Excitation of third cyclotron harmonics in a gyrotron with feedback

In this paper, theoretical and experimental results on the excitation of modes at higher cyclotron harmonics in gyrotrons using a reflector are considered. In particular, the excitation of the operating mode at the third cyclonic harmonic in a gyrotron with a frequency of 40.5 GHz and the design of the W-band gyrotron at the third cyclotron harmonic are discussed.