应用于无线USB的小型超宽带阻带天线  

A Small UWB Band-Notched Monopole Antenna for Wireless USB Applications

作　　者：李智勇[1] 刘运林[1] 张倩[1] 王汇龙[1] 

机构地区：[1]西南交通大学电磁场与微波研究所,成都610031

出　　处：《电讯技术》2011年第12期109-112,共4页Telecommunication Engineering

基　　金：教育部科技创新基金资助项目~~

摘　　要：设计了一种用于超宽带无线通信系统的小型化天线。该天线贴片尺寸为20mm×15mm×3mm，采用U形折叠结构和渐变结构相结合，可使天线具有超宽带特性。为了减小对无线局域网（WLAN）系统5GHz频带的干扰，天线采取了叉形谐振结构来实现对相应频带的抑制。采用仿真软件分析了该天线阻抗带宽和不同频点处的辐射方向图。仿真和实测结果显示，该天线在2．5～4．67GHz和6．28～12GHz内S11〈-10dB，在4．7～6．2GHz内S11〉-10dB，因而有效产生带阻特性。A small Ultra- wideband（UWB） Band - Notched monopole antenna for wireless USB applications is designed in this paper.. The whole size of this antenna patch is 20 mm × 15 mm× 3 mm. With a U - shape folding patch and aperture type patch, the antenna has characteristic of UWB. To reduce the interface with WLAN（Wireless Local Area Network） system in 5 GHz band, a fork - shape structure is added in this antenna. The impedance bandwidth and radiation pattems are simulated. Measured results show that the impedance bandwidth is less than - 10 dB over an operating bandwidth of 2.5 - 4.67 GHz and 6.28 - 12 GHz. The tested S11 gets worse during 4.7 - 6.2 GHz, band - notch characteristics can be achieved effectively.

关 键 词：超宽带天线 带阻天线 无线USB应用 无线局域网 

分 类 号：TN823[电子电信—信息与通信工程]