一种小型的具有良好陷波特性的超宽带缝隙天线  

Improved Notch-Band Slot UWB Antenna with Small Size

作　　者：叶亮华[1] 褚庆昕[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《电子学报》2010年第12期2862-2866,共5页Acta Electronica Sinica

基　　金：国家自然科学基金重点项目(No.U0635004);广东省自然科学基金资助项目(No.60571056)

摘　　要：为了有效地抑制超宽带通信系统与窄带通信系统之间潜在的干扰,提出了一种小型的带组合陷波结构的缝隙超宽带天线.该天线采用印刷电路板上的多边形缝隙作为辐射单元,由背面的T形微带线馈电,天线的总尺寸仅为16mm×25mm×0.8mm.通过T形微带上开的一C形槽和地板上开的一矩形槽的组合陷波结构,产生阻带特性且阻带陡度更陡峭、带宽更宽,实现了良好的陷波功能.仿真和测试的结果表明,天线在超宽带系统3.1GHz^10.6GHz工作频段内的电压驻波比小于2,在5~6GHz频率范围实现了良好的滤波特性,有效地阻隔了无线局域网系统对超宽带系统的影响.同时该天线在整个工作频段具有良好的全向辐射方向特性和稳定的增益.In order to minimize the potential interferences between the ultra-wideband systems and the narrowband communication systems effectively,a compact slot ultrawideband antenna with assembled band notched structure is presented.A polygon slot on a printed circuit board is taken as the radiating element and is fed by a T-shaped stub.The overall size of the antenna is as small as 16mm×25mm×0.8mm.The assembled band-notch structure formed by a C-shaped slit in the T-shaped stub and a rectangular slit embedded in the ground plane is implemented to shape a much sharper,wider,and deeper notch-band.Simulated and measured results indicate that the proposed antenna yields an voltage standing wave ratio（VSWR） of less than 2 in the impedance bandwidth range of 3.1 to 10.6 GHz,except the bandwidth of 5.0～6.0 GHz for band notch.Thus,the negative effect of WLAN on ultrawideband system is eliminated effetively.Omnidirectional radiation pattern and stable gain are obtained in the whole bandwidth range.

关 键 词：超宽带天线 陷波特性 缝隙天线 小型天线 

分 类 号：TN822[电子电信—信息与通信工程]