宽波束±45°双线极化偶极子天线阵列设计  

Design of a Wide-beam±45°Double-line Polarization Dipole Antenna Array

作　　者：姜兴[1] 程林 李晓峰[1] 彭麟[1] 廖欣[1] JIANG Xing;CHENG Lin;LI Xiaofeng;PENG Lin;LIAO Xin(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电讯技术》2023年第1期131-136,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61761012);广西科技基地和人才专项(桂科AD19245051);广西重点研发计划项目(桂科AA19254012-2)。

摘　　要：针对宽波束天线在移动通信中的应用,实现偶极子阵列天线的宽角域扫描覆盖,设计了一款宽波束天线单元以及1×16相控线阵。采用正交对称振子结构实现±45°方向辐射,振子采用椭圆环结构实现了宽阻抗带宽和宽波束,通过加载梯形结构降低了频段和实现小型化。实测结果表明,天线单元在6.425~7.125 GHz的频带内电压驻波比小于1.3,具有38.8%的相对阻抗带宽,在工作频带内其端口隔离度优于28 dB,3 dB波束宽度在频带内均大于126°,能够很好满足现阶段对阵列天线小型化、宽频带以及宽角域扫描的要求,在移动基站等领域有广阔的应用前景。For the application of wide-beam antennas in mobile communications and realizing wide-angle scanning coverage of dipole array antennas,a wide-beam antenna unit and a 1×16 phased linear array are designed.The orthogonal symmetrical oscillator structure is used to realize±45°radiation.The elliptical ring structure is used to realize wide impedance bandwidth and wide beam.The frequency band is reduced and the size is miniaturized by loading the trapezoidal structure.According to the actual measurement results,the voltage standing wave ratio is less than 1.3 in 6.425~7.125 GHz,the relative impedance bandwidth is 38.8%,its port isolation is better than 28 dB in the working frequency band,and its 3 dB beam width is greater than 126°in the frequency band.It can meet the requirements of miniaturization,wide-band and wide-angle scanning of array antenna,and has a broad application prospect in mobile base stations.

关 键 词：移动通信 宽波束天线 相控阵 双线极化 宽角域扫描 

分 类 号：TN929.5[电子电信—通信与信息系统]