一种低副瓣锐截止波束赋形阵列天线设计  

Design of an array antenna with a low-sidelobe and sharp-cutoff pattern shaping

作　　者：高军[1] 周禹龙 杨群[1] 曹祥玉[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《西安电子科技大学学报》2015年第2期152-156,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61271100;61471389);陕西省自然科学基金资助项目(2012JM8003)

摘　　要：采用联合DFP和BFGS变尺度,结合全局寻优算法,通过优化阵列各单元馈电幅度和相位分布,设计了一种满足低副瓣锐截止波束赋形要求的阵列天线.该阵列由26个印刷振子单元天线组成,各单元馈电电路采用带状线环形桥.馈电电路网络采用带状线结构,整个馈电网络和印刷天线采用一体化设计,具有插入损耗小,结构紧凑的特点.实测表明,3dB波束宽度为11°,水平面锐截止为5.83dB/(°),副瓣低于-20dB.天线设计满足指标要求,并已获得应用.A compact array antenna is designed with variable metric algorithms,namely Davidon-Fletcher-Powell （DFP） and Broyden-Fletcher-Goldfarb-Shanno （BFGS）.Using a global optimization method,the amplitude and phase distribution of current excitations are optimized to achieve a low-sidelobe and sharp-cutoff pattern shaping.The array,consisting of 26 parallel printed dipoles,is powered by a stripline-circuit distribute network connecting 26 individual stripline ring-hybrid feed circuits.The feed circuit network and the printed antenna are designed all together, leading to a low insertion loss and a compact size. Measurements show that the bandwidth is 11°at 3 dB,that the sharp cutoff on the horizon is 5.83 dB/（°）, and that the sidelobes are less than -20 dB.The array antenna meets and exceeds demanded parameters and has been applied to a certain microwave landing system.

关 键 词：阵列天线 波束赋形 副瓣 锐截止 优化算法 

分 类 号：TN82[电子电信—信息与通信工程]