Design of two-stage UIR and SIR bandpass filters with an elliptic function-like response

Author

Kuo, Jen-Tsai ; Hsieh, Wan-hsin ; Jiang, Meshon

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

3

fYear

2004

fDate

6-11 June 2004

Firstpage

1609

Abstract

Two-stage bandpass filters with a sharp transition band are presented. The two stages are cascaded by a direct coupling scheme, as well as a three-line structure. Each half-wave resonator is trapped with a quarter-wave open stub at its center and a transmission zero can be created. The positions of the two zeroes can be easily tuned to locate close to the passband, so that an elliptic function-like response can be obtained. Both uniform impedance resonators (UIRs) and stepped impedance resonators (SIRs) are employed in the design. Experimental results show a close agreement with the design.

Keywords

band-pass filters; cascade networks; elliptic filters; frequency response; microstrip circuits; resonators; zero assignment; SIR bandpass filters; direct coupling; elliptic function-like response; half-wave resonator; microstrip circuit; quarter-wave open stub; sharp transition band; stepped impedance resonators; three-line structure; transmission zero; two-stage UIR; two-stage bandpass filters; uniform impedance resonators; Band pass filters; Circuits; Couplings; Filtering theory; Frequency; Impedance; Microstrip filters; Microwave filters; Passband; Resonator filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1338890

Filename

1338890