Design of microwave devices' slow-wave structure with double rings

Abstract

Summary form only given. Slow-wave structures, which are used in electron devices, are intended to create conditions when a propagating electromagnetic wave can be most intense for interaction with a moving electron beam. It is found experimentally that the best electron-field interaction conditions are defined by those cases when electron velocity and phase wave velocity are close together. The principal role of the slow-wave structure is accumulation of high-frequency energy and fixation of the oscillation frequency. The slow-wave structure may become like a narrow bandpass filter which discriminates a definite frequency from all frequencies connecting with the electron beam . The most important characteristics of slow-wave structures are their dispersion characteristics. Using the dispersion characteristics, it is possible to estimate the value of frequency separation between oscillation modes, the possible width of the magnetron's linear tuning, the partial influence of structure construction parameters on mode frequency separation and value of tuning where stable magnetron operation is expected. In this paper, the design and simulation of the characteristics of a magnetron slow-wave structure is carried out using two essentially different methods: the field theory method and the dual circuit method.