Exponentially tapered non-uniform transmission lines

Author

Vegni, L. ; Urbani, F. ; Toscano, A.

Author_Institution

Dept. of Electron. Eng., Third Univ. of Rome, Italy

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1492

Lastpage

1495

Abstract

We solve the transmission line equations for a non-uniform transmission line (NUTL). The analytical method used is different to the Kuroda´s one. First we find the solution in terms of voltage and current waves, then the expression of input impedance that allow us to find the R=const and X=const loci. In particular the solution is found for an exponential NUTL. We find the correspondent representation of the Smith chart. The NUTL has more advantages with respect to the uniform one. In fact we can use the generalised Smith chart to solve easily the problem of a NUTL loaded by a complex impedance. Moreover, we can use the NUTL to match lines with different sections and to model multilayered semiconductor structures. Finally, we show the normalised power behaviour for an exponentially tapered NUTL when the tapering factor is varying

Keywords

electric impedance; transmission line theory; transmission lines; analytical method; complex impedance loaded line; current waves; exponentially tapered nonuniform transmission lines; generalised Smith chart; input impedance; multilayered semiconductor structures; normalised power behaviour; transmission line equations; varying tapering factor; voltage waves; Admittance; Design methodology; Electromagnetic modeling; Equations; Impedance; Influenza; Shape; Transmission lines; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582543

Filename

582543