DISCRIMINATOR FOR STUDYING THE NOISE PARAMETERS OF MICROWAVE GENERATORS

Introduction. Quite often, a model on detuned circuits is used to construct discriminators. Taking into account the use of a discriminator at ultrahigh frequencies, it is advisable to use volume resonators of a special design for its construction. There is a large number of designs of bulk resonators for various purposes, in particular for use in generators, amplifiers, filters, for measuring the parameters of materials, for technological installations of microwave energy, etc. The geometric shape of the resonator and the type of oscillation are chosen based on the manufacturability of the resonator, the possibility of tuning, obtaining the maximum quality factor and the desired field configuration. In our case, a cylindrical resonator operating on the TE111 double oscillation type was chosen for technical implementation. Objective. The aim of the study is to develop a discriminator based on a cylindrical resonator operating on a dual TE wave type, as well as to investigate the possibilities of its application in the study of the noise properties of microwave diode generators. Materials and methods. The materials of the study are: 1) design and technological documentation for the manufacture of a prototype discriminator, measuring instruments and methods for their use. 2) works of domestic and foreign authors conducting their scientific and practical research on the peculiarities of using discriminators in the study of signals in general and noise signals of microwave generators in particular. In the course of the study, the following scientific methods were used: theoretical generalisation and grouping (to determine the parameters of the discriminator components and predict its characteristics, select a set of control and measuring devices); formalisation, analysis and synthesis (to build a circuit of electrical connections and develop design and technological documentation); logical generalisation of results (formulation of conclusions). Results. The paper presents the results of a theoretical analysis of the possibilities of using frequency and amplitude discriminators in the study of the noise properties of microwave generators. A constructive solution of the discriminator based on the use of a cylindrical resonator operating on the TE111 double wave type is proposed, and the possibility of its application to study the noise characteristics of microwave generators is shown. Prospects. In future research, it is proposed to focus on a more detailed study of the characteristics of the discriminator, simplifying the process of its adjustment and increasing its sensitivity. This will make it possible to expand the range of its application, improve efficiency and ease of use.