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港口雷达是船舶交通管制系统的重要组成部分,它主要是对进出港区的船舶进行引导和监视。天线好比是雷达的眼睛,它的参数将直接影响雷达的使用性能。本文就下列五个天线参数,分别进行概述。一、半功率点水平波束宽度θ_(0.5H) 港口雷达要求有很高的方位分辨力,才能对船舶进行引导和监视。方位分辨力R_θ可按下列两种情形进行估算:当波束宽度θ_(0.5H)大于雷达荧光屏光点直径d时,R_e主要决定于θ_(0.5H);当波束宽度θ_(0.5H)小于雷达荧光屏光点直径d时,R_θ主要决定于d。
Port radar is an important part of the ship traffic control system. It mainly guides and monitors ships entering and leaving the port area. Antenna is like the radar eye, its parameters will directly affect the performance of the radar. This article on the following five antenna parameters, respectively, an overview. First, the half-power point horizontal beam width θ_ (0.5H) Port radar requires a high azimuth resolution in order to guide and monitor the ship. The azimuth resolving power R_θ can be estimated in the following two cases: R_e mainly depends on θ_ (0.5H) when the beamwidth θ_ (0.5H) is larger than the diameter d of the radar screen; when the beamwidth θ_ (0.5H) is smaller than the radar Fluorescent screen spot diameter d, R_θ mainly depends on d.