系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (6): 1205-1209.doi: 10.3969/j.issn.1001-506X.2020.06.01

• 电子技术 •    下一篇

介质谐振天线枝节驱动型频率重构特性分析

刘北佳1(), 邱景辉1(), 李国强2()   

  1. 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
  • 收稿日期:2019-09-01 出版日期:2020-06-01 发布日期:2020-06-01
  • 作者简介:刘北佳(1988-),女,工程师,博士,主要研究方向为介质谐振天线、可重构天线和毫米波成像技术。E-mail:liubeijia@hit.edu.cn|邱景辉(1960-),男,教授,博士,主要研究方向为毫米波太赫兹成像、高功率脉冲和超宽带天线技术。E-mail:qiujh@hit.edu.cn|李国强(1985-),男,高级工程师,硕士,主要研究方向为图像处理与目标识别、软件框架和可重构天线技术。E-mail:724597588@qq.com
  • 基金资助:
    国家自然科学基金(U1633202);国家自然科学基金(61731007)

Stub-driving frequency reconfigurable characteristic analysis for dielectric resonator antenna

Beijia LIU1(), Jinghui QIU1(), Guoqiang LI2()   

  1. 1. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
    2. Department of Image Recognition, Harbin Kejia General Mechanical and Electrical Company, Harbin 150006, China
  • Received:2019-09-01 Online:2020-06-01 Published:2020-06-01
  • Supported by:
    国家自然科学基金(U1633202);国家自然科学基金(61731007)

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)-10 dB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7.85 GHz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25 mm×25 mm×5.637 mm。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。

关键词: 介质谐振天线, 频率可重构天线, 开路枝节, T形枝节

Abstract:

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.

Key words: dielectric resonator antenna (DRA), frequency reconfigurable antenna, open-circuited stub, T-shaped stub

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