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A K u band frequency‐reconfigurable dielectric resonator antenna using metallic pillars
Author(s) -
Tong ChangWu,
Tang Hui,
Qin Wei,
Yang WenWen,
Chen JianXin
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32227
Subject(s) - dielectric resonator antenna , dielectric resonator , resonator , reconfigurable antenna , materials science , dielectric , frequency band , antenna (radio) , optoelectronics , electrical impedance , polarization (electrochemistry) , range (aeronautics) , optics , electrical engineering , physics , radiation pattern , antenna efficiency , engineering , chemistry , composite material
A K u band frequency‐reconfigurable dielectric resonator antenna (DRA) using metallic pillars is presented in this letter. A novel frequency tuning method of the DRA is proposed by selectively loading metallic pillars at two narrow sides of the DRA. Resonating at its fundamental TE 111 y mode, the operating frequency of the DRA can be continuously controlled by changing the heights of the pillars in a large frequency tuning range. In the range, the DRA remains good impedance match, stable radiation patterns, and low cross‐polarization level. To verify the proposed method, a prototype operated at K u band is designed, fabricated and measured. A measured frequency tuning range of 33% with gain higher than 5.3 dBi and cross‐polarization level less than −20 dB are achieved within the range, showcasing reasonable agreement with the simulated results.