DocumentCode :
1333941
Title :
Microstrip bandpass filters using cross-shaped triple-mode resonator
Author :
Tu, Wen-Hua
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan
Volume :
4
Issue :
9
fYear :
2010
fDate :
9/1/2010 12:00:00 AM
Firstpage :
1421
Lastpage :
1426
Abstract :
Compact three-pole microstrip bandpass filters (BPFs) are presented. The basic block is a triple-mode resonator that consists of a conventional half-wave resonator, a shunt open-circuited stub and a shunt short-circuited stub. The half-wave resonator, the shunt open-circuited stub and the shunt short-circuited stub control each of the first three resonant frequencies. Then, two BPFs using the resonator are designed, fabricated and tested to validate the design concept. For the narrow-band BPF, from 2.4 to 2.6 GHz, the measured return loss is greater than 15 dB and the measured insertion loss is less than 1.7 dB. For the broadband one, from 1.25 to 3.9 GHz, the measured return loss is greater than 12 dB and the measured insertion loss is less than 1.5 dB. The group delay variation is 0.45 ns.
Keywords :
band-pass filters; microstrip filters; resonators; conventional half-wave resonator; cross-shaped triple-mode resonator; microstrip bandpass filters; shunt open-circuited stub; shunt short-circuited stub;
fLanguage :
English
Journal_Title :
Microwaves, Antennas & Propagation, IET
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2009.0364
Filename :
5585269
Link To Document :
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