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雷达信标是一种与船用雷达配合使用的无线电导航装置,它可以安装在灯船、浮筒、岛屿、礁石以及水中建筑物上,作船舶定位、导航之用.由于雷达信标的安装位置不同,它对天线的水平方向图就有不同的要求,通常有全向和定向两种方向图.全向天线可以用圆波导或窄边压缩的矩形波导来实现,而定向天线可以用矩形波导来实现.本文介绍常用波导定向天线的几种形式,着重对矩形波导纵向并联裂缝阵天线的设计进行探讨,并给出了天线方向图和频带等的测试结果. 一、基本原理
Radar beacon is a kind of radio navigation device used in conjunction with marine radar, which can be installed on ships, buoys, islands, reefs and buildings in the water, for ship positioning, navigation purposes.Because the location of the radar beacon is different, it There are different requirements for the horizontal pattern of the antenna, and there are usually two omnidirectional and directional patterns. The omnidirectional antenna can be realized with a circular waveguide or a narrow rectangular waveguide, while the directional antenna can be realized with a rectangular waveguide. This article introduces several types of commonly used waveguide directional antennas, focusing on the rectangular waveguide longitudinal parallel crack antenna array design is discussed, and gives the antenna pattern and frequency band test results.First, the basic principles