The LD1100 is a high-performance 24GHz radar sensor specifically designed for motion detection, presence detection, and speed measurement applications. Operating in the K-band with CW radar modulation, this millimeter wave radar sensor delivers reliable detection of movement direction and velocity with a 15-meter detection range. Its ultra-compact 46×15×1.5mm design and weight under 2g make it ideal for integration into alarm systems, lighting controls, automatic doors, and smart home devices.
1. Advanced 24GHz Radar Technology for Presence Detection
As a sophisticated 24GHz microwave radar sensor, the LD1100 utilizes K-band CW radar modulation to provide accurate motion and radar presence detection without signal processing on the front end. This mmWave radar sensor features a 40°×40° field of view with both azimuth and elevation coverage, enabling wide-area detection of moving targets including humans and vehicles. The 24GHz frequency band supports global certification without regional adjustments, making it a truly universal solution for international deployment.
2. Key Features of This Radar Sensor
2.1 Global Certification & Universal Compatibility
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Standardized 24GHz frequency band – certified for global use
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No regional adaptation required – ready for multi-market deployment
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Compliance with European and US frequency regulations
2.2 Wide-Area Motion & Presence Detection
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Detection range: 15 meters (for human targets)
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Field of view: 40°×40° (azimuth × elevation @ -3dB)
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Reliable radar presence detection for occupancy monitoring
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Simultaneous transmission of speed measurement results and movement direction
2.3 Ultra-Compact & Lightweight
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Dimensions: 46 × 15 × 1.5 mm – ultra-thin form factor
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Weight: < 2g – easily embeddable in any device
2.4 Low Power Consumption
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Operating voltage: 3.2 ~ 3.4V
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Supply current: 48mA (typical)
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Operating temperature: -25℃ ~ +55℃
3. I/Q Signal Output for Direction Detection
The LD1100 provides I/Q signal output (In-phase and Quadrature channels), enabling:
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Direction of movement detection – approaching vs. departing targets
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Speed calculation – accurate velocity measurement from Doppler shift
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Enhanced presence detection capabilities for smart automation
4. Application Scenarios
4.1 Security & Alarm Systems
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Motion detectors – intrusion detection for residential and commercial security
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Alarm systems – triggering alerts based on detected movement
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Access control – detecting approaching individuals for entry management
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Perimeter protection – radar presence detection for restricted areas
4.2 Smart Home & Building Automation
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Home automation – intelligent lighting and appliance control based on presence
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Lighting control – automatic on/off switching based on occupancy
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Building automation – energy-efficient management of facilities
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Smart home devices – integration with IoT ecosystems
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Occupancy monitoring – presence detection for HVAC optimization
4.3 Automatic Doors & Access
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Automatic door control – detecting approaching pedestrians for door activation
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Hygiene applications – touchless automatic control in restrooms and kitchens
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Elevator call systems – detecting presence for efficient operation
4.4 Industrial & Commercial
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Automation systems – machine activation based on worker presence
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Occupancy monitoring – tracking movement in workspaces
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Vending machines – detecting customer presence for interactive experiences
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Workspace utilization – radar presence detection for office space management
5. Why Choose the LD1100?
| Feature | LD1100 Advantage |
|---|---|
| Technology | 24GHz K-band CW radar – reliable motion & presence detection |
| Certification | Global certification – no regional adjustment needed |
| Detection Range | 15m – suitable for most indoor and outdoor scenarios |
| Field of View | 40°×40° – wide coverage area |
| Size | 46×15×1.5mm – ultra-compact for easy integration |
| Weight | <2g – minimal impact on device design |
| Power | 48mA at 3.3V – low energy consumption |
| Output | I/Q channels for speed, direction, and presence detection |
6. Conclusion
The LD1100 24GHz radar sensor is a versatile radar speed sensor that combines global certification, wide-area detection, and ultra-compact design. As a reliable 24GHz microwave radar sensor and millimeter wave radar sensor, it delivers accurate speed measurement, direction detection, and radar presence detection for a wide range of applications including alarm systems, lighting control, automatic doors, and smart home devices. Its low power consumption, stable performance, and easy integration make it an ideal choice for OEM developers and system integrators seeking advanced presence detection capabilities.
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