Automotive & motorsport


Fig. 1: Short-range and long-range radars provide environment data for various driver assistance systems.


measurement of each sensor on manufacturer production lines as well as type testing of the vehicles ready for series production in which the sensors are integrated. Testing is also required earlier in the development process for sensors, ADAS and vehicles, where maximum test setup flexibility is particularly needed. Testing of individual sensors is best


performed in shielded test chambers, such as the R&S ATS1500C, because test conditions can be accurately reproduced and uncontrolled external influences can be eliminated. Entire vehicles must be measured on a chassis dynamometer under semi-realistic operating conditions. Up to now, only the vehicle could be tested under realistic conditions, and realistic scenarios for radar


tests were only rudimentarily implemented. In particular, simulation of tangential motion was only possible with mechanically moved antennas or antenna configurations with large gaps, yielding unsatisfactory results. Now a new system solution for testing automotive radars brings the diversity of real street scenarios into the test environment. The key to the radar test system, consisting


of the R&S AREG800A radar echo generator and the R&S QAT100 advanced antenna array (Fig. 2), is purely electronic operation. The generator simulates the targets with the desired size (radar cross section), distance and speed, while the antenna array first receives the radar pulses and feeds them to the echo generator, and then returns the echoes at the desired angle or causes them to move in small


Fig. 2: The R&S AREG800A radar echo generator and its RF frontend, the R&S QAT100 advanced antenna array (right), along with R&S AREG millimeterwave remote frontends (small modules). Virtually any type of radar test system can be setup with these three components.


Instrumentation Monthly February 2022


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