摘要
对比研究了国内外风廓线雷达产品天线系统和子阵的类型,设计了一款5波束有限相扫相控阵微带天线子阵。此天线系统由21个相同的正方形子阵组成,每个子阵包含16个阵元,4×4的正方形对称划分,每个阵元采用东西向、南北向2点同轴背馈馈电,子阵内双方向分别设计了等幅等相馈电网络,进而实现了东西向和南北向的水平极化。天线子阵各端口驻波小于1.2,提高了天线探测灵敏度,缩小了相控阵天线阵面面积,减轻了天线阵重量。结合子阵划分,优化了相控阵天线系统泰勒加权。天线具有两维步进电扫功能,在空域形成5个波束的探测。应用在TWP3型边界层风廓线雷达上,雷达探测高度大于5km。
The paper introduces the types of antenna systems for wind profile radar products at home and abroad.After the comparative study of various antenna systems,a five-beam finite phase-sweep phased array microstrip antenna subarray is designed.This antenna system consists of 21 square elements;each subarray contains 16 array elements,4×4 square symmetric division,and the array element adopts the east-west/north-south two-point coaxial back-feed feeding;in both sides in the sub-arrays,the equalamplitude and equal-phase feeding networks are designed to realize horizontal polarization in east-west and north-south directions.The standing wave of all array elements is less than 1.2,improving the antenna detection sensitivity.The area of the phased array antenna and the weight of the antenna array are reduced.Combined with the sub-array division,the Taylor weighting of the phased array antenna system is optimized.The antenna has the two-dimensional stepping sweep function to form five beams in the airspace.It is applied to the TWP3 boundary layer wind profiler radar to improve the overall performance.The radar detection height is greater than 5 km.
作者
刘宁波
张建云
梁学东
李翠娜
LIU Ningbo;ZHANG Jianyun;LIANG Xuedong;LI Cuina(Beijing Metstar Radar Company Co Ltd,Beijing 100094;China Huayun Meteorological Technology Group Corporation,Beijing 100081;CMA Meteorological Observation Centre,Beijing 100081)
出处
《气象科技》
2020年第1期15-22,共8页
Meteorological Science and Technology
关键词
对称子阵划分
双馈点贴片
水平极化
同轴背馈
子阵模块化
symmetric subarray division
double feed-point patch
horizontal polarization
coaxial back feed
subarray modularity
