Dual-mode quasi-elliptic-function bandpass filters using ring resonators with enhanced-coupling tuning stubs

Author

Hsieh, Lung-Hwa ; Chang, Kai

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

50

Issue

5

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

1340

Lastpage

1345

Abstract

A novel microwave dual-mode quasi-elliptic-function bandpass filter structure has been designed and fabricated. The filter uses L-shaped coupling arms for enhanced coupling and dual-mode excitation. The effects of varying the length of tuning stubs and gap size between tuning stubs and ring resonator have been studied. Filters using multiple cascaded ring resonators with high rejection band are presented. The new filters have been verified by simulation and measurement with good agreement

Keywords

UHF filters; band-pass filters; microstrip filters; microstrip resonators; microwave filters; resonator filters; L-shaped coupling arms; dual-mode quasi-elliptic-function filter; enhanced coupling; high rejection band; loaded Q; microstrip resonator; microwave bandpass filter; multiple cascaded resonators; narrow passband bandwidth; ring resonator; sharp rejection band; tuning stubs; unloaded Q; Band pass filters; Coupling circuits; Dielectric losses; Feeds; Insertion loss; Microstrip resonators; Microwave filters; Optical ring resonators; Resonator filters; Tuning;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.999148

Filename

999148