一种采用组合陷波结构的新型超宽带平面天线

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30 mm×28 mm×0.8 mm。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 novel ultra-wideband planar antenna with assembled band-notched structure

A compact ultra-wideband(UWB) planar antenna is presented.The antenna is etched on a piece of FR4 printed 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,optimized 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 proposed 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 antenna 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.