小型化分形结构UWB天线的研究  

Research of a miniaturized fractal UWB antenna

作　　者：南敬昌[1] 刘银玲 高明明[1] 李蕾[1] Nan Jingchang;Liu Yinling;Gao Mingming;Li Lei(School of Electronics and Information Engineering,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学电子与信息工程学院,葫芦岛125105

出　　处：《电子测量与仪器学报》2018年第12期18-25,共8页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金青年科学基金(61701211);国家自然科学基金(61372058)资助项目;辽宁省高校重点实验室项目(LJZS007)

摘　　要：为满足小型化与系统兼容性的要求,提出了一款具有陷波特性的小型化分形结构UWB天线。采用圆形与正六边形嵌套迭代的三阶类Sierpinski分形结构作为辐射贴片并改进接地板形状,获得良好的超宽带特性。在馈线两侧引入对称L形开路枝节、馈线和接地板上分别开不同尺寸的U形窄缝,产生了3.1～3.8、5～5.9、7.2～8 GHz的三陷波特性,有效实现了与WiMAX、WLAN和X波段卫星窄带通信系统的兼容通信。除3个陷波频段外,该天线具有良好的全向辐射特性、稳定的增益和时域特性,可应用于各种超宽带通信系统之中。To meet requirements of miniaturization and system compatibility,a miniaturized fractal UWB antenna with band-notched characteristics is presented. The good UWB characteristic is obtained by using the third order Sierpinski like fractal structure as radiation patch composed of circular and regular hexagon through nested iteration and improved ground-plane shape. The triple band-notched characteristics at 3. 1 ~ 3. 8,5 ~ 5. 9 and 7. 2 ~ 8 GHz are produced by adding two symmetrical L-shaped open stubs on both sides of the feeder line and etching a narrow U-shaped slot with different size on the ground-plane and feeder line respectively. The compatible communication with WiMAX,WLAN and X band satellite narrow-band communication systems is efficiently realized. Except for the three notched bands,the antenna has good omnidirectional radiation characteristics,stable gain and time domain features which make it suitable for all kinds of UWB communication system.

关 键 词：超宽带 陷波特性 分形结构 嵌套迭代 全向辐射 

分 类 号：TN828[电子电信—信息与通信工程]