摘要
基于偶极子组阵结构,设计了一种具有水平全向辐射方向图和水平极化特性的平面天线。该天线由3只偶极子天线组成,每只振子弯折30°并上下交错印刷在PCB板的表面上,构成正六边形环,环的直径为0.45λ0(λ0为中心频率处的自由空间波长)。3只偶极子天线均采用SMA接头直接顶馈,从而省略了偶极子天线的馈电巴伦。通过优化偶极子天线振子长度和间距等结构参数,以及控制馈电相位,实现水平全向辐射。设计和加工制作了一只工作频率为2.45 GHz的天线样品,测试与仿真结果吻合良好,其|S11|≤10 dB的相对阻抗带宽为12.94%(2.367~2.684 GHz),水平全向增益约为1.42 dBi,不圆度小于±0.7 dB。
Based on an array of dipole antennas,an antenna with the characteristics of horizontal omnidirectional radiation pattern,horizontal polarization and planar structure is proposed.The antenna is composed of three dipole antennas,whose radiators are bent 30°and printed on a PCB(Printed Circuit Board)in an alternative way(top and bottom),and forms a hexagon ring with a diameter of 0.45λ0(λ0 is the free-space wavelength).The three dipole antennas are directly fed through SMA(Small A Type)connectors,and thereby feeding baluns can be cut.By optimizing the structural parameters such as the dipole antenna’s length and distance,as well as controlling the feeding phase,a horizontal and omnidirectional radiation pattern is realized.As a sample,such an antenna working at the frequency of 2.45 GHz is designed,fabricated and tested.The measured results agree well with the simulated ones,indicating the antenna has encouraging features such as the impedance bandwidth of 12.94%(2.367-2.684 GHz)with|S11|≤10 dB,and a good horizontal omnidirectional radiation pattern with the gain of 1.42 dBi and gain variations within±0.7 dB.
作者
苏金花
陈星
SU Jinhua;CHEN Xing(School of Electronic and Information Engineering,Sichuan University,Chengdu Sichuan 610064,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2019年第4期627-631,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
装备预研教育部联合基金资助项目(6141A0202504)
关键词
偶极子阵
全向天线
水平极化
平面天线
dipole array
omnidirectional antenna
horizontal polarization
planar antenna
