低剖面宽带圆极化天线阵列  

Low-profile broadband circularly polarized antenna array

作　　者：朱文静[1] 张海平 赵鹏[1] 崔奉云[1] ZHU Wenjing;ZHANG Haiping;ZHAO Peng;CUI Fengyun(China Academy of Engineering Physics,Institute of Electronic Engineering,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999

出　　处：《太赫兹科学与电子信息学报》2017年第4期622-624,共3页Journal of Terahertz Science and Electronic Information Technology

摘　　要：基于双馈双线极化微带天线,结合威尔金森功分器、T形结功分器及顺序旋转馈电的优点,设计了一种新型低剖面宽带圆极化2×2天线阵列。把辐射贴片和馈电网络集成在同一介质层,有效地利用了介质空间,降低了天线的剖面,增加了天线的带宽。4个天线单元顺序旋转90°,利用一分四T形结功分器给4个单元等幅、相位依次相差90°馈电。根据Ansoft's HFSS仿真结果,制作了样机。样机实测结果和仿真结果吻合。实测结果表明,该天线阵驻波带宽可以达到27.78%,3-d B轴比带宽可以达到52%,最大增益为14.19 d B。Combining the advantages of Wilkinson power divider,T-junction power splitter and sequential-rotation feed method,a novel low-profile broadband circularly polarized2×2antenna array is designed based on the dual-fed dual-polarized microstrip antenna.Radiation patch and feed network are integrated on the same substrate to improve the usage efficiency of the substrate,thus low-profile and broadband are obtained.Four elements are rotated90°in turn.One-to-four T-junction power splitter provides the elements with balanced signals of equal magnitude and an incremental90°phase.An antenna prototype is fabricated after simulation in Ansoft's HFSS.Good agreement is found between measurement and simulation.Experimental results show that the array has a2-VSWR bandwidth of27.78%,and a3-dB axial ratio bandwidth of52%.The maximum gain is14.19dB.

关 键 词：威尔金森功分器 顺序旋转 低剖面 宽带 圆极化 

分 类 号：TN822[电子电信—信息与通信工程]