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.
作者
刘北佳
邱景辉
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)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
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。
关键词
介质谐振天线
频率可重构天线
开路枝节
T形枝节
dielectric resonator antenna(DRA)
frequency reconfigurable antenna
open-circuited stub
T-shaped stub
