一种方向图可重构圆极化阵列天线的设计  

Design of a pattern reconfigurable circularly-polarized antenna array

作　　者：陈梦玉 孙虎成 CHEN Mengyu;SUN Hucheng(Research Center of Applied Electromagnetics,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学应用电磁学研究中心,江苏南京210044

出　　处：《电子元件与材料》2022年第10期1099-1107,共9页Electronic Components And Materials

摘　　要：为了实现天线波束的灵活重构和调控,提出了一种方向图可重构圆极化阵列天线。阵列天线选用L型探针耦合馈电以拓宽阻抗带宽和圆极化轴比带宽,并基于提出的相位变换器设计输出端口间相位差可调的馈电网络。通过控制馈电网络中相位变换器上各PIN二极管工作状态,实现了天线的主辐射波束指向在+40°,+15°,-15°和-40°角度间切换。实测结果表明,该阵列天线在四种工作状态下的重叠阻抗带宽约为22%(2.2~2.74 GHz),重叠轴比带宽约为12.2%(2.33~2.62 GHz),且圆极化峰值增益为6.48 dBi。In order to realize the flexible reconfiguration and control of the antenna beam,a pattern reconfigurable circularly polarized array antenna was proposed.The L-shaped probe coupling feed was selected for the array antenna to widen the impedance bandwidth and the circularly-polarized axial-ratio bandwidth.A feeding network based on the proposed phase converter with adjustable phase differences between the output ports was designed.The working states of each PIN diode in the phase converters of the feeding network were controlled,so that the main radiation beam of the antenna could be switched between+40°,+15°,-15°and-40°.The measurement results show that the overlapping impedance bandwidth of the four working states of the array antenna is about 22%(2.2-2.74 GHz),the overlapping axial-ratio bandwidth is about 12.2%(2.33-2.62 GHz),and the circularly-polarized peak gain is 6.48 dBi.

关 键 词：方向图可重构天线 圆极化 馈电网络 相位可重构 

分 类 号：TN82[电子电信—信息与通信工程]