DocumentCode
1219036
Title
Low-loss and high-selectivity bandpass filter with harmonic suppression and piezoelectric transducer tuning
Author
Hsieh, Lung-Hwa ; Chang, Kai
Author_Institution
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Volume
39
Issue
10
fYear
2003
fDate
5/15/2003 12:00:00 AM
Firstpage
783
Lastpage
784
Abstract
A low-loss and high-selectivity bandpass filter with harmonic suppression and piezoelectric transducer (PET) tuning is presented. At the 3.5 GHz passband, the insertion loss is 1.48 dB, and the transmission zeros at 3.05 and 4.08 GHz have a rejection of 55 dB. The rejection at the 7 GHz second harmonic is 50 dB. A PET tunes the bandstop sections to obtain a tunable suppression (>45 dB) around the second harmonic from 5.35 to 7.8 GHz.
Keywords
band-pass filters; circuit tuning; harmonics suppression; losses; microstrip filters; microstrip resonators; microwave filters; passive filters; piezoelectric transducers; resonator filters; 1.48 dB; 3.05 to 7.8 GHz; SHF; asymmetric-fed ring resonators; harmonic suppression; high-selectivity bandpass filter; input stopband circuits; insertion loss; low-loss filter; microstrip ring resonator; open-loop ring resonators; output stopband circuits; piezoelectric transducer tuning; transmission zeros;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20030514
Filename
1204782
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