小型化四馈点多模导航天线设计  

Design of Compact Multi-Mode Navigation Antenna with Four Feeding Coaxial Line

作　　者：张更[1] 王威[1] 霍小宁[1] 王煊[1] 杨绰[1] 金文[1] 王晓飞[1] 

机构地区：[1]北京航天长征飞行器研究所,北京100076

出　　处：《空间电子技术》2017年第6期85-88,共4页Space Electronic Technology

摘　　要：设计了一种工作在北斗B1、GPS L1频段的小型化导航天线。天线辐射部分采用单层微带天线设计,为提高圆极化特性,采用四馈点形式。底端加载馈电网络为带状线结构,降低了天线的剖面高度,实现了天线的多模工作。天线具有体积小、频带宽、圆极化性能好的特点,与飞行器能够共性安装。一分四馈电网络采用叠层结构,即上层为两个一分二馈电网络,相差为90°,下层为一个相差为180°的馈电网络,两层馈电网络之间通过50Ω同轴相连。天线可用于多种载体环境,对多模导航天线的小型化设计具有良好的借鉴作用。Amulti-mode navigation antenna is introduced,which can work in the two bands of BDB1 and GPS L1. Forbetter circular polarization,the antenna is fed by four coaxial cables. Afeed network with stbottom,which can condense the height of the antenna. Characteristics of small volume,wide bandwidth and high phase center stability are listed in this text. The antenna can be integrated conformally into the ining net^vork is make up of nappe structure with a bottom feeding line and a top feeding line. The phase difference of bottom is 180°,and the top one is 90°. The two feeding network is connect by 50Ω coaxial line. The antenna can beused in many bodywork of the carrier,which has a valuable reference in compact antenna.

关 键 词：多模导航 微带天线 小型化 

分 类 号：V474[航空宇航科学与技术—飞行器设计]