sending a radar signal with known bandwidth from a radar sensor to be tested to a receiving antenna of a radar target simulator;

receiving the radar signal in the radar target simulator with the receiving antenna;

filtering the radar signal in the radar target simulator via a low-pass filter with a known filter curve;

determining the frequency spectrum of the filtered radar signal over a total bandwidth of the low-pass filter given by the filter curve;

calculating a corrected frequency spectrum by correcting a previously determined frequency spectrum via the filter curve such that such a frequency spectrum is obtained as a corrected frequency spectrum that corresponds to the frequency spectrum of the emitted unfiltered radar signal;

calculating the power of a radar signal corresponding to the corrected frequency spectrum;

calculating a scaled radar signal from the filtered radar signal, wherein a power of the scaled radar signal equals a power of the radar signal corresponding to the corrected frequency spectrum in that the amplitude of the filtered radar signal over its entire frequency spectrum is subjected to scalar multiplication equal for all frequencies;

calculating the radar echo signal as a reflection of the scaled radar signal; and

sending the radar echo signal from a transmitting antenna of the radar target simulator to the radar sensor to be tested.