摘要
首先提出了一种新结构共面波导馈电的小型平面超宽带(UWB)天线,该天线类似一般的共面波导馈电宽缝隙天线,为了获得超宽带工作特性,设计方案中采用了叉状结构的调谐支节,并将其辐射缝隙设计为多边形;通过数值计算研究了某些尺寸参数对天线输入特性的影响,在计算的基础上通过大量的实验详细研究了天线的频域工作特性,然后对其时域瞬时脉冲信号保真度特性进行了数值分析。计算与实验的结果表明,该天线具有超过3.2∶1的工作带宽和全向辐射特性,而且具有较好的线性相位传输特性和脉冲信号保真度,是一种有实用意义的超宽带天线。
In this paper, a novel compact coplanar waveguide ( CPW)- fed antenna is proposed. The antenna is similar in configuration to a conventional CPW-fed wide slot antenna, but it consists of a fork-like tuning stub and a polygon-like slot in order to achieve ultra-wideband characteristic. It has been studied in detailed for its performance in frequency-domain numerically and experimentally, and it has also been studied for its transient pulse signal fidelity in time-domain numerically. It' s shown that an operation bandwidth of over 3.2:1 and good omnidirectional radiation patterns can be achieved. Furthermore, good linear phase characteristic and impulse signal fidelity can also be achieved. Thus it is a promised candidate antenna for ultra-wideband (UWB) communication system.
出处
《微波学报》
CSCD
北大核心
2006年第4期19-23,共5页
Journal of Microwaves
基金
国家自然科学基金资助项目(60432040)
关键词
超宽带
共面波导
小型平面天线
脉冲信号保真度
Ultra-wideband, Coplanar waveguide, Compact planar antenna, Pulse signal fidelity