Yu. I. Alekseev

A study of the Gunn oscillator in deterministic and chaotic modes

Results of the experimental study of the Gunn oscillator in the deterministic and chaotic modes are presented. The design philosophy of the studied oscillator and method of its changing to the dynamic chaotic state are described.

Determination of Basic Characteristics of Synchronization of Gunn Self-Excited Oscillators

Experimental results on synchronization of a P-band Gunn self-excited oscillator are presented.

An experimental study of the development dynamics of the chaotic oscillation mode in a deterministic self-oscillatory microwave system

A possibility of experimentally obtaining an increased-output-power noise generator operating in the 3-cm wavelength range is considered. The noise generator was obtained by changing the self-excited oscillator, based on an avalanche-transit diode, to the chaotic generation mode by an external microwave signal action. Spectra of obtained chaotic generator oscillations with different parameters of both the generator and the external signal are presented. The statistical estimate of the quality of generated noise is given.

Analysis of transition of a deterministic self-oscillating microwave system to the chaotic generation mode

The results of an experiment on the development of a high-efficiency noise generator by transferring an avalanche-diode self-oscillator to the chaotic generation mode are presented. It is demonstrated that the noise level of such a generator exceeds by far the analogous parameter of traditional microwave noise sources.

Some aspects of application of autodyne asynchronous radio systems

Different radio functions of autodyne asynchronous systems are considered. Recommendations on calculations of basic parameters of these systems are given, and aspects of their practical application are pointed out.

A noise source based on an IMPATT-diode self-oscillating system

The efficiency of noise generation by an IMPATT diode in a centimeter-band self-oscillating system is studied.

Stability of semiconductor injection lasers in the framework of the model described by rate equations

The stability of semiconductor injection lasers is studied on the basis of the analysis of the first Lyapunov exponent and the characteristic parameters of the laser rate equations.

Amplification of microwave oscillations on harmonics of the Gunn diode conductivity

The results of studying microwave amplifiers on the second harmonic of the negative conductivity of Gunn diodes operating in the centimeter waveband are presented.

An experimental study of the self-heterodyne detection of amplitude-modulated optical signals

An experimental scheme of self-heterodyne detection of amplitude-modulated optical signals is presented. The results of the experimental study of the power transfer constant of the [AS1][AS2] system are given.

Synchronization of a Gunn Self-Oscillator as a Nonisochronous Active Oscillatory System

The possibility of considering nonisochronous properties of a Gunn self-oscillator during its synchronization that results in a nonsymmetric amplitude-frequency characteristic is discussed. The results of calculations are compared with experimental results.