用于船舶自动识别系统的机载阵列天线设计

为了满足船舶自动识别系统抗干扰性能的要求,设计了一种机载阵列天线.天线阵列由5个单极子天线单元组成,整体尺寸为Φ720 mm×306 mm,天线单元沿圆周均匀排列.通过泰勒分布和牛顿优化算法,优化阵列的辐射幅度及相位,得到实测的方位面增益-15 dB抑制范围达到128°,-20 dB抑制范围达到77°;装机后-15 dB抑制范围在114°以上,-20 dB抑制范围在51°以上.该阵列天线结构简单,成本低,满足机载环境的使用要求.

Design of an airborne array antenna for automatic identification system

In order to meet the anti-interference requirement of automatic identification system ( AIS) , an airborne array antenna is designed. The array antenna is composed of five monopole antenna elements which are arranged evenly along the circle. The overall size of the antenna is Φ720 mm × 306 mm. By means of Taylor distribution and Newton optimization algorithm, the amplitude and phase of radiation are optimized. The measured suppression ranges of the azimuth plane gain of -15 dB and -20 dB reach 28° and 77° respectively. When the antenna is installed on the aircraft, the suppression ranges of the azimuth plane gain of -15 dB and -20 dB reach above 114° and 55° respectively. Meanwhile,the array antenna with simple structure and low cost can meet the requirement of airborne environment.