用于认知无线电系统的陷波可重构超宽带天线  

A novel reconfigurable band-notched ultra-wideband slot antenna for cognitive radio systems

作　　者：吕昕梦 蒋炫佑 马文韬 何琬冰 Lv Xinmeng;Jiang Xuanyou;Ma Wentao;He Wanbing(College of Communications Engineering,Army Engineering University,Nanjing 210000,China;China Satellite Marine Track&Control Department,Jiangyin 214431,China)

机构地区：[1]陆军工程大学通信工程学院,江苏南京210000 [2]中国海上卫星测控部,江苏江阴214431

出　　处：《电子技术应用》2019年第3期59-62,共4页Application of Electronic Technique

摘　　要：提出了一种可应用于认知无线电系统的新型陷波可重构超宽带缝隙天线,以改进矩形单极子天线为基本模型,采用切角的矩形地板,实现了2.9～12 GHz的超宽带特性。在改进的矩形辐射片上蚀刻由倒U形和H形组成的对称折叠槽,实现了陷波特性。通过切换3个PIN二极管的状态来改变折叠槽的形状和有效长度,实现了3个频段陷波可重构功能。该天线结构紧凑,便于加工制作,在认知无线电系统中有潜在应用价值。仿真和实测结果表明,该天线具有良好的辐射特性,在WiMAX (3.4～3.9 GHz)、WLAN (4.6～6.0 GHz)和X波段卫星通信(6.5～8.2 GHz)下行链路范围内具有3个可重构的频带陷波功能。A novel printed ultra-wideband(UWB)slot antenna with reconfigurable band-notched characteristics for cognitive radio(CR)applications is presented.An improved rectangular monopole antenna is used as the basic model and a tangential rectangular floor is used to realize the ultra-wideband characteristics of 2.9~12 GHz.The band-notched function is achieved by etching one symmetric folded slot which consists of an inverted U-shaped slot and H-shaped slot on the modified rectangular radiation patch.By switching the pin-diodes to change the shape and effective length of the folded slot,the reconfigurable function is achieved.The antenna is compact and easy to process,and has potential application in CR system.Simulated and measured results obtained for the antenna show that it exhibits good radiation behavior and also has three reconfigurable frequency band-notched functions in the range of WiMAX(3.4~3.9 GHz),WLAN(4.6~6.0 GHz)and downlink of X-band satellite communication(6.5~8.2 GHz).

关 键 词：超宽带天线 陷波 可重构 认知无线电 

分 类 号：TN828[电子电信—信息与通信工程]