High frequency characteristics of radial three-cavity transmit time oscillator

The field distribuition in the high frequency structure of the radial three-cavity transmit time oscillator was solved approximately. Frequencies and field distribution characteristics of the models are obtained. When the ratio of the cavity radial length to the average radius is 0.34, the solution of the analytical theory is conformed with the simulative one. The error of the solution compared with the simulative results was analyzed comparing the results of the two. The results indicates that the relative error of the field swing decreases with the reducing of the ratio of the cavity radial length to the average radius. When the ratio is less than 0.3, the relative error is less than 5.4%.