Physics of Wave Processes and Radio SystemsPhysics of Wave Processes and Radio Systems1810-31892782-294XPovolzhskiy State University of Telecommunications and Informatics981010.18469/1810-3189.2021.24.3.46-55Research ArticleParametrical synthesis of radio devices with the set quantity of identical cascades for variants of inclusion of jet two-port networks between a source of a signal and a nonlinear partGolovkovAleksandr A.<p>Doctor of Technical Sciences, Professor of the Department of Aviation Systems and Radio Navigation and Radio Communication Complexes</p>valgol2595@gmail.comFominAleksey V.<p>Head of The Training and Command Post of the Department of Automatic Control Systems</p>folexx@mail.ruMilitary Educational and Scientific Centre of the Air Force N.E. Zhukovsky and Y.A. Gagarin Air Force Academy» (Voronezh) the Ministry of Defence of the Russian FederationMilitary Educational and Scientific Centre of the Air Force N.E. Zhukovsky and Y.A. Gagarin Air Force Academy» () the Ministry of Defence of the Russian Federation18112021243465518112021Copyright © 2021, Golovkov A., Fomin A.2021<p>The algorithm of parametrical synthesis of various radio devices with any quantity of cascades of type «the jet two-port network – a nonlinear part» by criterion of maintenance of the set frequency characteristics is developed. Nonlinear parts are presented in the form of a nonlinear element and parallel either consecutive on a current or pressure of a feedback. According to this criterion systems of the algebraic equations are generated and solved. Models of optimum two-port networks in the form of mathematical expressions for definition of interrelations between elements of their classical matrix of transfer and for search of dependences of resistance of two-poles from frequency are as a result received. It is shown, that frequency characteristics of investigated radio devices from identical cascades are identical or similar to frequency characteristics of radio devices from one cascade, but with resistance of a source of a signal and the loading, changed definitely. Such schemes are named by equivalent. The comparative analysis of the theoretical results received by mathematical modelling in system «MathCad», and the experimental results received by circuit simulation in systems «OrCad» and «MicroCap», shows their satisfactory coincidence.</p>parametrical synthesis of the jet two-port networksthe set forms of frequency characteristics of multicascade radio devicesпараметрический синтез реактивных четырехполюсниковзаданные формы частотных характеристик многокаскадных радиоустройств[Golovkov A.A., Golovkov V.A. Parametric Synthesis of Radio Engineering Devices and Systems. Voronezh: VUNTs VVS «VVA», 2018, 588 p. (In Russ.)][Golovkov A.A., Golovkov V.A., Druzhinina N.A. Parametric synthesis of angle modulated signal demodulators and amplifiers for options for connecting matching complex two-port networks between the nonlinear part and the load. Informatsionno-izmeritel’nye i upravljajuschie sistemy, 2017, no. 1, pp. 53–64. (In Russ.)][Golovkov A.A., Golovkov V.A. Algorithms for parametric synthesis of matching according to the criterion of ensuring a stationary mode of generation of reactive and resistive two-port networks in the feedback circuit of autogenerators. Informatsionno-izmeritel’nye i upravljajuschie sistemy, 2016, no. 3, pp. 56–67. (In Russ.)][Gurevich I.V. Basics of Calculating Radio Engineering Circuits (Linear Circuits with Harmonic Influences). Moscow: Svjaz’, 1975, 368 p. (In Russ.)]