Yu.I. Alekseev - Dr.Sc. (Eng.), Professor, Department of Antennas and Radio Transmitting Equipments, Southern Federal University (Taganrog) I.V. Semernick - Post-graduate Student, Department of Antennas and Radio Transmitting Equipments, Southern Federal University (Taganrog). E-mail: ione7nick@yandex.ru

Development of the microwave oscillator always is accompanied by the wide using control elements of oscillating system and electronic influence on the whole system, active element parameters variation (currents and voltages) for example, that are specify the oscillator modes of operation and essentially influencing to the stability of this modes. It is known that under working with IMPATT self-oscillator diode current plays a main role in production microwave oscillations in the system and furthermore working diode current is a main primary parameter and its smooth changing results in originating of microwave oscillations in the IMPATT oscillator by way of microwave current and differential equation that is describing the originating oscillation usually composing for this current. In connection with above detailed research of IMPATT current influence to changing of the oscillator modes of operation is reasonable. Deterministic mode of the researching oscillator satisfactory matching with the similar mode under numerical solution of its equations, but it is not able to transform researching system to another oscillating mode by regulating the oscillator control elements. Thereupon for transform dynamical system to the chaotic mode it is should to have inertial feedback that allows supplying own delayed signal. As known in the microwave band feedback is creating by inclusion the discontinuity and output signal will reflecting from this one with a certain reflecting rate k and come back to the system with a certain phase delay. Adducing bifurcation diagrams visually shows role of the IMPATT diode current in forming one or another researching system oscillating modes and working current areas within of which realize one or another mode of operation.

 

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