使用共面波导馈电的超宽带双侧渐变槽线天线

使用共面波导馈电的超宽带双侧渐变槽线天线

内容简介：为了拓展渐变槽线天线的工作频带,提出一种采用共面波导新型馈电结构的双面印刷对跖型渐变槽线天线.基于对渐变槽线天线之宽频带特性受限于现有馈电方式的分析,改用蚀刻于背板的共面波导至双面印刷对跖渐变槽线的行波式转接.其仿真和实验结果一致表明:该馈电方式使天线的阻抗具有高通频响特性,且保持较好的辐射方向性图,在3 GHz以上的频域内,驻波比小于2:1；在4～16 GHz频带内,定向增益高于7 dBi.这种体积很小的特宽频带天线尤其适用于电子对抗和微波成像等系统.

Abstract：In order to broaden the bandwidth of a tapered slotline antenna (TSA), a bilateral tapered slot-line antenna (BTSA) with a new feeding structure of coplanar waveguide (CPW) is developed. Based on the fact that the bandwidth limitation of TSA mainly depends on its feeding structure, an improved CPW-based feed structure etched on the backboard of the BTSA is adopted to perform traveling-wave transition. Both the simulation results and measurement data verify that the proposed feeding structure results in "high-pass" frequency response for antenna impedance matching. The voltage standing wave ratio (VSWR) is less than 2: 1 when the frequency is higher than 3 GHz. The antenna gain exceeds 7 dBi with good radiation patterns when the bandwidth is from 4 to 16 GHz.This ultra wideband (UWB) antenna with a compact size is specially available for the electronic systems of counter-measure and microwave imaging.

作者：章朋, 章文勋,

关键词：超宽带, 渐变槽线天线, 馈电结构, 共面波导,