基于遗传算法的微带缝隙串馈赋形波束天线  

Shaped-Beam Synthesis of Series-Fed Microstrip Slot Array Antenna Using Genetic Algorithm

作　　者：马汉清[1] 褚庆昕[1] 

机构地区：[1]华南理工大学电子与信息学院,广州510640

出　　处：《微波学报》2009年第2期49-52,共4页Journal of Microwaves

基　　金：国家自然科学基金重点项目(u0635004);广东省自然科学基金重点项目(07118061)

摘　　要：使用遗传算法设计了一种串联馈电的8单元微带缝隙阵列天线。天线工作中心频率为3.5GHz,通过在适当位置插入不同特性阻抗的微带馈线,实现了天线在俯仰面95°～130°范围内双侧辐射的余割平方赋形波束设计;同时,将上半空间副瓣电平控制在-19dB以下。在其中心频率上,天线回波损耗小于-35dB,增益达10.9dBi。实测结果与设计结果一致性较好,说明了设计方法的可行性。A novel design of series-fed 8 microstrip slots array antenna with cosecant-squared shape beam is presented. The antenna radiation pattern is shaped by changing the characteristic impedance of the feed line, where genetic algorithm （GA） is employed to decide the locations and lengths of the changed feed strips. The proposed antenna has a double side radiation pattern with shaped beam in 950-1300 pitching angle and a gain of 10.86dBi with suppressed side lobe level to -19dB. Measured results agree well with the simulated results, which show the feasibility of the proposed method.

关 键 词：串馈阵列天线 遗传算法 赋形波束 微带缝隙天线 

分 类 号：TN821[电子电信—信息与通信工程]