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The generalized algorithm of parametrical synthesis of resistive two-port networks for operated matching-filtering devices with various types of an external feedback


A.A. Golovkov – Dr. Sc. (Eng.), Professor, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
V.A. Golovkov – Design Engineer, Voronezh Design Office of Antenna-Feeder Devices
M.A. Oblogin – Junior Research Scientist, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)

The transfer functions of operated matching-filtering devices presented in a uniform structural kind, for used variants of an external feedback are defined at inclusion of the resistive two-port network between a nonlinear part and loading. Resistive elements in a wide strip of frequencies possess independence of the resistance of frequency. Therefore, their use can lead to realignment of the matching-filtering devices in a wider frequency band. The systems of the algebraic equations meeting requirements to transfer functions of operated matching-filtering devices with the account consecutive and parallel on current or pressure of feedback are generated and solved. In interests of reduction of an order of the equations of the decision are spent to two stages. At the first stage of the decision are received in the form of interrelations between elements of a classical matrix of transfer of the resistive two-port network, optimum by criterion of maintenance of the modules set the relation and a difference of phases of transfer function in two conditions at a minimum quantity of two-poles. One condition is defined by the first set high frequency and the first level of amplitude of a low-frequency operating signal, and other condition – the second set high frequency and the second level of amplitude of an operating signal. At the second stage parameters quasi-optimal two-poles of typical schemes of the resistive two-port networks, providing realization of optimum interrelations in the limited strip of frequencies are defined. Theoretical results of synthesis and the results received by scheme-technical modelling, well coincide.

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