Microwave System for Input-Output Radiation of the Two-Cascade Gyro-TWT at 3-mm Wavelength

摘要

The paper presents the results of calculations of the output microwave systems of broadband gyro-TWTs of the 3 mm wavelength range united in the common cascade. To achieve a high output power (300 kW), it is proposed to use a cascade of two gyro-TWTs, the first of which has a relatively high gain (40–60 dB), and the second has a high output power with a moderate gain (15–20 dB). The radiation output of the first stage is performed along the axis of the tube through the waveguide depressed collector. The microwave system of the second stage has a transverse radiation input-output through a single barrier window with the signal separation by their polarizations. The transformation of wave fields is carried out by waveguide converters and a system of external quasi-optical mirrors. The calculated efficiency of the output system in the frequency range 90–100 GHz exceeds 95%. The paper compares the methods and approaches used to model the microwave systems.