带有倒L寄生单元的低剖面方向图可重构天线  

Low-profile pattern reconfigurable antenna with switched parasitic inverted-L elements

作　　者：赵凯南[1] 郑剑锋[1] 孙佳文[1] 陈文华[1] 冯正和[1] 

机构地区：[1]清华大学电子工程系,微波与数字通信国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2011年第2期184-187,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究项目(2009CB320205);国家科技重大专项课题(2009ZX03007-003);国家“八六三”高技术项目(2009AA011503);国家自然科学基金资助项目(60771009)

摘　　要：提出一种带有倒L寄生单元的低剖面方向图可重构天线。该天线由一个有源六边形贴片单元和两个加载开关的倒L寄生单元组成。仿真和测量结果表明:通过改变寄生单元上加载开关的状态,可以使天线工作在3种状态,即SO,OS和OO模式,其中,S代表"短路",O代表"开路"。天线工作在OO模式下,方向图在水平面内的辐射接近全向。工作在SO和OS模式下,天线可以获得良好的定向方向图,并且可以实现方向图在水平面内的切换。同时,该天线为垂直极化,具有低剖面和良好的方向图切换特性,便于与无线接入设备共形集成,适用于室内无线通信系统。A low-profile reconfigurable antenna with parasitic inverted-L elements was developed for wireless communication systems.The antenna consists of a hexagonal patch as the driven element and two parasitic inverted-L elements loaded with switches.Simulated and measured results show that by changing the status of the switches,the antenna is able to operate in SO,OS,and OO modes with S representing short circuit and O for open circuit.The OO mode gives an omni-directional pattern in the azimuthal plane.The SO and OS modes give a directional pattern that can be switched in the azimuthal plane.Moreover,the antenna exhibits vertical polarization characteristics.Owing to the low profile and good beam switching capacity,the antenna can be used for wireless devices.

关 键 词：低剖面 方向图 可重构 天线 

分 类 号：TN92[电子电信—通信与信息系统]