笔者提出了一种适用于2G/3G/LTE的双频双极化全向天线。天线的垂直极化单元由两个圆锥组成,可以实现较好的全向辐射特性以及宽频特性。环形天线圆形阵列和印刷偶极子天线圆形阵列分别被放置在垂直极化单元的顶端和中间,通过一个合路器...笔者提出了一种适用于2G/3G/LTE的双频双极化全向天线。天线的垂直极化单元由两个圆锥组成,可以实现较好的全向辐射特性以及宽频特性。环形天线圆形阵列和印刷偶极子天线圆形阵列分别被放置在垂直极化单元的顶端和中间,通过一个合路器将这两个圆形阵列连接起来作为水平极化辐射。仿真结果表明,该天线垂直极化单元实现790MHz^1.14 GHz和1.72~3.51 GHz的带宽,水平极化单元实现了806~980 MHz和1.68~2.99 GHz的带宽。水平极化单元低频增益为0.65±0.4 d Bi,高频增益为3.95±0.6 d Bi。垂直极化单元低频增益为1.75±0.5 d Bi,高频增益为4.35±1.0 d Bi,端口隔离度好,低交叉极化水平和全向增益稳定。展开更多
U-slot patch antennas with П-shaped feed slot are studied, and numerical results based on the FDTD method are presented. The effects of varying physical parameters are investigated with a goal of understanding the co...U-slot patch antennas with П-shaped feed slot are studied, and numerical results based on the FDTD method are presented. The effects of varying physical parameters are investigated with a goal of understanding the coupling among different resonators. It is found that the U-slot patch antenna can be designed to attain 50% impedance bandwidth as well as 30-40% gain bandwidth. By altering the sizes of U-slot and feed slot, the wideband characteristic can be changed into a duai-frequency char- acteristic.展开更多
文摘笔者提出了一种适用于2G/3G/LTE的双频双极化全向天线。天线的垂直极化单元由两个圆锥组成,可以实现较好的全向辐射特性以及宽频特性。环形天线圆形阵列和印刷偶极子天线圆形阵列分别被放置在垂直极化单元的顶端和中间,通过一个合路器将这两个圆形阵列连接起来作为水平极化辐射。仿真结果表明,该天线垂直极化单元实现790MHz^1.14 GHz和1.72~3.51 GHz的带宽,水平极化单元实现了806~980 MHz和1.68~2.99 GHz的带宽。水平极化单元低频增益为0.65±0.4 d Bi,高频增益为3.95±0.6 d Bi。垂直极化单元低频增益为1.75±0.5 d Bi,高频增益为4.35±1.0 d Bi,端口隔离度好,低交叉极化水平和全向增益稳定。
文摘U-slot patch antennas with П-shaped feed slot are studied, and numerical results based on the FDTD method are presented. The effects of varying physical parameters are investigated with a goal of understanding the coupling among different resonators. It is found that the U-slot patch antenna can be designed to attain 50% impedance bandwidth as well as 30-40% gain bandwidth. By altering the sizes of U-slot and feed slot, the wideband characteristic can be changed into a duai-frequency char- acteristic.
