一种高增益Vivaldi超宽带天线  

A High Gain Vivaldi Ultra Wideband Antenna

作　　者：欧阳伟忠 周永刚[1] 李博南[1] 谢倩倩[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《电子科技》2015年第8期15-17,20,共4页Electronic Science and Technology

基　　金：江苏高校优势学科建设工程基金资助项目

摘　　要：传统的Vivaldi天线具有超宽带优点,但存在定向性较差,且在工作频带的两端增益下降严重的问题。文中提出了一种高增益的Vivaldi天线,通过对传统微带线馈电结构的Vivaldi超宽带天线加载零折射率超常介质和轴向边缘梳状结构的矩形槽缝结构,提高了天线在整个工作频段内的增益。对所提出的天线进行了设计、优化和仿真分析,并制作天线样品,仿真和测试结果吻合良好。测试与仿真结果表明,在4~11 GHz的工作频段内,天线的回波损耗优于-10 d B;与传统Vivaldi天线相比,在整个工作频段内天线增益均有所提高,其中在工作频率的低端（4~6 GHz）天线增益提高2.5 d B,高端（9~11 GHz）增益提高1.5 d B。The conventional Vivaldi antenna has the advantage of uhra-wideband, but has poor orientation and gain degeneration at both ends of whole band. This paper presents a high-gain Vivaldi antenna with increased overall gain by loading zero-index metamaterial （ZIM） and rectangular comb-slot structure at axial edges （RSE）. The proposed antenna has been designed, optimized and simulated, and antenna samples are fabricated. The simulation and test results are in good agreement. The results show that the return loss is better than 10 dB@4 - 11 GHz, and gain improvement is obtained at whole band, compared with the conventional Vivaldi antenna. The antenna gain is increased by 2. 5 dB at lower frequency band （4 -6 GHz） and 1.5 dB at higher band （9 - 11 GHz）.

关 键 词：超宽带 VIVALDI天线 零折射率超材料结构 梳状结构 

分 类 号：TN822.8[电子电信—信息与通信工程]