Radar apparatus

G - Physics – 01 – S

Patent

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Details

G01S 13/30 (2006.01) G01S 7/28 (2006.01) G01S 13/28 (2006.01)

Patent

CA 2587622

Marine radar apparatus propagates groups of three pulses A, B, C of the same amplitude but different widths, the shorter pulse enabling detection of close range targets and the longer pulses enabling detection of longer range targets. The pulses are encoded differently with the short pulse A being a continuous wave signal and the longer pulses being modulated with a frequency modulated chirp, one pulse C being chirp up and the other B being chirp down. The power of the radar need only be about 190w.

La présente invention décrit un appareil de radar maritime qui propage des groupes de trois impulsions A, B et C de la même amplitude mais de largeurs différentes, l'impulsion la plus courte permettant la détection des cibles dans une plage proche et les impulsions les plus longues permettant la détection des cibles dans des plages plus éloignées. Les impulsions sont codées différemment, l'impulsion courte A étant un signal d'onde continu et les impulsions plus longues étant modulées linéairement en fréquence, une impulsion C étant modulée linéairement vers le haut et l'autre impulsion B étant modulée linéairement vers le bas. La puissance du radar ne doit être que d'environ 19 Ow.

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