The continuously varying transmission-line technique - application to filter design

Author

Le Roy, Marc ; Pérennec, André ; Toutain, Serge ; Calvez, Léon Claude

Author_Institution

Lab. for Electron. & Commun. Syst., Brest Univ., France

Volume

47

Issue

9

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

1680

Lastpage

1687

Abstract

In this paper, an original approach to analyze and optimize continuously varying transmission lines (CVTLs) is used to design planar microwave filters. The method is based on exact solutions of the telegrapher´s relations of nonuniform transmission lines. The CVTL scattering parameters are investigated in detail in the frequency domain. In order to validate the method, several different CVTLs are built using microstrip and coplanar-waveguide technology. Measured data are presented and compared with theory over a wide frequency range

Keywords

S-parameters; coplanar waveguide components; frequency-domain analysis; microstrip filters; microwave filters; network synthesis; transmission line theory; waveguide filters; continuously varying transmission line; coplanar waveguide filter; frequency domain; microstrip filter; nonuniform transmission line; planar microwave filter design; scattering parameters; telegrapher equation; Design optimization; Distributed parameter circuits; Frequency domain analysis; Microstrip; Microwave filters; Planar transmission lines; Scattering parameters; Transmission line measurements; Transmission line theory; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.788609

Filename

788609