基于终端开口波纹加载矩形波导的新型漏波天线  

A novel leaky-wave antenna using rectangular waveguide loaded with open-ended corrugations

作　　者：潘攀[1] 唐恺[1] 孟繁义[1] 吴群[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,哈尔滨150001

出　　处：《中国科技论文在线》2007年第10期703-707,共5页

基　　金：国家自然科学基金(60571026)

摘　　要：采用终端开口波纹加载的矩形波导设计一种支持后向到前向的180°空间扫描的新型扫频漏波天线。矩形波导(TE模式)在截止频率以下具有并联电感效应,而波导宽边的周期加载的波纹结构能展现出串联电容特性,因而可以构造左手传输线波导。相比于先前的左手波导,本文的终端开口波纹更有利于波导能量辐射,因而在漏波天线的设计上有其较大的优势。文中采用等效电路模型和数值方法分析该矩形波导的色散特性,并通过观察电场幅值分布图验证其后向波效应。最后采用数值仿真研究漏波天线的传输特性和辐射特性。A novel leaky-wave antenna based on the rectangular waveguide loaded with open-ended corrugations, which supports backward to forward beam scanning is presented.The left-handed property shown in the waveguide is established by combination of inductive nature due to evanescent transverse electric（TE）modes from traditional rectangular waveguides and series capacitance produced by the dielectric-filled corrugations.Compared with previously referred left-handed（LH）waveguides,this proposed structure is more effective for leaky-wave antennas （LWAs）design.To determine the dispersion property,equivalent circuits are adopted and further numerical method is used to calculate the Electric field distribution for backward wave effect.At last,the transmission and radiation properties are investigated utilizing the same numerical method.

关 键 词：电子技术 漏波天线 左手介质理论 左右手复合波导 波纹波导 

分 类 号：TN822.6[电子电信—信息与通信工程]