摘要
针对传统陷波结构只能在单个频点上实现陷波的局限性,文中通过使用开路槽线方法,提出和实现了一种阻带带宽可控且矩形度良好的微带馈电陷波超宽带天线.通过在超宽带天线U形辐射贴片上添加两个L形开路槽线和在馈线端添加一个U形槽线来实现陷波特性,通过调节两个L形开路槽线与U形辐射贴片的耦合间距来控制陷波阻带的带宽.除了阻带5.1～5.8GHz频段之外,该天线在3.1～10.6GHz超宽带频段内获得了很好的宽带阻抗匹配.文中还对该陷波超宽带天线进行了时域分析,计算了天线相关系数和脉冲宽度拉伸比.测量与仿真结果吻合良好,说明该陷波天线能有效地应用于超宽带系统.
As the conventional notched antennas realize band-notched characteristic only at a single frequency, a microstrip-fed notched uhra-wideband （UWB） antenna with controllable notched bandwidths and a high rectangular degree is proposed and implemented by using open-end slots. The band-notched characteristic is realized by adding two L-shaped open-end slots on the U-shaped radiator patch and one U-shaped slit on the feed line of the proposed antenna, and the notched bandwidths are controlled by adjusting the coupling distance between the slots and the slit. With these schemes, the proposed antenna achieves a well-matched broadband impedance in the bandwidth region of 3.1 ~ 10. 6GHz except the rejection bandwidth region of 5.1 - 5.8 GHz. The time-domain behaviors of the proposed antenna are then analyzed and the correlation coefficient as well as the pulse-width stretch ratio is calculated. The measured results accord well with the simulated ones, which means that the proposed antenna is suitable for UWB applications.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期1-7,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61171029)
关键词
无线局域网
超宽带天线
可控陷波阻带
时域分析
相关系数
脉冲宽度拉伸比
wireless local area networks
uhra-wideband antenna
controllable notched bandwidth
time domainanalysis
correlation coefficient
pulse-width stretch ratio
