Dual Quarter-Wavelength Hairpin Bandpass Filter with Multiple Transmission Zeros

Author

Lin, Shih-Cheng ; Wang, Chi-Hsueh ; Lin, Yo-Shen ; Chen, Chun Hsiung

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

fYear

2006

fDate

11-16 June 2006

Firstpage

361

Lastpage

364

Abstract

A novel dual quarter-wavelength (lambda/4) hairpin microstrip resonator is proposed, which is composed of two lambda/4 stepped-impedance resonators (SIR´s) that are coupled through a shorted stub section. In this study, the dual resonator structure is utilized to design a bandpass filter for which the filter order may be doubled and the via number required in the conventional lambda/4 filter may be reduced to half. Specifically, a four-pole quasi-elliptic microstrip filter is realized with two pairs of transmission zeros created around the passband edges so that the filter selectivity may be improved

Keywords

band-pass filters; elliptic filters; microstrip filters; microstrip resonators; poles and zeros; resonator filters; bandpass filters; hairpin microstrip resonator; quarter-wavelength resonator; quasielliptic microstrip filter; stepped-impedance resonator; transmission zero; Band pass filters; Chebyshev approximation; Equations; Equivalent circuits; Filtering theory; Frequency; Microstrip filters; Microstrip resonators; Passband; Resonator filters; Microstrip; bandpass filter; quarter-wavelength resonator; selectivity; stepped-impedance resonator; transmission zero;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249544

Filename

4014904