WYN Smart Radars
Smart Radars: Revolutionising Human Presence Detection and Motion Sensing
Introduction
Smart radar technology has emerged as one of the most transformative innovations in modern sensing systems. Operating across millimetre-wave frequencies, these compact yet powerful modules are redefining how we detect, monitor, and respond to human presence in both indoor and outdoor environments. Unlike traditional passive infrared (PIR) sensors or camera-based systems, smart radars offer superior accuracy, privacy preservation, and all-weather reliability — making them ideal for a wide range of intelligent applications.
1. 24GHz Radar Module — Motion Sensor for Indoor Human Presence Detection
Overview
The 24GHz Micro Motion Target Detection Radar represents a significant leap forward in indoor sensing technology. Operating at a frequency of 24 gigahertz, this module is engineered to detect even the most subtle movements within an enclosed space, making it far more sensitive and reliable than conventional motion detectors.
Technical Architecture
At the heart of this module lies a single transmitter, single receiver (SISO) microstrip antenna configuration. This compact antenna design enables the radar to:
Transmit Frequency Modulated Continuous Wave (FMCW) signals — a sophisticated waveform that continuously varies in frequency over time
Receive reflected echo signals bounced back from moving targets within the detection zone
Process the difference between transmitted and received signals to accurately determine the presence and movement of targets
The FMCW technology is particularly powerful because it allows the radar to measure not just whether something is moving, but also how far away it is and how fast it is moving — all simultaneously and in real time.
How It Works
When a person enters the detection zone, even minor movements such as breathing, slight body shifts, or hand gestures cause measurable changes in the reflected radar signal. The module's signal processing algorithms analyze these changes to confirm human presence with high confidence. This makes it capable of detecting stationary but living individuals — a capability that traditional PIR sensors fundamentally lack.
Application Scenarios
Indoor Personnel Presence Detection
Smart buildings and offices can deploy these radar modules to determine whether a room is occupied, enabling more intelligent space management and energy optimisation.
Intelligent Lighting Control
One of the most impactful applications is automated lighting systems. Unlike PIR-based lighting that switches off when a person sits still, the 24GHz radar can detect the micro-movements of a seated person and keep lights on appropriately — eliminating the frustrating experience of lights turning off while someone is working at a desk.
HVAC and Climate Control
By accurately detecting room occupancy, smart HVAC systems can adjust temperature and ventilation in real time, significantly reducing energy waste.
Healthcare Monitoring
In hospitals and care facilities, these sensors can monitor patient presence in beds or rooms without the need for invasive wearables or privacy-compromising cameras.
2. High Sensitivity Speed Measurement Radar Module — I/Q Analog Signal Output
Overview
The High Sensitivity 24GHz Speed Measurement Radar Module takes radar sensing to the next level by providing raw I/Q (In-phase/Quadrature) analog signal output, giving engineers and developers direct access to the fundamental radar data for advanced processing and analysis.
Technical Architecture
This front-end millimeter-wave radar module also operates at 24GHz with a single-transmit, single-receive microstrip antenna configuration. What sets it apart is its dual-mode signal transmission capability:
FMCW Mode (Frequency Modulated Continuous Wave) — Used for simultaneous range and velocity measurement
CW Mode (Continuous Wave) — Used for pure velocity measurement with maximum sensitivity
The module outputs intermediate frequency (IF) I/Q analog signals, which are the raw in-phase and quadrature components of the received radar signal. This analog output provides developers with the flexibility to implement custom signal processing algorithms tailored to specific application requirements.
Application Scenarios
Traffic Monitoring
Speed measurement radars are widely used in intelligent transportation systems to monitor vehicle speeds, detect traffic flow, and support automated enforcement systems.
Industrial Automation
In manufacturing environments, these modules can monitor the speed and position of machinery components, conveyor belts, and robotic systems with high precision.
Sports Performance Analysis
Athletes' movement speeds and patterns can be analysed in real time, providing coaches and trainers with valuable performance data.
Research and Development
The raw I/Q output makes this module ideal for academic research and prototype development, where engineers need direct access to signal data for algorithm testing and refinement.
3. Intelligent Wake-Up Radar Module — Close Range Recognition and Detection
Overview
The Intelligent Wake-Up Radar Module is a specialized, highly optimized sensor designed for close-range human detection in interactive and access-control applications. Its primary function is elegantly simple yet remarkably powerful: detect when a person approaches and trigger an immediate response.
Core Functionality
This module is engineered for proximity-based activation, continuously monitoring its immediate environment and outputting a high-level digital signal the moment a person enters its detection range. This "wake-up" functionality is the cornerstone of modern interactive systems that need to conserve power while remaining instantly responsive.
Technical Highlights
Close-range optimized detection — Tuned specifically for short-distance human presence
High-level signal output — Simple, clean digital interface for easy system integration
Low power standby mode — Minimal energy consumption when no target is present
Fast response time — Near-instantaneous detection and signal output
Compact form factor — Designed for seamless integration into consumer and commercial devices
Application Scenarios
Access Control Display Screens
Security panels and access control terminals can remain in low-power sleep mode until a person approaches, at which point the display instantly activates, presenting the user interface for authentication.
Facial Recognition Systems
Facial recognition cameras and systems can be dormant until needed, waking up precisely when a person stands in front of them. This not only saves energy but also reduces unnecessary data capture, addressing privacy concerns.
Advertising and Digital Signage Screens
Retail and public advertising displays can deliver targeted, dynamic content that activates only when potential viewers are present, maximising engagement while minimising energy consumption.
Electronic Locks
Smart door locks equipped with this radar module can illuminate keypads, activate touchscreens, or initiate Bluetooth pairing automatically when a user approaches — creating a seamless, hands-free experience.
Computer and Monitor Wake-Up
Desktop computers and monitors can automatically wake from sleep mode when a user approaches and return to sleep when they leave, creating an intuitive, energy-efficient workspace.
The Future of Smart Radar Technology
As the Internet of Things (IoT) continues to expand and smart buildings become the norm, 24GHz and millimeter-wave radar modules will play an increasingly central role in creating environments that are responsive, efficient, and intelligent. Future developments are expected to bring:
Enhanced AI-powered signal processing for even more accurate human behavior recognition
Multi-target tracking capabilities in compact form factors
Vital sign monitoring — detecting heart rate and breathing patterns through walls
Gesture recognition for touchless human-machine interfaces
Integration with 5G networks for real-time cloud-based analytics
Conclusion
Smart radar modules operating at 24GHz represent a powerful convergence of advanced electromagnetic engineering, signal processing, and intelligent system design. Whether detecting the subtle breathing of a seated office worker, measuring the precise speed of a moving vehicle, or waking up a facial recognition system the moment someone approaches, these modules are quietly but profoundly transforming the way our built environment responds to human presence.
As technology continues to evolve, smart radars will undoubtedly become as ubiquitous as the Wi-Fi routers and Bluetooth chips that already surround us — invisible, reliable, and essential components of the intelligent world we are building.
See Product Model RDWD-11N, RDCS-GRF and RDHX-11NM