一种采用组合陷波结构的新型超宽带平面天线  

A Novel Ultra-wideband Planar Antenna with Assembled Band-notched Structure

作　　者：曾文波[1] 赵嘉[1] 吴其琦[1] 

机构地区：[1]广西工学院电子信息与控制工程系,广西柳州545006

出　　处：《电讯技术》2012年第5期735-740,共6页Telecommunication Engineering

基　　金：广西高等学校科研资助项目(200103YB107)~~

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30mm×28mm×0.8mm。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5.1~5.9 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。A compact ultra-wideband（UWB） planar antenna is presented. The antenna is etched on a piece of FR4 primed circuit board with an overall size of 30 mm × 28 mm× 0. 8 mm. It consists of a polygonal wide slot, a coplanar waveguide （CPW） feeding line, and a fork - shaped radiator. The antenna is designed, opti- mized and parametric studied with the aid of HFSS software. Furthermore, after the addition of an assembled band - notch structure, which is formed by a pair of 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 characteristics. Experiments show that the pmposed 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 anten- na within the frequencies of 5.1 - 5.9 GHz. Thus, the UWB communication system with such assembled band - notched structure antenna can obtain better performance of rejecting the interference caused by Wireless Local Area Network（WLAN） equipment.

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 

分 类 号：TN822[电子电信—信息与通信工程]