Title :
Piezoelectric Transducer-Controlled Dual-Mode Switchable Bandpass Filter
Author :
Tu, Wen-Hua ; Chang, Kai
Author_Institution :
Dept. of Electr. & Comput. Eng, Texas A&M Univ., College Station, TX
fDate :
3/1/2007 12:00:00 AM
Abstract :
A piezoelectric transducer-controlled dual-mode switchable bandpass filter is introduced. A piezoelectric transducer is used to lift up or pull down the attached dielectric substrate perturbation. When the dielectric substrate is pulled down, the perturbation excites dual modes and the dual-mode filter is on. The return loss is better than 10 dB and the insertion loss is less than 3 dB from 2.92 to 3 GHz. When the dielectric substrate is lifted up, the dual-mode resonator is unperturbed and the dual-mode filter is off. The isolation is 21 dB at 3 GHz. The on-off ratio is 18 dB
Keywords :
UHF filters; band-pass filters; microwave filters; piezoelectric transducers; 2.92 to 3 GHz; dielectric substrate perturbation; dual-mode switchable bandpass filter; piezoelectric transducer; Band pass filters; Dielectric substrates; Frequency; Microswitches; Microwave filters; Optical ring resonators; Piezoelectric transducers; Resonator filters; Switches; Tunable circuits and devices; Dual-mode bandpass filter (BPF); piezoelectric transducer; switchable;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.890472
