Computation of the wave propagation constant γ in broadband uniform millimeter wave transmission line

Author

Reynoso-Hernandez, J.A. ; Estrada-Maldonado, C. Fabiola ; Parra, T. ; Grenier, K. ; Graffeui, J.

Author_Institution

Div. de Fisica Aplicada, CICESE, Ensenada, Mexico

Volume

2

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

266

Abstract

Two methods are derived for computing the wave propagation constant γ of a uniform transmission line. The first one is derived from properties of matrix determinant and the second one is developed using properties of similar and unitary matrix. Both methods allow to minimise the errors due to connection repeatability. Matrices and determinants are obtained from the wave cascade matrices (computed from scattering parameter measurements) of two different length lines with identical but unknown characteristic impedance. The usefulness of the new method is demonstrated by assessing the dispersion of the dielectric constant ε_eff and the attenuation constant α of an ultra low loss transmission line in the frequency range of 0.040-65 GHz

Keywords

S-parameters; determinants; permittivity; transmission line matrix methods; 0.040 to 65 GHz; attenuation constant; broadband uniform millimeter-wave transmission line; characteristic impedance; determinant; dielectric constant; scattering parameter; similar matrix; unitary matrix; wave cascade matrix; wave propagation constant; Attenuation; Dielectric constant; Dielectric losses; Dielectric measurements; Impedance measurement; Length measurement; Propagation constant; Scattering parameters; Transmission line matrix methods; Transmission line measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999 Asia Pacific

Print_ISBN

0-7803-5761-2

Type

conf

DOI

10.1109/APMC.1999.829800

Filename

829800