| 摘要 |
PURPOSE:To search even a short distance target without decreasing the searching power for a remote distance target by parallel operating a narrow-band filter and wide-band filter. CONSTITUTION:The radar wave of a long pulse width is transmitted via transmission and reception selector 2. The received echoes are passed through the narrow-band filter 9 and the wide-band filter 10 and a re then detected by detectors 11, 12, respectively. The detected outputs are time-dividedly synthesized by a signal processor 13. The echo from the remote distance target which is passed through the filter 9 is displayed 14. The echo from the short distance target which is passed through the filter 10 is displayed 14. Since the echo past the filter 9 is displayed as the echo from the long distance target, the decrease of the searching power for the long distance target is ovbiated. The echo past the filter 10 is displayed as the echo from the short distance target and therefore the short distance target is searched even if the pulse width of the radar wave is made long.
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