Open AccessSwitchable differential filter using dual‐mode dielectric resonator
Author(s) -
Yuan XiaoXiao,
Zhou LiHeng,
Chen JianXin
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.0349
Subject(s) - passband , resonator , filter (signal processing) , differential (mechanical device) , materials science , dielectric resonator , optoelectronics , dielectric resonator antenna , diode , acoustics , electronic engineering , band pass filter , optics , physics , electrical engineering , engineering , thermodynamics
This Letter presents a method for designing a switchable differential filter with high performance using dual‐mode dielectric resonator (DR). It consists of a half‐cut dual‐mode DR, four feeding probes and a printed circuit board which is embedded in the bottom of the metal cavity to enable the integration of the four PIN diodes. In this case, the dual modes of the DR can be differentially excited well by two pairs of feeding probes for constructing the differential passband. By controlling the probe end as open/short status, the differential external quality factor can be adjusted so that the passband is switchable. To validate the proposed idea, a compact switchable differential filter with good performance is designed, fabricated and measured. The simulated and measured results in two states with the good agreement are presented.