基于SRR结构的陷波超宽带天线设计

Design of a band-notched ultra-wide band antenna based on SRR structure

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（SRR）结构的平面超宽带陷波天线。在天线的辐射贴片上加载U形缝隙，实现了其陷波特性。利用仿真软件研究了U形缝隙的物理尺寸对其陷波特性的影响，并对所设计的超宽带天线进行了制作和测量。结果表明，所制天线在超宽带系统3．1～10．6GHz工作频段的电压驻波比（VSWR）小于2，在WLAN频段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-wide band （UWB） antenna based on metal split ring resonator （SRR） structure with band-notched characteristics was proposed accordiiag to that UWB System was easy to be interfered with the narrow-band signals. U-shape slot in the radiating patch was utilized to achieve the band-notched characteristic. The effect of the physical size of the U-shape slot on the antenna band-notch characteristic was studied using simulation software, the designed antenna was fabricated and measured. The results indicate that the voltage standing wave ratio （VSWR） of the prepared antenna is less than 2 in the impedance bandwidth range of 3.1 to 10.6 GHz and possesses the antenna good band-notched characteristic in the bandwidth of WLAN, which suppresses the potential interferences between the ultra-wideband communication systems and the narrowband communication systems effectively.