Noël Feix

Transmission link radiation and localized defect contribution

A complete electrical wire link between equipment boxes is analyzed using a theoretical method based on the finite-difference time-domain (FDTD) algorithm. This paper describes how the asymmetry of the transmission line created by different terminations has a direct impact on the radiation level. Thereafter, a transient experimental method is proposed to evaluate the behavior of localized defects on transmission links. The transient results lead to (S) parameters and radiation power. Simulations using the FDTD method validate the experimentation.

Static study for the analysis of ultra-short pulse propagation on complex planar structures

In this paper, a static electromagnetic study of planar structures is effected. The determination of electric and magnetic field distributions is used to deduce the characteristic impedance of these structures. The second application concerns the simulation of the line feed when a transient analysis using the finite difference time domain method is used to analyse the line behaviour. In the case of a microstrip line, this new excitation method is compared to two excitations which are generally used. >

Outdoor transient measurement base in cylindrical coordinates for antenna characterization

This paper describes the outdoor transient measurement base using cylindrical coordinates system. This measurement base will be used for antennas characterization, particularly in the determination of the electric far field of any type of radiating source.

Radiation of Localized Defect on Transmission Link: Theoretical and Experimental Transient Approaches

Theoretical and experimental transient methods are proposed for radiation evaluation of localized defect on transmission link. From transient results S parameters and radiation losses are deduced. These techniques are applied to slot characterization on coaxial cable shield.

Static study of complex planar structures application to the excitation modeling of lines analysed by the finite difference time domain method

RésuméDans cet article, une étude électromagnétique statique de structures planaires est effectuée. La détermination de la répartition des champs électriques et magnétiques dans une section de ligne est présentée. La connaissance de ces champs conduit au calcul de l’impédance de la ligne considérée. La seconde application concerne la modélisation de l’alimentation d’une ligne lorsque l’analyse du comportement de celle-ci est effectuée par la méthode transitoire des différences finies. Dans le cas d’une ligne microruban, ce nouveau mode d’alimentation est comparé à deux excitations couramment utilisées.AbstractIn this paper, a static electromagnetic study of planar structures is effected. The determination of electric and magnetic field distribution in a line cross-section is discussed. This electric and magnetic field distribution is used to deduce the characteristic impedance of this line. The second application concerns the simulation of the line feed when a transient analysis using the finite difference time domain method is used to analyse the line behaviour. In the case of a microstrip line, this new excitation method is compared to two excitations which are generally used.In this paper, a static electromagnetic study of planar structures is effected. The determination of electric and magnetic field distribution in a line cross-section is discussed. This electric and magnetic field distribution is used to deduce the characteristic impedance of this line. The second application concerns the simulation of the line feed when a transient analysis using the finite difference time domain method is used to analyse the line behaviour. In the case of a microstrip line, this new excitation method is compared to two excitations which are generally used.