倾斜波束微带磁八木天线设计  

Design of Microstrip Magnetic Yagi Antenna with a Tilted Beam

作　　者：张昭[1] 曹祥玉[1] 李思佳[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《现代雷达》2015年第5期56-60,共5页Modern Radar

基　　金：国家自然科学基金资助项目(61271100);陕西省自然科学基础研究计划项目(2012JM8003)

摘　　要：在基片集成波导(Substrate Integrated Waveguide,SIW)技术的基础上,文中提出了一种具有垂直极化倾斜波束辐射特性的微带磁八木天线设计方法。该方法将SIW作为磁八木天线的激励单元,采用微带线-锥形转换器为其馈电,利用接地的微带贴片构成磁偶极子引向器,引导场能量从SIW向引向器单元传播,从而实现了垂直极化辐射特性。该天线结构省去了反射器单元,简化了八木天线设计过程。仿真结果表明:该天线相对带宽为16.84%,方向图呈现出垂直极化倾斜波束的辐射特性,并且适当增加引向器的数量可以使天线波束倾斜角度增加。加工制作了天线实物并进行了测试,实测与仿真结果吻合较好,验证了该方法的有效性。Based on the substrate integrated waveguide (SIW) technology, a microstrip magnetic Yagi antenna with vertical polari- zation and a tilted beam is proposed in this paper. The SIW is used as driven element which is connected to a microstrip line via a tapered line. Shorted microstfip patches working as magnetic director elements guide the energy propagating forward and realize the vertical polarization. The design method leaves out the reflector and simplifies the design complexity of conventional Yagi antenna. Simulated results show that the bandwidth reaches 16.84 % and vertical polarization is obtained. In addition, the beam steering an- gle increases as the number of director elements increases appropriately. The proposed antenna is fabricated and measured. Experi- mental results show a good agreement with the simulation.

关 键 词：磁八木天线 基片集成波导 垂直极化 倾斜波束 

分 类 号：TN823.17[电子电信—信息与通信工程]