Quasi-Analytical Theory of Gyro-BWO with Zagzag Electrosynamic Sysyem

Quasi-analytical theory of a backward-wave gyro-oscillator (gyro-BWO) with a quasi-optical system consisted of several sections and providing propagation of the wave beam along a zigzag trajectory using a mirror transmission line is described. We investigated the theory both in linear (small-signal) single-frequency approximations and on the nonlinear spatio-temporal approach in order to explain a piecewise character of the dependence of the operating frequency and power of this gyro-oscillator on the operating magnetic field, as well as the mode competition and transition to auto-modulation regimes.