CPW无空气桥功分器设计及其在阵列天线中的应用  

Design of CPW airbridge-free power splitter and its application in antenna array

作　　者：刘一麟 LIU Yilin(Southwest China Institute of Electronic Technology,Chengdu Sichuan 610036,China)

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《太赫兹科学与电子信息学报》2022年第6期595-600,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：共用技术和领域基金资助项目(61402090107)。

摘　　要：针对传统微带圆极化阵列天线存在带宽较窄、尺寸较大等问题,提出一种新颖的基于共面波导(CPW)槽线转换结构的无空气桥功分器,并基于此功分器设计了一款紧凑型高定向性圆极化阵列天线。设计的共面波导功分器利用共面波导奇模式方法实现了能量分配,不需使用空气桥结构及四分之一波长匹配线,因此尺寸更加紧凑,结构更加简单。利用此功分器设计的圆极化阵列天线剖面厚度仅为1 mm,轴比带宽为4.14%,阻抗带宽为7.03%;在5.8 GHz时,实测增益为8.412 dBi,在保证低剖面、小尺寸的同时,可提供足够的工作带宽以及天线增益。A novel Coplanar Waveguide(CPW)airbridge-free power divider based on CPW-slotline transition is proposed in order to solve the problem of narrow bandwidth and large size of traditional circularly polarized microstrip array antenna.By using the power divider,a compact CPW-fed circularly-polarized array antenna with high directivity is designed.Compared with traditional CPW power divider,the proposed power divider has realized energy distribution by utilizing odd mode of CPW rather than suppressing this mode,which means the power divider needs no airbridge structure.Meanwhile,since there is no need to use 1/4 wavelength matching line,the antenna size is more compact and the structure is simpler.The designed circularly-polarized antenna array is only 1 mm in thickness,the measured axial ratio bandwidth and impedance bandwidth is 4.14%and 7.03%respectively.In addition,the measured gain is 8.412 dBi at 5.8 GHz.Therefore,the proposed array antenna can simultaneously provide adequate working bandwidth and gain while ensuring low profile and small size.

关 键 词：共面波导功分器 槽线 圆极化 低剖面 顺序旋转馈电 

分 类 号：TN821.1[电子电信—信息与通信工程]