Advanced Motion Sensing with 24GHz Doppler Radar
Improve your motion-sensing designs by leveraging CEL’s high-performance LN GaAs FETs for 24GHz Doppler radar and radar module applications. Unlike traditional PIR or ultrasonic detectors, our CE3514M4/CE3520K3 LN-FET devices help deliver precise speed, direction, and range data—maintaining accuracy through dust, darkness, plastics, and glass. Integrate them to unlock reliable occupancy detection, touchfree controls, and smart security in one compact, low-power solution.
Why 24GHz Doppler Radar is Superior
Unlike conventional motion sensors, 24GHz Doppler radar systems provide comprehensive motion intelligence that goes far beyond simple detection. Here’s what makes them exceptional:
- Detects motion, speed, and direction—information that legacy PIR or ultrasound sensors miss
- Robust performance in heat, dust, darkness, and through plastic or glass enclosures
- Compact form factor—antennas are up to 4× smaller than 5.8 GHz solutions, enabling fully hidden installations
- Unaffected by ambient light or temperature swings, eliminating false triggers and "wave-to-wake" headaches
CEL’s High-Performance Building Blocks
The heart of any effective 24GHz Doppler system lies in its components. CEL offers two key LN-FET (Low Noise Field Effect Transistor) devices that deliver exceptional performance:
| Part # | Role | Benefits |
|---|---|---|
| CE3514M4 | Oscillator (high-CNR source) | Superior phase-noise for clean Doppler returns |
| CE3520K3 | Driver / LNA / OSC | Industry-leading low noise, high gain front-end |
Occupancy Sensor Block Diagram
- Oscillator whistles → PA shouts → Antenna broadcasts
- Antenna hears echo → LN amplifies whisper → MCU hears tempo change
- MCU thinks → Lighting Driver acts → Lights respond
When the transmitted wave hits a moving object, it returns with a slightly different frequency due to the Doppler effect. This frequency shift reveals not just that something is moving, but how fast and in which direction.
Package Specifications
M4 Package:
Dimensions: 2.0 x 1.25 x 0.6
K3 Package:
Dimensions: 2.6 x 2.6 x 1.5
Typical Applications
- Automatic Door & Gates
- Security & Surveillance
- Smart Lighting
- HVAC Control
- Industrial Monitoring
- Healthcare & Vital Signs
Getting Started
Ready to explore how 24GHz Doppler sensors can transform your motion-sensing applications? Contact CEL’s RF engineering team for samples, design files, and expert consultation.
Contact Information: RF Team: support@cel.com Technical Resources: Low Noise Devices