基于双模槽线谐振器的宽带滤波介质谐振器天线  

Wideband Filtering Dielectric Resonator Antenna Based on Dual Mode Slotline Resonator

作　　者：王传云[1] 江晓锋 张永华 胡伟康 樊启磊 Wang Chuanyun;Jiang Xiaofeng;Zhang Yonghua;Hu Weikang;Fan Qilei(School of Information Engineering,East China Jiaotong University,Nanchang 330013,China;BYD Co.,Ltd.,Shenzhen 518118,China)

机构地区：[1]华东交通大学信息工程学院,江西南昌330013 [2]比亚迪股份有限公司,广东深圳518118

出　　处：《华东交通大学学报》2024年第4期73-79,共7页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(62261022,62361025);江西省教育厅科学技术研究重点项目(GJJ2200609)。

摘　　要：【目的】为满足车联网等无线通信系统对小型化、多功能介质谐振器天线(DRA)的应用需求。【方法】设计了一种基于微带-双模槽线谐振器馈电结构的宽带滤波介质谐振器天线。在天线设计中,利用双模槽线谐振器来代替微带-槽线耦合馈电结构中的传统槽线,形成一种新型微带-双模槽线谐振耦合馈电网络;该馈电网络中的双模槽线谐振器可作为能量耦合结构,从而有效激励DRA的基模(TE111);同时,也可产生两个槽线谐振模式参与天线谐振,拓宽天线带宽。此外,通过在微带馈线上引入马刺线以及槽线谐振器自身谐振特性,可以在天线通带两侧分别产生一个辐射零点,在增益曲线上呈现准椭圆滤波响应。【结果】为了进一步验证天线设计性能,对天线进行了加工、测试,测试与仿真结果基本一致。该天线中心频率为4.12GHz,阻抗带宽为53.40%(3.02~5.22 GHz),带内平坦增益为5.7 dBi。【结论】满足5G和车联网等无线通信系统的应用需求。【Objective】To meet the application requirements of miniaturized and multifunctional dielectric reso-nator antennas(DRA)in wireless communication systems,such as the Internet of Vehicles(IoV).【Method】A wideband filtering dielectric resonator antenna based on a microstrip-dual mode slotline resonator feeding struc-ture is proposed.In the antenna design process,the traditional slotline of the microstrip-slotline coupled feeding structure was replaced by a dual mode slotline resonator,forming a novel microstrip-dual mode slotline resona-tor coupling feeding network.This dual mode slotline resonator served as an energy coupler in the feeding net-work,which effectively excited the TE111 resonant mode of the DRA;At the same time,two slotline resonant modes could also be generated to participate in antenna resonance,broadening the antenna bandwidth.Addition-ally,by introducing a spur line on the microstrip feedline and combining the intrinsic resonance characteristics of the slotline resonator,a radiation null can be produced on both sides of the antenna passband,showing a quasi-el-liptical filter response on the gain curve.【Result】To further verify the performance of the antenna design,a pro-totype FDRA was fabricated and measured,and the measurement and simulation results were generally consis-tent.The central frequency of the antenna is 4.12 GHz,the impedance bandwidth is 53.40%(3.02~5.22 GHz),and the in-band flat gain is 5.7 dBi.【Conclusion】The antenna meets the application requirements of wireless communication systems,such as 5G and telematics.

关 键 词：介质谐振器天线 微带-槽线谐振器 滤波 宽带 

分 类 号：U285[交通运输工程—交通信息工程及控制]