Start Up and Saturation in Monotrons

Summary form only given. Much emphasis has been placed on microwave generators that do not require an external magnetic field so as to reduce cost, size and weight of the device. One such device is the monotron, which is a self-excited oscillator consisting of an electron team that transits across a resonant cavity, which plays the part of an ordinary LCR oscillating tank circuit. The monotron lumped equivalent circuit can be thought of as consisting of a physical tuned circuit connected to a resistor of negative resistance. For transit times near (N+1/4)T, where N is an integer and T the oscillation period, electron bunches are formed and upon reaching the cavity´s end plate in a decelerating phase of the RF field the bunches transfer energy to the cavity.