枝节加载宽带圆极化介质谐振器天线设计  

Broadband Circularly Polarized Dielectric Resonator Antenna Design with Strip-loaded

作　　者：靳钊[1] 余景东 JIN Zhao;YU Jingdong(School of Information Engineering,Chang’an University,Xi’an 710021,China)

机构地区：[1]长安大学信息工程学院,陕西西安710021

出　　处：《无线电工程》2023年第8期1779-1784,共6页Radio Engineering

基　　金：陕西省工业攻关计划(2018GY-019)。

摘　　要：为满足无线通信系统对天线宽圆极化带宽的需求,提出了一款新型单馈宽频带圆极化矩形介质谐振器(Dielectric Resonator,DR)天线(Dielectric Resonator Antenna,DRA)。天线的主辐射体为一矩形介质谐振器,初始设计工作于主模,DR由微带线通过非对称交叉缝隙耦合馈电。为拓宽DRA的3 dB轴比带宽,利用枝节加载使其结构类似于十字交叉型,并在中央矩形DR两对角线上分别对称创建2个尺寸一致的矩形空腔从而获得更宽的3 dB轴比带宽。仿真结果表明,其-10 dB阻抗带宽达到49.6%(2.46 GHz,1.85~3.07 GHz),3 dB轴比带宽达到32.5%(2.56 GHz,2.14~2.97 GHz),最大左旋圆极化增益约为6.2 dBic。所设计天线适用于卫星通信、全球卫星定位等无线通信应用场景。A novel single-feed broadband circularly polarized rectangular Dielectric Resonator(DR)Antenna(DRA)is proposed to meet the requirement of wide circular polarization bandwidth for wireless communication systems.The main radiator of the proposed antenna is a rectangular dielectric resonator,which is initially designed to work at the fundamental mode.DR is fed by microstrip line through asymmetric cross slot coupling.In order to broaden the 3 dB axial ratio bandwidth of DRA,the strip loading is used to make its structure similar to the cross type,and two rectangular cavities of same size are created symmetrically on the two diagonals of the central rectangle DR respectively.The simulation results show that the-10 dB impedance bandwidth reaches 49.6%(2.46 GHz,1.85~3.07 GHz),the 3 dB axial ratio bandwidth reaches 32.5%(2.56 GHz,2.14~2.97 GHz),and the maximum left rotational circular polarization gain is about 6.2 dBic.The designed antenna is suitable for wireless communication scenarios such as satellite communication and global positioning satellite.

关 键 词：宽频带 圆极化 介质谐振器天线 卫星通信 

分 类 号：TN821[电子电信—信息与通信工程]