Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators

Author

Sagawa, Morikazu ; Makimoto, Mitsuo ; Yamashita, Sadahiko

Author_Institution

Matsushita Res. Inst., Tokyo Inc., Kawasaki, Japan

Volume

45

Issue

7

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

1078

Lastpage

1085

Abstract

λ_g/4-,λ_g/2-, and λ_g-type transmission-line stepped-impedance resonators (SIRs) have been proposed and various practical applications have been reported on the basis of the analysis related to each resonator. This paper standardizes these three types of SIRs and systematically summarizes their fundamental characteristics, such as resonance conditions, resonator length, spurious (higher order) responses, and equivalent circuits. Practical applications which employ features of three types of SIRs are investigated with demonstrations of specific structures. Original design formulas with respect to λ_g-type dual-mode resonators are analytically derived. Advanced SIR´s using composite material and multisteps are also introduced and their availability is discussed

Keywords

Q-factor; electric impedance; equivalent circuits; microwave devices; resonators; composite material; design formulas; dual-mode resonators; equivalent circuits; fundamental characteristics; geometrical structure; higher order responses; microwave stepped-impedance resonators; multisteps; resonance conditions; resonator length; spurious responses; transmission-line; Availability; Band pass filters; Coaxial components; Composite materials; Equivalent circuits; Impedance; Mobile antennas; Resonance; Transmission line discontinuities; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.598444

Filename

598444