中文摘要：

提出了一种基于单负传输线的宽带偶极子天线。通过在偶极子天线的两臂上加载单负传输线结构单元,改变了传统偶极子天线上的电流分布,通过选取合适的电容、电感值,使天线的零阶、一阶谐振点相互靠近,从而实现宽带特性。仿真结果表明,天线的-10dB带宽达到了1.7GHz（2.3~4.0GHz）,相对带宽达到了54%,较传统偶极子天线带宽明显展宽,实际测量结果与仿真结果吻合。天线在整个工作频带范围内,方向图保持了良好的一致性,天线的增益为2~3dBic,与传统偶极子天线相比有明显提高。

英文摘要：

This paper describes a broadband dipole antenna based on the single negative（SNG）transmission line.By loading SNG transmission line structures on both arms of the dipole antenna,the current distribution on the surface of the antenna has changed.And the zeroth-order and first-order resonance was tuned close enough to make the＂dual resonance＂phenomenon by choosing appropriate capacitance and inductance,thus resulting in the bandwith enhancement of the traditional dipole antenna.The HFSS simulation result shows that the-10 dB bandwidth of the antenna reaches 1.7GHz（2.3~4.0GHz）and the relative bandwidth is up to 54%,which is a magnificent progress of the bandwidth enhancement for the dipole antenna.The radiation patterns within the impedance bandwidth shows good consistence,and the gain reaches as high as 2~3dBic.