The LDAM1103 is a high-performance 24GHz radar sensor module designed specifically for Doppler speed measurement applications. Adopting the German BGT34LTR11 series 24GHz microwave radar sensor chip combined with a high-gain antenna design, this mmWave radar sensor delivers exceptional sensitivity, low power consumption, and compact form factor. It is ideal for speed detection, motion sensing, and traffic monitoring applications requiring reliable CW Doppler measurement.
1. Advanced 24GHz Radar Technology
As a sophisticated 24GHz radar sensor, the LDAM1103 utilizes the proven BGT34LTR11 series MMIC from Infineon (formerly BGT24LTR11), featuring an integrated transmitter and receiver with I/Q output. The module’s high-gain antenna array provides excellent directivity and sensitivity, enabling accurate Doppler speed measurement at extended ranges. Its low-power design and compact 61×61×7.5mm footprint make it suitable for a wide range of integration scenarios.
2. Key Features of This Radar Speed Sensor
2.1 High-Sensitivity Doppler Speed Measurement
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Transmit frequency: 24GHz ~ 24.25GHz
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Output power (EIRP): +18 ~ +20 dBm
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Receiver sensitivity: -122 dBm
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Overall system sensitivity: -140 dBc
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Intermediate frequency range: 20Hz ~ 20kHz (-3dB bandwidth)
These specifications make the LDAM1103 a reliable radar speed sensor for applications requiring precise velocity detection.
2.2 High-Gain Antenna with Narrow Beamwidth
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Horizontal beamwidth: 12° @ -3dB
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Vertical beamwidth: 24° @ -3dB
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Side lobe suppression (horizontal): -20 dB
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Side lobe suppression (vertical): -18 dB
The narrow beamwidth ensures focused detection with minimal interference from adjacent targets.
2.3 Comprehensive I/Q Signal Output
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I/Q signal amplitude balance: 3dB (typical)
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I/Q signal phase shift: 90° ±10°
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Intermediate frequency output impedance: 100Ω
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Intermediate frequency amplification gain: 50dB
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Low-noise amplifier gain: 10dB
The I/Q output enables direction-of-motion detection, distinguishing between approaching and departing targets.
2.4 Robust Environmental Adaptability
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Wide operating temperature: -45℃ ~ +85℃
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Temperature drift: -1 MHz/°C (typical)
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Compliant with ETSI 300 440 (spurious emissions ≤ -30 dBm)
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Low power consumption: 38 ~ 49mA at 5V
3. Extensive Application Scenarios
3.1 Traffic & Speed Enforcement
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Speed enforcement systems – accurate vehicle speed measurement for traffic law enforcement using 24GHz radar sensor technology
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Traffic flow monitoring – detecting vehicle presence and speed for traffic management
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Toll collection systems – vehicle detection and classification at toll plazas
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Intersection vehicle detection – triggering traffic light timing based on approaching vehicles
3.2 Automotive & Transportation
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Vehicle speed measurement – on-board speed detection for various vehicle types
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Bicycle and pedestrian detection – identifying moving targets in urban environments
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Railway crossing warning – detecting approaching trains for gate control
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Parking management – detecting vehicle entry and exit in parking facilities
3.3 Industrial & Manufacturing
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Conveyor belt speed monitoring – measuring linear speed of moving materials
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RPM measurement – detecting rotational speed of motors and machinery
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Process control – monitoring material flow in production lines
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Quality control – measuring speed consistency in manufacturing processes
3.4 Sports & Performance
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Athletic performance measurement – speed tracking for training purposes
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Ball speed detection – measuring projectile velocity in various sports
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Vehicle racing – speed monitoring in motorsport events
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Speed training – providing real-time feedback for athletes
3.5 Security & Surveillance
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Motion detection – perimeter security and intrusion detection
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Access control – detecting approaching vehicles or pedestrians
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Critical infrastructure protection – monitoring approaches to sensitive facilities
4. Why Choose the LDAM1103?
| Feature | LDAM1103 Advantage |
|---|---|
| Technology | German BGT34LTR11 MMIC – proven reliability |
| Sensitivity | -140 dBc system sensitivity – detects weak signals |
| Beamwidth | 12° horizontal – focused, interference-free detection |
| I/Q Output | Direction detection – approaching vs. departing |
| Power | Ultra-low 38-49mA consumption – battery-friendly |
| Compact Size | 61×61×7.5mm – easy to integrate |
| Compliance | ETSI 300 440 certified – ready for regulatory approval |
| Temperature Range | -45℃ ~ +85℃ – suitable for extreme environments |
5. Conclusion
The LDAM1103 24GHz radar sensor is a versatile radar speed sensor module that combines high sensitivity, low power consumption, and compact size. As a reliable 24GHz microwave radar sensor and mmWave radar sensor, its narrow beamwidth, I/Q output for direction detection, and compliance with ETSI 300 440 standards make it an ideal solution for traffic monitoring, automotive speed detection, industrial process control, and security applications. Whether used in speed enforcement systems, conveyor belt monitoring, or motion detection, this 24GHz radar sensor delivers reliable, maintenance-free performance.
For technical datasheets, sample testing, or volume pricing, please contact our sales team.
