TY - JOUR
TI - A novel reconfigurable tri-mode resonator and its application to bandpass filter
AU - Cheng Jun
AU - Liu Xiu-Shan
AU - Zhang Qin
JN - Thermal Science
PY - 2022
VL - 26
IS - 2
SP - 1131
EP - 1137
PT - Article
AB - A reconfigurable tri-mode resonator and its application to tri-band bandpass  filter have been demonstrated. The proposed filter exhibits 32.8%  fractional tuning range of the first passband from 1.12-1.56 GHz and 12.73%  of the third pass-band from 2.50-2.84 GHz, and a fixed second passband at 2  GHz, respectively. The first and third frequency passbands can be tuned  independently without interfering with each other. Especially, the filter  uses a hybrid technique of lumped inductors and microstrip lines, resulting  in a very compact mechanical size of 0.12 λg × 0.08 λg, where λg is the  guided wavelength on the substrate at the central of the first passband  frequency. The measured results agree well with the simulated ones.