Innovations in applied physics

This work presents results of experimental research of chaotic signal wide-band generator based on UHF band TWT amplifier. Two generation methods of chaotic pulses sequences were investigated.

Resistive wall amplifier is a vacuum microwave device, which has not been spread, but attracts attention again. Main features – no need to slow-wave structure and almost complete lack of feedback between output and input. The amplification occurs due to the phase shift between the electron beam and field variables that arise due to the presence of absorbing walls. The classic version of this device has high values of gain, however, if you replace the usual coating of a dielectric for metamaterial, gain increases substantially.

Terahertz-range backward wave oscillator – carcinotrons and klynotrons are widely used in radioelectronics systems for solving fundamental and applied problems. Instability of the output signal frequency of the said lamps is not worse than 10?4. The frequency of the carcinotron and klynotron output signal as a rule carried out by changing the operating voltage, i.e. with the expenditure of energy in the control circuit.

A paper presents the main stages of relativistic magnetrons’ development. We describe the designs eliminating conventional magnetrons’ shortcomings and restrictions which are associated with a radial output of radiation through a narrow slot in one of the magnetron resonators. A low breakdown threshold and an operation in only nondegenerate modes are among these restrictions.