一种新型缺陷地结构的双陷波超宽带天线

A Double Band-notched UWB Antenna with Novel DGS

针对超宽带系统易受窄带信号干扰的问题,设计了一种新型双陷波平面超宽带(UWB)天线,地板采用新型的缺陷地结构(DGS)扩展带宽,通过在八边形天线的辐射贴片上加载2个U形槽实现了3.4～3.9GHz和5.2～5.8GHz频段内的双陷波特性,并在馈线上加载枝节改善天线的陷波特性.利用仿真软件研究了2个U形槽对陷波特性的影响,分析了天线的方向图和增益特性,并将其加工成实物.仿真和测试结果表明,该天线形状新颖,结构简单,性能优良,易于集成,能够广泛应用于超宽带无线通信设备中.

A novel planar ultra-wideband antenna with double band-notched characteristics was proposed according to the fact that UWB system was easy to be interfered with the narrow-band signals.The new DGS was used on the ground to expand the bandwidth.Two U-shaped slots were utilized on the octagon radiating patch to achieve the double band-notched characteristics within the frequency range of 3.4 to 3.9 GHz and 5.2~5.8 GHz.A pair of branches were used on the fed line to improve the band-notched characteristics.Effects of the two U-shaped slot on the antenna band-notched characteristics were also studied with simulation software.Radiation patterns and gain curves were analyzed,and the proposed antenna was fabricated.Simulated and measured results indicate that the proposed antenna has novel shape,simple structure and good performance.The proposed antenna is also easy to be integrated and can be widely used in UWB wireless communication.