Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (6): 1205-1209.doi: 10.3969/j.issn.1001-506X.2020.06.01

    Next Articles

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)

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

CLC Number: 

[an error occurred while processing this directive]