基于新型EBG结构的四陷波UWB天线  

A four band-notched UWB antenna based on novel EBG structures

作　　者：张道亮[1] 姜弢[1] 张谢馥 张冰然 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2015年第1期1-5,共5页Applied Science and Technology

基　　金：国防重大基础研究基金资助项目(6131380101)

摘　　要：设计了一种基于新型电磁带隙(EBG)结构的四陷波超宽带(UWB)天线,所设计的天线印刷在介电常数为3,厚度为1.5 mm的介质基板上。为了实现某些窄带通信频段(WIMAX、WLAN双频和X波段下行卫星通讯信号)与UWB天线协同工作,通过对蘑菇形电磁带隙(M-EBG)结构进行改进,将金属过孔移向边角并引入曲流技术,有效地减小了EBG单元的尺寸和谐振带宽,设计了谐振于3.5、5.25、5.78和7.5 GHz处的新型EBG单元,并依次加载于正六边形UWB天线的馈线两端形成耦合。仿真和测试结果表明,所设计的天线满足UWB无线通信系统的要求,并有效地抑制了所述4个频段的信号,具有较高的频谱利用率和稳定的全向辐射特性。A four bands-notched UWB antenna based on novel electromagnetic band gap（ EBG） structures is presented. The antenna is printed on a 1.5 mm thick substrate,which has a relative dielectric constant 3. In order to achieve the collaborative work between some narrow communication bands（ WIMAX,dual band of WLAN and downlink satellite communications signals in X band） and UWB antennas,by improving the mushroom-shaped EBG（ M-EBG） structure,the via is moved to the corner and the technology of meandering current is adopted,reducing the size and bandwidth of EBG unit effectively. On this basis,four novel EBG structures,which are resonant at3.5,5.25,5.78 and 7.5 GHz,are designed and loaded at two sides of a hexagonal UWB antenna feeder sequentially. Simulation and test results show that the proposed antenna can meet the requirements of the UWB wireless communication system and suppress effectively the signals of four bands with high spectral utilization and stable omnidirectional radiation.

关 键 词：电磁带隙 超宽带天线 金属过孔 蘑菇形电磁带隙 频谱利用率 

分 类 号：TN822.8[电子电信—信息与通信工程]