Dual-mode stepped-impedance ring resonator for bandpass filter applications

Author

Matsuo, Michiaki ; Yabuki, Hiroyuki ; Makimoto, Mitsuo

Author_Institution

Mobile Commun. Res. Lab., Matsushita Res. Inst. Tokyo Inc., Kawasaki, Japan

Volume

49

Issue

7

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1235

Lastpage

1240

Abstract

It is well known that two orthogonal resonant modes exist within a one-wavelength ring resonator. In this paper, we focus on a ring resonator possessing an impedance step as a form of perturbation. A convenient analyzing method for obtaining the resonance characteristics of this resonator structure is presented. Furthermore, generation of attenuation poles obtained by the dual-mode ring resonator is discussed. In addition, a filter design method based on this resonator is explained, followed by experimental results, which prove the validity of the proposed design method

Keywords

UHF filters; band-pass filters; electric impedance; linear network synthesis; microstrip filters; microstrip resonators; passive filters; poles and zeros; resonator filters; attenuation poles; bandpass filter applications; dual-mode ring resonator; filter design method; impedance step; orthogonal resonant modes; resonance characteristics; stepped-impedance ring resonator; Attenuation; Band pass filters; Design methodology; Dielectric constant; Dielectric materials; Impedance; Microwave filters; Optical ring resonators; Resonance; Resonator filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.932241

Filename

932241