一种特殊波束的8mm波导缝隙阵列天线  

A 8mm waveguide slot array with special beam

作　　者：郭陈江[1] 丁君[1] 许家栋[1] 

机构地区：[1]西安市西北工业大学电子工程系,陕西西安710072

出　　处：《电波科学学报》2004年第2期233-236,共4页Chinese Journal of Radio Science

摘　　要：给出了一种特殊波束的矩形波导宽边缝隙行波阵列天线的设计方法 ,对缝隙单元的等效阻抗、行波阵列的设计方法进行了详细讨论 ,阵列馈电采用三角形口面场分布克服了常规口面场分布所带来的馈电电压差别太大的缺陷 ,有利于工程实现。给出了 16个缝隙天线的馈电电压分布及缝隙的位置。通过介质加载来提高天线E面的波束宽度。所设计的天线阵H面波束半功率波瓣宽度为 10° ,副瓣电平为 - 2 0 .4dB ,E面6dB波束宽度为 2 10°。A 8mm waveguide slot traveling wave array with special beam is designed inthis paper. The equivalent guidance of the slot and the design method of the traveling wave array are studied in detail. The triangle field distribution of the antenna aperture is adopted to overcame the problem of large difference of fed voltage between the slots of conventional aperture distribution. It is propitious to engineering realization. The fed voltage and the position of slots are given. The H-plane half-power beam width of the antenna is 10°, the sidelobe is -20.4dB. The E-plane 6dB beam width is 210° expanded by dielectric and conductor coating. The antenna could be used in microwave fusee of missile or shell.

关 键 词：波导缝隙天线 行波阵列 介质加载 等效阻抗 馈电电压 波束宽度 

分 类 号：TN820.15[电子电信—信息与通信工程]