Open AccessMiniaturised dual‐mode dielectric resonator filter with controllable passband
Author(s) -
Li HuiMin,
Shao Cheng,
Tong ChangWu,
Tang Hui,
Chen JianXin
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.3340
Subject(s) - passband , resonator , filter (signal processing) , materials science , planar , dual mode , chebyshev filter , dielectric resonator , elliptic filter , dielectric , band pass filter , acoustics , electronic engineering , optoelectronics , low pass filter , m derived filter , computer science , physics , engineering , electrical engineering , computer graphics (images)
A miniaturised dual‐mode filter based on dielectric resonator (DR) with a controllable passband is proposed in this Letter. The filter is a combination of a traditional rectangular DR and a planar metallic loop with the dual‐mode feature. The loop decreases the frequencies of the dominant modes inside the DR, thus the circuit size is greatly reduced compared with the traditional DR devices. By using commonly used tuning disk, the passband of the proposed filter can be altered freely. A demonstration example is designed and fabricated, and the simulated and measured results verify the design method with good agreement.