一种小型化四陷波超宽带天线设计与研究

Design and research of a miniaturized four notch UWB antenna

为有效抑制WiMAX波段、国际卫星波段、X波段以及国际电信联盟(International Telecommunication Union,ITU)波段等窄带通信系统的干扰,设计了一款小型化四陷波超宽带(ultra wideband,UWB)天线.采用改进矩形作为辐射贴片,背板开鱼骨形凹槽,以及在天线结构上添加T形枝节和对称C形枝节、开倒U形槽和刻蚀U形窄缝隙的方法产生3.24~3.8 GHz、4.5~4.97 GHz、7.24~7.76 GHz以及8~8.54 GHz四个波段的陷波特性,从而更好地抑制了陷波波段的干扰.优化测试表明,天线在3~13.09 GHz波段内能够正常工作,且天线的四陷波特性也扩大了应用的领域,适合应用于多数UWB通信系统.

In order to effectively suppress the interference of narrow-band communication systems such as WiMAX band, international satellite band, X band and the ITU band, this paper designs a miniature ultra wideband(UWB) antenna. The improved rectangle is used as the radiation patch. The semicircular groove is dug in the upper part of the rectangle and the two corners below are cut off. The long triangle is also cut on both sides of the end of the microstrip line. The fish bone groove is well modified in the middle of the rectangular ground plate to obtain the perfect ultra wideband characteristics. By digging a semi-circular groove on the radiation patch to introduce T-shaped branches,and opening an inverted U-shaped groove in the center of the radiation patch, introducing symmetrical C-shaped open branches on both sides of the feeder line and etching U-shaped narrow gaps on the feeder line, four band notch characteristics of 3.24-3.8 GHz, 4.5-4.97 GHz, 7.24-7.76 GHz and 8.0-8.54 GHz are produced, which better suppresses the interference in the notch band, shows that the antenna can work normally in the frequency band of3.0-13.09 GHz, and the four notch baud property of the antenna also expands the application field, which is suitable for many ultra wideband communication systems.