Radar system comprising a primary radar device and a secondary radar device

摘要

A radar arrangement utilizes a rotating or pivotal antenna lobe and a primary radar device operating with a doppler evaluation system and a secondary radar device equipped with a rotating or pivotal antenna lobe wherein a certain time period (processing time) expires between the scanning of a recognized target by the lobe of the primary radar antenna and the recognition of this target during the target evaluation in the receiver of the primary radar device. A storage device is provided which captures the azimuth angle position of a target recognized by the primary radar receiver and interrogation signals of the secondary radar transmitter are triggered with the help of a control means associated with the storage device for a certain interrogation range only when the antenna lobe of the secondary radar device repeatedly approaches the target. The interrogation range is selected sufficiently large that a number of answer signals is triggered which suffices for the desired reply probability.