RADAR APPARATUS

摘要

Radar apparatus provided with a transmit generator (1) and antenna means (2) for the transmission of comparatively long, linearly frequency-modulated transmitter pulses. Echo signals are received by antenna means (2) and a heterodyne signal is generated in mixer stage (3). Propagation time differences for different echo pulses are compensated by means of a dispersive delay element (4) incorporated in the radar receiver. Distortion of the echo pulses in the dispersive delay element is corrected on the basis of a Fresnel ripple correction. A Fourier transformation unit (5) transfers the corrected echo pulses to time domain video with low sidelobes.