Investigation of Transient and Steady-State Behavior of Current Components in Spatial Harmonic Magnetron by Drift Orbital Resonance Theory

The drift orbital resonance theory has the potential to analyze and estimate the electron dynamics in a magnetron. Hence it has been utilized to examine the behavior of the rotating electron cloud in a spatial harmonic magnetron (SHM). Alteration of the theory variables, namely the orbital velocities, coefficients of radial expansion, gyrating circle radius, accelerating factor, etc., affects the electron trajectory forming numerous epicycloid, hypocycloid, and circular patterns. These variables are dependent on some of the physical and electrical input parameters, namely the structural geometry, the applied voltage, the applied magnetic field, etc. They thus can be used to alter and predict the rotating electron's trajectories, which in turn control the device performance as well as help to understand and visualize the response of the rotating electron cloud in the designed SHM. The manuscript also presents the analysis of the nature of the steady-state and transient response of the current components of the designed SHM (operating at 136 GHz) obtained from CST simulations and provide reasonable explanation using drift orbital resonance theory.