一种新型超宽带渐变槽线天线设计  

Design of a novel ultra-wideband tapered slot antenna

作　　者：宋跃[1] 焦永昌[1] 张福顺[1] 王乃彪[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2009年第6期1034-1038,共5页Journal of Xidian University

摘　　要：设计并制作了一种新型微带馈电的渐变槽线天线.采用改进的微带-槽线过渡,更好地解决了超宽带天线的阻抗匹配问题.提出一种新型渐变辐射曲线,有效地改善了低频段的匹配特性.实物样机的测试结果表明,在0.92-14.25 GHz频带内该天线的电压驻波比小于2.0∶1,带宽比达到15.4∶1,而且其带内辐射方向图的前后比大于15 dB,交叉极化低于-18 dB.A microstrip fed ultra-wideband tapered slot antenna is designed and fabricated. The wideband impedance matching is obtained by the use of a modified microstrip/slotline transition. The improvement of impedance characteristics at the lower band is achieved by introducing a novel flare curve as a radiation part. The measured results of the proposed antenna demonstrate that this directional antenna achieves a ratio bandwidth of 15.4 ： 1 for VSWR≤2 from 0.92 to 14.25 GHz. The front-to-back ratio and cross polarization ratio of its radiation patterns over the operating band are greater then 18 dB and less than -- 18 dB, respectively.

关 键 词：超宽带 渐变槽线天线 微带-槽线过渡 

分 类 号：TN823.24[电子电信—信息与通信工程]