一种宽频带介质谐振器天线的设计与实现

摘要

A broadband dielectric resonator antenna is proposed. Using the composite structure of monopole antenna and dielectric resonator antenna that fed by CPW,the modes of various operating bands are overlapped by adjusting the dimensions of the resonator and the construction of the CPW to extend the bandwidth.Meanwhile,the impedance of the feed line is matched by applying the slotting technology on the ground plane. Simulated and experimented results show that the bandwidth of the antenna is 2.98 GHz~7.18 GHz(S11<-10 dB),the relative bandwidth is 84.3% and the maximum gain is 4.9 dBi over the entire frequency band.The proposed wideband dielectric resonator antenna which is simply constructed in small dimensions is liable to be integrated and qualified for applications in WLAN/WIMAX communication systems.%提出了一种宽频带介质谐振器天线的设计.采用共面波导馈电的单极天线与介质谐振器天线的混合结构,通过调节谐振器尺寸与共面波导的结构,使各个工作模式的频带互相重叠,展宽所设计天线的带宽;同时地板引入开槽技术,对馈线进行阻抗匹配.通过软件仿真和实测结果显示:该天线频带宽度为2.98 GHz~7.18 GHz(S11<-10 dB),相对带宽为84.3%,带内最大增益可达4.9 dBi,很好满足WLAN/WIMAX通信系统对天线的应用需求,且结构简单,尺寸小,易集成.