| 摘要: |
| 首先提出了一种小型平面超宽带天线的设计。天线采用FR4印刷电路板制作，由共面
的叉形辐射单元和多边形缝隙构成，整体尺寸为30 mm×28 mm×0.8 mm。采用
HFSS软件对天线进行了优化设计和参数分析。然后，通过在叉形辐射单元增加微带开路枝节
并且在地板开一对倒L形细裂缝的办法，设计了组合陷波结构的超宽带天线。实验表明：组
合陷波结构天线在51～5.9 GHz阻带内，回波损耗的最大值达-1.5 dB，与常规的
单陷波结构超宽带平面天线相比较，其回波损耗频率曲线更为陡峭，从而能更有效地提高
超宽带通信系统抑制无线局域网设备所带来干扰的能力。 |
| 关键词: 超宽带天线 平面天线 组合陷波结构 回波损耗 无线局域网 |
| DOI： |
|
| 基金项目:广西高等学校科研资助项目（200103YB107） |
|
| A novel ultra-wideband planar antenna with assembled band-notched structure |
| ZENG Wen-bo,ZHAO Jia,WU Qi-qi |
| () |
| Abstract: |
| A compact ultra-wideband(UWB) planar antenna is presented. The an
tenna is etched on a piece of FR4 printed circuit board with an overall size of
30 mm×28 mm×0.8 mm. It consists of a polygonal wide slot, a coplan
ar waveg
uide (CPW) feeding line, and a fork-shaped radiator. The antenna is designed, o
ptimized and parametric studied with the aid of HFSS software. Furthermore, afte
r the addition of an assembled band-notch structure, which is formed by a pair o
f inverted L-shaped slits embedded in the ground plane and an open circuit stub
in the fork-shaped radiator, the proposed antenna exhibits band-notched characte
ristics. Experiments show that the proposed antenna with assembled band-notched
structure achieves a peak return loss of -1.5 dB and a much sharper notched
band than those of conventional single band-notched structure antenna within the
frequencies of 5.1～5.9 GHz. Thus, the UWB communication system with such a
ssembled band-notched structure antenna can obtain better performance of rejecti
ng the interference caused by Wireless Local Area Network(WLAN) equipment. |
| Key words: ultra-wideband antenna planar antenna assembled band-notched structure return lo
ss WLAN |
《电讯技术》编辑部 