Radiophysical processes in thin-film structures

In the presented article the radio physical processes proceeding in nonlinear parametric zonal systems (NPS) are analyzed. Such NPS are the foundation of parametric generators of signals, parametric modulators-amplifiers and many other types of parametric transducers on which resonance circuits that are widely applied in modern radio electronics are built. However, NPS with weak nonlinearity, working or on current subharmonics or on combination of frequencies, in the first zone of instability of electromagnetic oscillations, are still used. For implementation of further transition to thin-film structures with distributed parameters it is necessary to consider the mechanism of resonant circuit interaction with external influence of pumping and the process of parametric excitation of oscillations. It is important to analyze the nonlinear phenomena in the first and in the higher zones of instability of electromagnetic oscillations where current ultraharmonics are arising.