| 摘要 |
PURPOSE:To enable detection of a target in a signal sending time band with a radar of correlative coincidence type, by controlling an output of receiving signal in consideration of amplitude ratio and signal sending time band, etc. based on sending of two signals of different frequencies. CONSTITUTION:The 1st and 2nd receiving signals based on sending of two signals of different frequencies with a shorter frequency than the maximum covering area is processed for an amplitude ratio in a computing circuit 8 and also in te adding circuit 7. When the amplitude ratio output of this circuit 8 is larger than zero and occupies the specified area smaller than the infinitive, then the 1st receiving signal does not exist and for zero, a controlling circuit 9 delivers to each the 1st and the 2nd controlling signal (b) and (c). Further, the 2nd controlling signal (b), the 1st controlling signal (c) performing a delay processing corresponding to the maximum distance time band through a range memory 10, the signal sending time band number (d) from a radar are controlled by a controlling circuit 11 and by this circuit formation of a gate circuit 6 is controlled. By a construction taking consideration of these signal sending time band also, a target output by correlative coincidence of signal receiving signal of two kinds and at the same time, detection of a target located in a signal sending time band involving the 1st signal receiving signal can be done by the second signal receiving signal. |
