一种新型超宽带渐变槽线天线设计

一种新型超宽带渐变槽线天线设计

内容简介：设计并制作了一种新型微带馈电的渐变槽线天线.采用改进的微带一槽线过渡,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15dB,交叉极化低于-18dB.

Abstract：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.

作者：宋跃, 焦永昌, 张福顺, 王乃彪,

关键词：超宽带, 渐变槽线天线, 微带一槽线过渡,