Title :
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
fDate :
11/1/1999 12:00:00 AM
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 εeff 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;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.829800
