中文摘要：

一种新类型极端宽带(UWB ) 打印了单极天线被介绍，它与在中间的逐渐变细的 CPW feeder 一个圆形或环形的补丁和一架不规则四边形的地面飞机是镇静的。模仿了，试验性的结果被介绍，显示出好同意因此验证设计的有效性。有一个圆形的单极补丁的建议天线完成 11.6:1 VSWR 的测量比率带宽 ? 2 (从 0.79 GHz 到 9.16 GHz ) ，当那与一个环形的补丁获得 10.6:1 的测量比率阻抗带宽时(从 0.87 GHz 到 9.47 GHz ) 。另外，这些图案与简单紧缩的结构展出将近全向的放射模式，它在通讯和其它是吸引人的 UWB 应用。关键词极端宽带 - 打印天线 - 单极天线 - 中国(资助号码 60571053 ) 的国家自然科学基础支持的共面的波导工程，和上海领先的大学教师惩罚工程(资助没有。T0102 ）

英文摘要：

A new type of ultra-wideband （UWB） printed monopole antennas is presented, which is composed of a circular or armular patch and a trapeziform ground plane with a tapered CPW feeder in the middle. Both simulated and experimental results are presented, showing good agreement and therefore verifying validity of the design. The proposed antenna with a circular monopole patch achieves an 11.6： 1 measured ratio bandwidth of VSWR ≤2 （ from 0,79 GHz to 9.16 GHz）, while that with an annular patch obtains a measured ratio impedance bandwidth of 10.6：1 （from 0.87 GHz to 9.47 GHz）. In addition, these designs exhibit nearly omnidirectional radiation patterns with simple compact structures, which axe attractive in communications and others UWB applications.