ARS4-C / User Manual
User Manual for
76 - 77 GHz Adaptive Radar Sensor
ADC GmbH
ARS4-C
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Copyright © by Continental 2019
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ARS4-C / User Manual
ADC GmbH
1. Purpose
In this document an operational description of Continental´s 77 GHz Advanced Radar Sensor ARS4-C is given.
Sufficient information is provided to understand the operation principle, the set up and the tuning of the radar
sensor.
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ARS4-C / User Manual
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2. General information
The ARS4-C sensor measures independently the distance and velocity (Doppler's principle) to objects without
reflector in one measuring cycle on the basis of FMCW (Frequency Modulated Continuous Wave) with very fast
ramps. A special feature of the device is the simultaneous measurement of large distances up to 250 meters,
relative velocities between ±300 km/h and the angle relation between two objects.
The sensor is mounted in the front or rear or behind the grill or in the backside behind the bumper.
The sensor performs in alternation a Short Range (SR) Scan cycle and a Far Range (FR) Scan cycle. The Short
Range Scan covers angles of ±90 degrees in front of the sensor. The Far Range Scan covers distances up to
250 meters with angles of ±9 degrees.
The sensor allows a detection of objects in the given Field of View (FoV) and evaluates the current constellation
under consideration of all detected objects and among others the following information:
Vehicle Dynamics Data (e.g. Velocity, Acceleration, Yaw Rate of the host vehicle) which is transmitted to
the sensor from the car via the vehicle bus
ARS4-C is designed for comfort/safety applications in passenger cars and trucks like Adaptive Cruise Control,
Emergency Brake Assist, Occupant Safety Support, Collision Mitigation, Distance Warning/Monitoring etc.
In dependence of the overall information the sensor outputs specific messages, which may then be used by
other vehicle components (braking system, power train, door modules etc.).
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3. ARS4-C Sensor Component Description
The ARS4-C sensor consists of the following components:
Plastic housing with sensor Data Interface connector
Radio Frequency (RF) Printed Wiring Board (PCB) including the antenna which is plugged into the
housing
Low Frequency (LF) PWB incl. Board-to-Board (B2B) Connector (connector between RF and LF unit)
A plastic molded radome through which the radar beams are emitted.
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ARS4-C / User Manual
ADC GmbH
4. ARS4-C Sensor Software Operation
Several operational modes based on vehicle speed exist where the sensor measures continuously with pulse
frequency modulation (FM). The sensor operates in this mode over its life time in the vehicle, being powered by
the vehicle power supply.
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