DIODE-BASED RESONANT PULSE GENERATOR

Abstract

Ensuring high-quality grain storage is an important task of the agro-industrial complex, since pathogenic microorganisms, insects and other pests can significantly affect its quality and cause significant losses. Traditional methods of disinfection, such as chemical treatment or thermal exposure, have a number of disadvantages, in particular the possibility of residual chemical compounds or thermal damage to the grain. In this regard, a promising direction is the use of high-frequency electromagnetic pulses, which allow for the effective destruction of pathogens without harm to the product. This work considers the development of a resonant pulse generator based on a diode as the main nonlinear element, which allows generating high-frequency and amplitude pulses. The use of semiconductor diodes with negative differential resistance (tunnel and Gunn diodes) is investigated, which are capable of supporting self-oscillations in a resonant oscillatory circuit. This allows creating effective electromagnetic pulses for use in grain disinfection technologies and other agricultural processes. The work presents a mathematical simulation of the operation of a resonant generator, which takes into account its electrophysical characteristics, the interaction of the elements of the oscillatory circuit (inductance, capacitance) and the nonlinear properties of the diode. A differential equation is proposed that describes the dynamics of pulse generation in such a system. Numerical solution methods, in particular the Runge-Kutta method, are used to analyze the behavior of current and voltage in the circuit. The simulation results show that such a generator provides stable pulse generation with specified parameters. Analysis of the time and spectral characteristics of the signal confirmed the effectiveness of using a diode as a nonlinear element to support self-oscillations. In addition, the obtained current and voltage graphs in the circuit indicate the possibility of practical use of such a system in high-frequency applications, in particular for grain disinfection. The proposed model can be used for further research and optimization of the pulse generator parameters. The use of such devices in agriculture opens up new opportunities for environmentally friendly disinfection of products without the use of chemical reagents, which makes them attractive for agro-industrial enterprises.