Title :
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
fDate :
9/1/1999 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
