介质谐振天线枝节驱动型频率重构特性分析  

Stub-driving frequency reconfigurable characteristic analysis for dielectric resonator antenna

作　　者：刘北佳 邱景辉[1] 李国强 LIU Beijia;QIU Jinghui;LI Guoqiang(School of Electronics and Information Engineering,Harbin Institute of Technology,Harbin 150001,China;Department of Image Recognition,Harbin Kejia General Mechanical and Electrical Company,Harbin 150006,China)

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001 [2]哈尔滨市科佳通用机电股份有限公司图像识别部,黑龙江哈尔滨150006

出　　处：《系统工程与电子技术》2020年第6期1205-1209,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(U1633202,61731007)资助课题。

摘　　要：为了满足认知无线电系统对于天线的动态需求,提出了一种介质谐振天线(dielectric resonator antenna,DRA)-10dB阻抗带宽重构方法。采用的天线由阶梯阻抗微带线激励,并与截断的地板相结合,以使矩形DRA具有带宽为7.85GHz的宽带状态用于频谱感知。在馈线高阻抗和低阻抗区域分别引入开路枝节和T形枝节,并通过p-i-n二极管开关控制,以获得相应频段的窄带特性用于通信。连接在地板上的枝节可使天线工作在陷波状态,用于滤除干扰。天线尺寸为25mm×25mm×5.637mm。为了验证设计的有效性,加工测试了一个可重构DRA原型,仿真和测试结果具有良好的一致性。A rectangular dielectric resonator antenna(DRA)with a reconfigurable impedance bandwidth of-10 dB is presented for cognitive radios.The antenna is fed by a stepped impedance transform offset microstrip line with truncated ground,which makes it operated at a wideband state with a bandwidth of 7.85 GHz for sensing the spectrum.Open-circuited stub and T-shaped stub are introduced for generating narrow band state controlled by p-i-n diodes respectively for communications.The stub connected with the ground plane makes the antenna operated at the band-notched state for filtering out interference.It has a compact dimension of 25 mm×25 mm×5.637 mm.In order to verify the design,a reconfigurable DRA prototype is fabricated and measured.Simulation and experimental results show a good uniformity.

关 键 词：介质谐振天线 频率可重构天线 开路枝节 T形枝节 

分 类 号：TN82[电子电信—信息与通信工程]