensure they are positioned away from ventilation ducts, fire pipes, drainage pipes, mechanical vibrations, or large metal equipment that might cause strong vibrations, as these can affect radar reflection and detection sensitivity.
Avoid working on the device while it is powered to prevent accidental operation, incorrect connections, circuit damage, or electric shock.
Do not install in locations exposed to direct sunlight or rain to prevent damage and ensure longevity.
Ensure the device is installed away from electromagnetic fields to prevent interference and false triggering. Additionally, avoid installing near objects that rotate or sway, such as fans, swaying leaves, or clothes drying in the wind, to prevent false activations.
When multiple devices with built-in radar modules are installed, maintain a distance of ≥0.5 meters between them.
The radar microwave module’s antenna surface should be at least 5mm away from the product casing to avoid affecting the sensing range.
Products with built-in radar modules should be placed horizontally or vertically and avoid face-to-face installation of two or more such devices within the effective sensing range.
Ensure that there are no other light sources (e.g., emergency lights, guide lights) near devices with built-in radar modules (e.g., lamps) to prevent interference with the built-in light sensor, which could cause the device to malfunction (e.g., staying off, misjudging it as daytime).
If a device with a built-in radar module (e.g., a lamp) remains constantly on and does not switch based on motion detection, the radar module may be experiencing intermediate frequency interference, causing it to continuously detect movement within the sensing range. In this case, power off the device and check the power supply status and the spatial positioning of the module.
If the above issues are not resolved, disconnect the power and inspect the surrounding installation area for environmental interference. If problems persist after restarting the power, consider replacing the device’s power supply board or radar module for further verification.