The invention discloses a reflection enhanced
gyrotron, and belongs to the technical field of
millimeter wave devices. The reflection enhanced
gyrotron is mainly characterized in that an electromagnetic wave reflector is arranged on the inner side or the outer side of an output window of the
gyrotron so as to reflect part of electromagnetic
waves output by the gyrotron back into the gyrotron body,that is, a feedback process is introduced, so that the beam-
wave effect of the whole gyrotron in a working mode is enhanced, the requirement for overcoming mode competition is reduced, and the gyrotron can more easily achieve single-mode work in a specified mode. In addition, a special-shaped quasi-optical mode converter is further arranged, so that the
peripheral electromagnetic beams deviate from the original direction and turn over in the gyrotron, and the beam-wave interaction is further enhanced.