一种新颖的宽频带双极化印刷偶极子基站天线

A novel broadband dual-polarized printed dipole base-station antenna

提出一种新颖的宽频带双极化印刷偶极子基站天线。该天线由梯形支撑结构、集成双倒L型馈电线和偶极子3部分组成，安装于底板上形成低剖面结构。仿真结果显示，1．63～2．8GHz频段内，电压驻波比（voltage standing wave ratio，VSWR）小于1．5，隔离度小于-28dB，交叉极化比小于-20dB，最大增益约为11dBi，具有较为稳定的方向图和增益。该天线适用于GSM1800，CDMA1900，IMT-2000，TD—CDMA，WLAN，WiMax等通信标准。

A novel broadband dual-polarized printed dipole base-station antenna was presented. The antenna was composed of trapezoidal supported structure, integrated double inverted-L feed strips and dipoles, which was mounted on a ground plane to produce a low-profile structure. The antenna achieved a common impedance bandwidth of 1.63 N 2. 8 GHz（ VSWR 〈 1.5 ） at both input ports. It had good performance in isolation, which was more than - 28 dB between the two input ports. The cross-polarization of the antenna was better than - 20 dB and the gain is about 11 dBi. The radiation pattern and bandwidth over the operating frequency band were stable. The antenna was suitable for the GSM 1800, CDMA 1900, IMT-2000, TD-CDMA,WLAN and WiMax base station applications.