基于开环谐振结构的超宽带天线设计  

Design of ultra-wideband (UWB) antenna based on split-ring resonators

作　　者：杨国敏[1] 金荣洪[1] 耿军平[1] 何蔚[1] 房志江[1] 吴琦[1] 丁敏[1] 芮贤义[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《电波科学学报》2008年第2期239-242,251,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金项目(F010402/60501016)

摘　　要：提出了一种新颖的小型共面波导馈电超宽带(UWB)天线。该天线是基于开环谐振器(SRRs)的结构变形而来,设计时共采用了三对成等差数列的开环谐振结构作为天线的辐射面,同时为了获得较好的超宽带频率特性,馈电微带线采用了渐变微带线共面波导馈电结构。通过数值仿真计算获得了优化后的天线几何尺寸,并且加工制作了一副天线,对天线的回波损耗特性、方向图以及增益都进行了测试。测试结果显示该天线具有良好的超宽带特性和较高的增益。A novel ultra-wideband （UWB） antenna fed by planar coplanar waveguide （CPW） is presented in this paper. In the basis of split-ring resonators （SRRs） structure, three SRRs with a dimension varing proportionally to the arithmetic progression sequence is designed as the radiation surface. A tapered transmission line is adopted to improve the return loss performance in the required band. By numerical simulation, a new UWB antenna is optimized, fabricated and measured. The measured results show that the proposed UWB antenna has a wide bandwidth from 2.0 GHz to 18 GHz, and all the measured return losses are less than -10 dB in the whole band with excellent radiation characteristics and relative high gain.

关 键 词：开环谐振器 超宽带天线 共面波导 

分 类 号：TN823[电子电信—信息与通信工程]