一种新颖的双陷波超宽带天线设计

Design of a Novel Dual Band-Notched Ultra-Wideband Antenna

针对超宽带系统易受窄带信号干扰的问题,设计了一种新颖的基于金属开口谐振环结构的双陷波平面超宽带天线。通过在天线的辐射贴片上加载U形槽和在接地板上引入寄生条带的方法实现了双陷波特性。利用仿真软件研究了U形槽和寄生条带的物理尺寸对陷波特性的影响,并对所设计的超宽带天线进行了制作和测量。仿真和测试结果表明,天线在超宽带系统3.1～10.6GHz工作频段内的电压驻波比小于2,在WiMAX和WLAN频率范围具有良好的陷波特性,有效地抑制了超宽带通信系统与窄带通信系统之间潜在的干扰。

A novel planar ultra-wideband antenna based on split ring resonator structure with dual band-notched characteristics is proposed in this paper due to that UWB system is easy to be interfered with the narrow-band signals.U-shaped slot in the radiating patch and one parasitic strip on the ground are utilized to achieve the dual band-notched characteristics.Effects of varying the physical size of the U-shaped slot and the parasitic strip on the antenna band-notched characteristic have also been studied using simulation software,the proposed antenna is fabricated and measured.Simulation and measurement results indicate that the proposed antenna yields a voltage standing wave ratio（VSWR） of less than 2 in the impedance bandwidth range of 3.1 to 10.6GHz,except the bandwidth of WiMAX and WLAN for band notch,which minimized the potential interferences between the ultra-wideband systems and the narrowband communication systems effectively.