mmWave Radar Sensors
60 GHz Human Presence mmWave Radar Sensor and 77 GHz Directional Motion & Zone Radar Sensor provide non-contact detection of human presence, motion, and micro-movements through radio-frequency sensing, independent of light, temperature, or visual conditions.
Technology Overview
AZJ Smart mmWave radar sensors leverage 60 GHz and 77 GHz millimeter-wave technology to enable precise presence detection, motion characterization, and micro-movement sensing for building automation, industrial control, and intelligent systems. Unlike optical or thermal solutions, radar sensors analyze reflected electromagnetic signals to extract spatial and motion information.
This enables detection of both macro movements, such as walking or gestures, and micro movements including breathing and subtle body motion, ensuring continuous occupancy and activity awareness.
Operating Principle
60 GHz Human Presence mmWave Radar Sensor and 77 GHz Directional Motion & Zone Radar Sensor transmit continuous or modulated RF signals within their respective frequency bands. Reflected signals from targets within the sensing zone are received and processed to extract distance, velocity, and motion characteristics.
- Phase variation indicating distance changes
- Doppler frequency shift representing motion dynamics
- Amplitude variation associated with target reflectivity
Signal processing and temporal analysis enable reliable differentiation between human presence, static objects, and environmental interference.
Sensor Architecture
AZJ Smart mmWave radar sensors are designed as integrated sensing units, combining RF front-end, signal processing, embedded firmware, and standardized system interfaces for predictable deployment in OEM and integrator applications.
RF Front-End
Integrated 60 GHz or 77 GHz radar transceiver optimized for range, angular coverage, and signal stability.
Signal Processing
Baseband filtering, FFT analysis, motion extraction, and feature generation supporting presence and vital-sign sensing.
Embedded Firmware
RTOS-based firmware managing radar timing, processing pipelines, and sensor state with deterministic behavior.
System Interfaces
Standardized data outputs, communication buses, and configuration interfaces for building automation and industrial control integration.
Radar vs PIR vs Camera
mmWave radar sensors complement traditional sensing technologies. The following comparison highlights key engineering characteristics.
| Aspect | mmWave Radar Sensor | PIR | Camera |
|---|---|---|---|
| Detection Principle | RF reflection and Doppler analysis | Thermal variation | Optical imaging |
| Static Presence Detection | Supported | Limited | Supported |
| Lighting Dependency | No | No | Yes |
| Privacy Impact | Minimal | None | High |
| Environmental Robustness | High | Medium | Medium |
Application Scope
60 GHz Human Presence mmWave Radar Sensor and 77 GHz Directional Motion & Zone Radar Sensor are suited for applications requiring reliable presence awareness, privacy preservation, and long-term operational stability.
- Smart lighting and HVAC control
- Occupancy-based energy optimization
- Non-medical vital-sign sensing applications
- Security and pre-intrusion monitoring
Technology Boundary & Considerations
Performance of 60 GHz Human Presence mmWave Radar Sensor and 77 GHz Directional Motion & Zone Radar Sensor is influenced by installation height, mounting orientation, surrounding materials, and environmental reflectivity.
AZJ Smart provides engineering guidelines and integration recommendations to ensure predictable sensor behavior within defined system boundaries.