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船舶在海上航行时,使用导航雷达进行避碰和定位,它要求雷达天线具有特定的方向特性和较高的增益。目前,在航海雷达中广泛采用的天线型式有抛物面型天线和波导裂缝型天线。抛物面型天线种类繁多,电气性能比较优越,工程设计也较成熟,但由于天线尺寸庞大而笨重,受风面积大,坚固天线的附件大,这对雷达的安装造成一定的困难。波导裂缝天线是近十几年发展起来的一种新型天线,除了电气性能比较优越外,还有重量轻,体积小的优点,更适合于航海上的要求。但是,这种天线的工程设计尚存在
When navigating at sea, the navigational radar is used for collision avoidance and positioning, which requires the radar antenna to have certain directional characteristics and high gain. At present, widely used in maritime radar antenna type parabolic antenna and waveguide crack antenna. Parabolic antenna a wide range of superior electrical performance, engineering design is more mature, but because of the antenna size bulky and bulky, windy area, strong antenna attachment large, which caused some difficulties in the installation of the radar. The waveguide crack antenna is a new type of antenna developed in recent ten years. In addition to its superior electrical performance, it also has the advantages of light weight and small volume, and is more suitable for navigation requirements. However, the design of this antenna still exists