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

Volume

17

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

199

Lastpage

201

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;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2006.890472

Filename

4118225