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Reconfigurable bandstop filter with tunable center frequency and bandwidth using piezoelectric transducer
Author(s) -
Jun Sungyun,
Chang Kai
Publication year - 2013
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.27894
Subject(s) - center frequency , bandwidth (computing) , stub (electronics) , band stop filter , microstrip , transducer , dielectric , microwave , wavelength , piezoelectricity , materials science , optoelectronics , electrical engineering , band pass filter , low pass filter , engineering , telecommunications
A reconfigurable bandstop filter with tunable center frequency and bandwidth using a piezoelectric transducer (PET) is presented. The proposed reconfigurable bandstrop filter consists of a PET and two quarter‐wavelength open‐stub microstrip lines. Tuning center frequency and bandwidth are achieved by varying the dielectric constants of a quarter‐wavelength open‐stub microstrip line using a controlled dielectric perturber under a PET in two quarter‐wavelength open‐stub microstrip lines. The proposed filter has a 8.7% tuning range at center freuqnecy from 4.62 to 5.06 GHz and 29% tuning range of bandwidth (>25 dB) from 990 to 1280 MHz with varied DC voltages. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2670–2672, 2013