宽带平面直角双频单极天线

A Wideband Orthogonal Planar Monopole Antenna with DUAL Frequency

对于超宽带系统，需要具备可工作频率为3．1～10．6GHz的宽带天线。本文介绍了四种宽带平面单极天线，分别为圆形平面单极天线、平面直角单极天线、平面双频单极天线和平面直角双频单极天线。其中平面直角单极天线兼具宽频和全向特性，平面双频单极天线和平面直角双频单极天线在两个谐振点都具有宽带特性，平面直角双频单极天线在整个频带内水平面的辐射方向图几乎都可以达到全向。

For an ultra-wideband （UWB） system, the antenna with wide bandwidth to operate from 3.1 to 10.6 GHz is required. In this paper, four types of wideband planar monopole antennas are presented： planar circular monopole antenna, orthogonal planar monopole antenna, planar monopole antenna with dual frequencies and orthogonal planar monopole antenna with dual frequencies. The second antenna gives omni directional radiation pattern with wide bandwidth, the third and fourth ones have dual frequencies and broad bandwidth at both resonant frequencies. The, radiation patterns of the fourth antenna over all frequency range are almost omni-directional in the horizontal plane.