共面波导馈电三频段全向天线

CPW-fed Triple-Frequency Omni-directional Antenna

本文提出了一种工作在三个频段的H面全向天线,通过共面波导馈电,使十字型的共面波导上分布的三组单极天线阵分别工作在不同频段,带宽范围完全覆盖现有的移动通信频段和篮牙频段。通过调整各组辐射片的高度以及位置,很容易得到特定的工作频段,同时避开GPS等其他系统频段的干扰。采用电缆在中央处对十字型共面波导馈电方式,保证了H面方向图的全向性,特别在篮牙频段(2300MHz―2500MHz),其增益起伏小于1dB。

A CPW-fed Triple-Frequency Omni-directional antenna is presented in this paper,whose bandwidth completely covers the existing mobile communication bands and Bluetooth band. This new antenna is fed by the CPW. the three groups monopole antenna array distribute on the cross-coplanar waveguide, respectively work in the different band. Its biggest advantage is that the specific working band can be easily achieved by adjusting the height as well as the location of each group antennas, avoiding the interference between the communication radio system and other radio systems,such as GPS. At the same time, it is fed throught the cable in the center of the cross-coplanar waveguide ,and therefore ensure that the H-pattern is omni-directional,especially in the Bluetooth band （2300 MHz - 2500MHz）, the ups and downs of the gain is less than 1 dB.