I. I. Vintizenko

Relativistic magnetron microwave oscillators with external coupling of cavities

The results of experimental study of oscillatory processes in pulsed relativistic microwave oscillators with external coupling of cavities are considered. The experiments are mainly aimed at the investigation of the effect of parameters of the cavity coupling channels on the energy and spectral characteristics of microwave radiation and analysis of the possibility of stabilization of magnetron oscillatory modes and distributed extraction of power from the resonant system.

Relativistic magnetron with distributed output of microwave radiation

Problems related to the extraction and shaping of microwave radiation generated by a relativistic magnetron have been experimentally studied. A modified magnetron oscillator is described, in which a coupling waveguide channel loaded on a system of radiators is provided between elements of the resonance system. It is shown that this scheme allows the required amplitude-phase profiles of oscillations to be obtained and ensures high spectral and amplitude stability of the output radiation.

Spectral characteristics of a relativistic magnetron with coupled cavities

The spectral characteristics of a relativistic microwave magnetron with cavities coupled via an external waveguide channel have been experimentally studied. It is shown that the output microwave radiation with a stable narrow spectrum and improved energy characteristics can be obtained with properly adjusted coupling in the system.

Modifications of a relativistic magnetron

Experimental studies of relativistic magnetron microwave oscillators aimed at improving the efficiency and stability of microwave pulses are reported. To this end, the basic units of the magnetron, namely, the anode assembly, microwave radiation output device, antenna system, and cathode assembly, are considerably modified.

A cathode with end screens for a relativistic magnetron

The results of application of a cathode with end screens in relativistic magnetron microwave generators are presented. A 40–50% increase in the microwave power from that of microwave generators using cathodes without screens is obtained.

Effect of the external coupling of cavities on the stability and output power of a relativistic magnetron

Autooscillation regimes in a relativistic magnetron with external mutual coupling of cavities have been studied. It is demonstrated that the interaction of oscillations under mode competition conditions significantly increases the stability of the working oscillation mode and improves the spectral characteristics of radiation.

The Use of Ferromagnetic Screens in the Cathode of a Pulse-Periodic Relativistic Magnetron

Microwave generation by a relativistic magnetron with cathode end screens made of ferromagnetic material was experimentally investigated. The dependences of the power and the width of microwave pulses on the field induction were measured for different cathode designs. The comparison of the data we obtained with the results of experiments in which the cathodes had no screens and had nonferromagnetic screens showed that the ferromagnetic end screens increased the microwave power by approximately 60 and 13% compared to the design without any screens and with the nonferromagnetic screens, respectively.

A cathode unit of a pulse-periodic relativistic magnetron

The construction of a cathode unit of a pulse-periodic relativistic magnetron that contains an alignment adjuster for axial-symmetric installation of a cathode along the full length of anode block is described. The alignment adjuster makes it possible to rapidly adjust the relativistic magnetron to the maximum output power of microwave radiation. In this case, the process of assembling the device becomes considerably simpler.

A Magnetic Power Supply for a Relativistic Magnetron

The design of the water-cooled magnetic system of the repetitively pulsed relativistic magnetron is described. The magnetic system provides the continuous magnetron operation and produces a magnetic field of 0.55 T with an axial nonuniformity of up to <5% and current pulsations of up to <0.1% in the working area of the magnetron. The test results are presented.

A relativistic magnetron with a coupling channel as the external resonator

We present the results of the first demonstration experiments on a twofold increase in the output power of a relativistic magnetron with a waveguide coupling channel between opposite cavities of the anode assembly, which contains a specially arranged H-tee and discharge gap. Switching of the gap leads to the formation and extraction of microwave pulses with increased power and short duration from the H-tee.