The LDMRR400C is a high-performance 77GHz radar designed as a comprehensive blind spot detection radar solution for modern vehicles. Integrating BSD (Blind Spot Detection), LCA (Lane Change Assist), DOW (Door Open Warning), and RCTA (Rear Cross Traffic Alert) into a single compact unit, this 77GHz millimeter-wave radar delivers exceptional situational awareness for drivers.
As a leading automotive radar sensor, the LDMRR400C combines long-range detection, high angular resolution, and multi-target tracking to provide reliable radar obstacle warning and collision avoidance support.
1. Next-Generation 77GHz Millimeter-Wave Radar Technology
The LDMRR400C adopts the latest RFCMOS MMIC technology with a 2-transmit, 4-receive (2T4R) antenna array. Operating in the 76GHz ~ 77GHz frequency band, this 77GHz millimeter-wave radar achieves superior sensitivity and resolution for side and rear vehicle perception.
As a dedicated blind spot radar, it continuously monitors adjacent lanes and blind zones, providing real-time alerts to drivers during lane changes and turns.
2. Key Features of This Automotive Radar Sensor
2.1 Long-Range Detection Capability
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Vehicle detection: up to 120 meters
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Pedestrian detection: up to 100 meters
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Minimum detection distance: 0.15 meters
This makes the LDMRR400C a true long range radar sensor, capable of detecting potential threats well before they become dangerous.
2.2 Comprehensive Radar Obstacle Detection
As a reliable radar obstacle detection system, the LDMRR400C identifies stationary and moving targets including vehicles, pedestrians, and roadside obstacles with high precision.
2.3 Wide Coverage & High Precision
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Horizontal FoV: ±75° (150° total)
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Vertical FoV: ±10° (20° total)
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Distance accuracy: ±0.1m
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Distance resolution: 0.25m
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Angle measurement accuracy: ±0.4°
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Relative speed accuracy: ±0.15 km/h
2.4 Massive Target Tracking
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Tracks up to 128 targets simultaneously
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Data refresh rate: ≤50ms for real-time response
2.5 Integrated Warning Functions
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LCA – Lane Change Assist
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RCTA – Rear Cross Traffic Alert
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DOW – Door Open Warning
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RCW – Rear Collision Warning
3. Technical Specifications
| Parameter | Value |
|---|---|
| Frequency | 76GHz ~ 77GHz |
| Modulation | FMCW (CS+MIMO) |
| EIRP | ≤30dBm |
| Working Voltage | 8.0V ~ 32.0V DC |
| Power Consumption | <2W (125mA @12V) |
| Operating Temperature | -40℃ ~ +85℃ |
| Protection Rating | IP 6k9k (dust, high-pressure cleaning) |
| Dimensions | 52mm × 52mm × 17mm |
| Weight | 60g |
4. Automotive-Grade Design & Compliance
The LDMRR400C is built to full automotive-grade standards:
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ISO17387 compliance for blind spot monitoring systems
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IP 6k7 (10cm underwater), ice water impact tested
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EN60068-2-60 anti-salt spray and mixed gas corrosion resistance
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Molex Mini50 automotive waterproof connector
As a premium blind spot radar sensor, it delivers performance that rivals original equipment (OE) systems while meeting international safety standards.
5. Radar Distance Sensor with Flexible Installation
The LDMRR400C functions as a precise radar distance sensor, providing accurate range and speed measurements for surrounding objects. It supports both left (main) and right (auxiliary) configurations via simple pin assignment (ADDR pin high = main, floating = auxiliary). Turn signal, reverse signal, and buzzer/LED outputs enable seamless integration with vehicle warning systems.
6. Eliminating Radar Blind Spot Risks
Every vehicle has a radar blind spot—areas not visible to mirrors or cameras. The LDMRR400C effectively eliminates these dangerous zones by continuously scanning adjacent lanes and rear quarters. Whether changing lanes on the highway or reversing out of a parking space, this automotive radar sensor provides the critical alerts needed to avoid collisions.
7. Typical Application Scenarios
✅ Highway blind spot detection radar for lane change safety
✅ Urban driving with radar obstacle warning
✅ Parking lot rear cross-traffic alert (RCTA)
✅ Door open warning (DOW) for passenger safety
✅ Commercial vehicle side and rear perception
8. Conclusion
The LDMRR400C 77GHz radar is a premium automotive radar sensor that combines blind spot detection radar, radar distance sensor, and long range radar sensor capabilities in one compact, automotive-grade package. With its 120m detection range, 128-target tracking, and comprehensive warning functions, it effectively eliminates radar blind spot risks and delivers OE-level performance for vehicle safety systems.
For more technical data, sample testing, or volume pricing, please contact our sales team.
