超宽带小尺寸介质谐振器天线  

A Compact Ultra-Wideband Dielectric Resonator Antenna

作　　者：曾小虎[1] 葛悦禾[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2015年第2期171-174,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省百人计划项目(24201224);福建省厦门市"双百计划"资助项目(24201328);福建省泉州市科技计划资助项目(Z1424008);华侨大学高层次人才科研启动项目(11BS301)

摘　　要：研究一种工作于3.1~10.6GHz频段的超宽带叠层介质谐振器天线.将低介电常数薄介质片插入介质谐振器和金属地面之间,可有效降低介质谐振器的Q值,展宽天线带宽.在介质谐振器下部切去1个小四面体,产生1个空气缝隙,进一步展宽天线带宽并提高阻抗匹配.对空气缝隙尺寸进行优化,使各个工作模式的频带相互重叠,产生超宽带工作带宽.在天线一侧短接金属壁,减小天线总尺寸一半以上.对设计的介质谐振器天线进行仿真实验,结果表明：试验和仿真结果一致性较好;介质谐振器天线实现4∶1的带宽（相对带宽约118%）,带内增益为4~8dBi.An ultra-wideband staked dielectric resonator antenna operating at 3.1-10.6GHz band is studied.By inserting a low-permittivity thin dielectric sheet between the dielectric resonator and the ground,the Qfactor of the dielectric resonator can be reduced effectively and broadening the antenna bandwidth.When cutting a small tetrahedron at the lower part of the dielectric resonator,an air gap is generated the bandwidth and the impedance matching of the antenna are enhanced.Through adjusting the dimensions of the air gap,multiple operating modes can be overlapped,resulting in an ultra-wide operating band.A shorting metal wall,based on the image theory,is placed on one side of the dielectric resonator,to reduce more than 50% of the antenna size without compromising the performance of the antenna.By simulating and testing to the dielectric resonator antenna,the result shows：the proposed dielectric resonator antenna achieves 4∶1a bandwidth（up to 118%）and the gain of 4-8dBi over the bandwidth.

关 键 词：介质谐振天线 介质谐振器 叠层天线 超宽带天线 

分 类 号：TN822[电子电信—信息与通信工程]