THEORETICAL AND EXPERIMENTAL STUDY OF PARAMETRICAL EXCITATION MICROSTRIP LATTICE WITH NONLINEAR LOADS

Abstract

In the paper the results of theoretical and experimental investigations of a microstrip lattice with nonlinear loads under parametrical excitation are discussed. For a nonlinear loaded microstrip lattice, excited plane wave, the nonlinear boundary conditions and integrated ratio in frequency domain are received for the any law of a variation in time of load parameters. A computation of reflection coefficients of a lattice is carried out for a case of harmonic variation of load parameters. Such values of amplitudes and frequencies of variation of parameters of voltagecurrent characteristic coefficients in case of which reflection coefficients of lattice at some combination frequencies are comparable with reflection coefficient at fundamental frequency are found theoretically. The spectrum of the signal, scattered on model of finite microstrip lattice with nonlinear loads under a parametric action on them, is experimentally studied. The features of behavior of combinational components, of harmonics of frequency of the control signal, of the reflection coefficient at the frequency of the incident wave are found experimentally when the parameters of the control signal is varied according to a harmonic law. High-quality coincidence of computing and experimental data is received.