Etude des microcircuits hyperfréquences en régime dynamique

The transmission line matrix method is applied to the numerical modeling of microwave circuitry and transmissions. Simple equivalences are employed to associate the Maxwell equations for an electromagnetic field with the equations of propagation for voltage and current along bifilary lines forming a virtual three-dimensional cross-hatched network. A nodal group of lines crossing at the vertices of a cube are modeled, with connections either in series or parallel operation. A transfer function is developed using the amplitude and the phase of the perturbation for the system of antenna/guide/dielectric antenna. The accuracy of computer-based analysis of the microwave signal is found to be enhanced by first filtering the signal according to geometric and electrical symmetries, then using a fast Fourier transform to obtain the gain in time and precision in reading the frequency response spectra.